Upgrade to autoconf-2.72

2 files changed, 1649 insertions, 1279 deletions

diff --git a/unix/configure b/unix/configure
index d528c32..f5bf018 100755
--- a/unix/configure
+++ b/unix/configure
@@ -1,9 +1,9 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.71 for tk 8.7.
+# Generated by GNU Autoconf 2.72 for tk 8.7.
 #
 #
-# Copyright (C) 1992-1996, 1998-2017, 2020-2021 Free Software Foundation,
+# Copyright (C) 1992-1996, 1998-2017, 2020-2023 Free Software Foundation,
 # Inc.
 #
 #
@@ -15,7 +15,6 @@
 
 # Be more Bourne compatible
 DUALCASE=1; export DUALCASE # for MKS sh
-as_nop=:
 if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
 then :
   emulate sh
@@ -24,12 +23,13 @@ then :
   # is contrary to our usage.  Disable this feature.
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
-else $as_nop
-  case `(set -o) 2>/dev/null` in #(
+else case e in #(
+  e) case `(set -o) 2>/dev/null` in #(
   *posix*) :
     set -o posix ;; #(
   *) :
      ;;
+esac ;;
 esac
 fi
 
@@ -101,7 +101,7 @@ IFS=$as_save_IFS
 
      ;;
 esac
-# We did not find ourselves, most probably we were run as `sh COMMAND'
+# We did not find ourselves, most probably we were run as 'sh COMMAND'
 # in which case we are not to be found in the path.
 if test "x$as_myself" = x; then
   as_myself=$0
@@ -131,15 +131,14 @@ case $- in # ((((
 esac
 exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
 # Admittedly, this is quite paranoid, since all the known shells bail
-# out after a failed `exec'.
+# out after a failed 'exec'.
 printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
 exit 255
   fi
   # We don't want this to propagate to other subprocesses.
           { _as_can_reexec=; unset _as_can_reexec;}
 if test "x$CONFIG_SHELL" = x; then
-  as_bourne_compatible="as_nop=:
-if test \${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
+  as_bourne_compatible="if test \${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
 then :
   emulate sh
   NULLCMD=:
@@ -147,12 +146,13 @@ then :
   # is contrary to our usage.  Disable this feature.
   alias -g '\${1+\"\$@\"}'='\"\$@\"'
   setopt NO_GLOB_SUBST
-else \$as_nop
-  case \`(set -o) 2>/dev/null\` in #(
+else case e in #(
+  e) case \`(set -o) 2>/dev/null\` in #(
   *posix*) :
     set -o posix ;; #(
   *) :
      ;;
+esac ;;
 esac
 fi
 "
@@ -170,8 +170,9 @@ as_fn_ret_failure && { exitcode=1; echo as_fn_ret_failure succeeded.; }
 if ( set x; as_fn_ret_success y && test x = \"\$1\" )
 then :
 
-else \$as_nop
-  exitcode=1; echo positional parameters were not saved.
+else case e in #(
+  e) exitcode=1; echo positional parameters were not saved. ;;
+esac
 fi
 test x\$exitcode = x0 || exit 1
 blah=\$(echo \$(echo blah))
@@ -185,14 +186,15 @@ test \$(( 1 + 1 )) = 2 || exit 1"
   if (eval "$as_required") 2>/dev/null
 then :
   as_have_required=yes
-else $as_nop
-  as_have_required=no
+else case e in #(
+  e) as_have_required=no ;;
+esac
 fi
   if test x$as_have_required = xyes && (eval "$as_suggested") 2>/dev/null
 then :
 
-else $as_nop
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+else case e in #(
+  e) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 as_found=false
 for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
 do
@@ -225,12 +227,13 @@ IFS=$as_save_IFS
 if $as_found
 then :
 
-else $as_nop
-  if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
+else case e in #(
+  e) if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
 	      as_run=a "$SHELL" -c "$as_bourne_compatible""$as_required" 2>/dev/null
 then :
   CONFIG_SHELL=$SHELL as_have_required=yes
-fi
+fi ;;
+esac
 fi
 
 
@@ -252,7 +255,7 @@ case $- in # ((((
 esac
 exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
 # Admittedly, this is quite paranoid, since all the known shells bail
-# out after a failed `exec'.
+# out after a failed 'exec'.
 printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
 exit 255
 fi
@@ -271,7 +274,8 @@ $0: message. Then install a modern shell, or manually run
 $0: the script under such a shell if you do have one."
   fi
   exit 1
-fi
+fi ;;
+esac
 fi
 fi
 SHELL=${CONFIG_SHELL-/bin/sh}
@@ -310,14 +314,6 @@ as_fn_exit ()
   as_fn_set_status $1
   exit $1
 } # as_fn_exit
-# as_fn_nop
-# ---------
-# Do nothing but, unlike ":", preserve the value of $?.
-as_fn_nop ()
-{
-  return $?
-}
-as_nop=as_fn_nop
 
 # as_fn_mkdir_p
 # -------------
@@ -386,11 +382,12 @@ then :
   {
     eval $1+=\$2
   }'
-else $as_nop
-  as_fn_append ()
+else case e in #(
+  e) as_fn_append ()
   {
     eval $1=\$$1\$2
-  }
+  } ;;
+esac
 fi # as_fn_append
 
 # as_fn_arith ARG...
@@ -404,21 +401,14 @@ then :
   {
     as_val=$(( $* ))
   }'
-else $as_nop
-  as_fn_arith ()
+else case e in #(
+  e) as_fn_arith ()
   {
     as_val=`expr "$@" || test $? -eq 1`
-  }
+  } ;;
+esac
 fi # as_fn_arith
 
-# as_fn_nop
-# ---------
-# Do nothing but, unlike ":", preserve the value of $?.
-as_fn_nop ()
-{
-  return $?
-}
-as_nop=as_fn_nop
 
 # as_fn_error STATUS ERROR [LINENO LOG_FD]
 # ----------------------------------------
@@ -492,6 +482,8 @@ as_cr_alnum=$as_cr_Letters$as_cr_digits
     /[$]LINENO/=
   ' <$as_myself |
     sed '
+      t clear
+      :clear
       s/[$]LINENO.*/&-/
       t lineno
       b
@@ -540,7 +532,6 @@ esac
 as_echo='printf %s\n'
 as_echo_n='printf %s'
 
-
 rm -f conf$$ conf$$.exe conf$$.file
 if test -d conf$$.dir; then
   rm -f conf$$.dir/conf$$.file
@@ -552,9 +543,9 @@ if (echo >conf$$.file) 2>/dev/null; then
   if ln -s conf$$.file conf$$ 2>/dev/null; then
     as_ln_s='ln -s'
     # ... but there are two gotchas:
-    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
-    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
-    # In both cases, we have to default to `cp -pR'.
+    # 1) On MSYS, both 'ln -s file dir' and 'ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; 'ln -s' creates a wrapper executable.
+    # In both cases, we have to default to 'cp -pR'.
     ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
       as_ln_s='cp -pR'
   elif ln conf$$.file conf$$ 2>/dev/null; then
@@ -579,10 +570,12 @@ as_test_x='test -x'
 as_executable_p=as_fn_executable_p
 
 # Sed expression to map a string onto a valid CPP name.
-as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+as_sed_cpp="y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g"
+as_tr_cpp="eval sed '$as_sed_cpp'" # deprecated
 
 # Sed expression to map a string onto a valid variable name.
-as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+as_sed_sh="y%*+%pp%;s%[^_$as_cr_alnum]%_%g"
+as_tr_sh="eval sed '$as_sed_sh'" # deprecated
 
 
 test -n "$DJDIR" || exec 7<&0 </dev/null
@@ -707,8 +700,6 @@ UNIX_FONT_OBJS
 XFT_LIBS
 XFT_CFLAGS
 XMKMF
-EGREP
-GREP
 CPP
 LDFLAGS_DEFAULT
 CFLAGS_DEFAULT
@@ -942,7 +933,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*disable-\(.*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid feature name: \`$ac_useropt'"
+      as_fn_error $? "invalid feature name: '$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -968,7 +959,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*enable-\([^=]*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid feature name: \`$ac_useropt'"
+      as_fn_error $? "invalid feature name: '$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -1181,7 +1172,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*with-\([^=]*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid package name: \`$ac_useropt'"
+      as_fn_error $? "invalid package name: '$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -1197,7 +1188,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*without-\(.*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid package name: \`$ac_useropt'"
+      as_fn_error $? "invalid package name: '$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -1227,8 +1218,8 @@ do
   | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
     x_libraries=$ac_optarg ;;
 
-  -*) as_fn_error $? "unrecognized option: \`$ac_option'
-Try \`$0 --help' for more information"
+  -*) as_fn_error $? "unrecognized option: '$ac_option'
+Try '$0 --help' for more information"
     ;;
 
   *=*)
@@ -1236,7 +1227,7 @@ Try \`$0 --help' for more information"
     # Reject names that are not valid shell variable names.
     case $ac_envvar in #(
       '' | [0-9]* | *[!_$as_cr_alnum]* )
-      as_fn_error $? "invalid variable name: \`$ac_envvar'" ;;
+      as_fn_error $? "invalid variable name: '$ac_envvar'" ;;
     esac
     eval $ac_envvar=\$ac_optarg
     export $ac_envvar ;;
@@ -1286,7 +1277,7 @@ do
   as_fn_error $? "expected an absolute directory name for --$ac_var: $ac_val"
 done
 
-# There might be people who depend on the old broken behavior: `$host'
+# There might be people who depend on the old broken behavior: '$host'
 # used to hold the argument of --host etc.
 # FIXME: To remove some day.
 build=$build_alias
@@ -1354,7 +1345,7 @@ if test ! -r "$srcdir/$ac_unique_file"; then
   test "$ac_srcdir_defaulted" = yes && srcdir="$ac_confdir or .."
   as_fn_error $? "cannot find sources ($ac_unique_file) in $srcdir"
 fi
-ac_msg="sources are in $srcdir, but \`cd $srcdir' does not work"
+ac_msg="sources are in $srcdir, but 'cd $srcdir' does not work"
 ac_abs_confdir=`(
 	cd "$srcdir" && test -r "./$ac_unique_file" || as_fn_error $? "$ac_msg"
 	pwd)`
@@ -1382,7 +1373,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures tk 8.7 to adapt to many kinds of systems.
+'configure' configures tk 8.7 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1396,11 +1387,11 @@ Configuration:
       --help=short        display options specific to this package
       --help=recursive    display the short help of all the included packages
   -V, --version           display version information and exit
-  -q, --quiet, --silent   do not print \`checking ...' messages
+  -q, --quiet, --silent   do not print 'checking ...' messages
       --cache-file=FILE   cache test results in FILE [disabled]
-  -C, --config-cache      alias for \`--cache-file=config.cache'
+  -C, --config-cache      alias for '--cache-file=config.cache'
   -n, --no-create         do not create output files
-      --srcdir=DIR        find the sources in DIR [configure dir or \`..']
+      --srcdir=DIR        find the sources in DIR [configure dir or '..']
 
 Installation directories:
   --prefix=PREFIX         install architecture-independent files in PREFIX
@@ -1408,10 +1399,10 @@ Installation directories:
   --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
                           [PREFIX]
 
-By default, \`make install' will install all the files in
-\`$ac_default_prefix/bin', \`$ac_default_prefix/lib' etc.  You can specify
-an installation prefix other than \`$ac_default_prefix' using \`--prefix',
-for instance \`--prefix=\$HOME'.
+By default, 'make install' will install all the files in
+'$ac_default_prefix/bin', '$ac_default_prefix/lib' etc.  You can specify
+an installation prefix other than '$ac_default_prefix' using '--prefix',
+for instance '--prefix=\$HOME'.
 
 For better control, use the options below.
 
@@ -1497,7 +1488,7 @@ Some influential environment variables:
   CPP         C preprocessor
   XMKMF       Path to xmkmf, Makefile generator for X Window System
 
-Use these variables to override the choices made by `configure' or to help
+Use these variables to override the choices made by 'configure' or to help
 it to find libraries and programs with nonstandard names/locations.
 
 Report bugs to the package provider.
@@ -1565,9 +1556,9 @@ test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
 tk configure 8.7
-generated by GNU Autoconf 2.71
+generated by GNU Autoconf 2.72
 
-Copyright (C) 2021 Free Software Foundation, Inc.
+Copyright (C) 2023 Free Software Foundation, Inc.
 This configure script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it.
 _ACEOF
@@ -1606,11 +1597,12 @@ printf "%s\n" "$ac_try_echo"; } >&5
        } && test -s conftest.$ac_objext
 then :
   ac_retval=0
-else $as_nop
-  printf "%s\n" "$as_me: failed program was:" >&5
+else case e in #(
+  e) printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-	ac_retval=1
+	ac_retval=1 ;;
+esac
 fi
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
@@ -1648,11 +1640,12 @@ printf "%s\n" "$ac_try_echo"; } >&5
        }
 then :
   ac_retval=0
-else $as_nop
-  printf "%s\n" "$as_me: failed program was:" >&5
+else case e in #(
+  e) printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-	ac_retval=1
+	ac_retval=1 ;;
+esac
 fi
   # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
   # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
@@ -1676,8 +1669,8 @@ printf %s "checking for $2... " >&6; }
 if eval test \${$3+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 #include <$2>
@@ -1685,10 +1678,12 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   eval "$3=yes"
-else $as_nop
-  eval "$3=no"
+else case e in #(
+  e) eval "$3=no" ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 eval ac_res=\$$3
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
@@ -1708,15 +1703,15 @@ printf %s "checking for $2... " >&6; }
 if eval test \${$3+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 /* Define $2 to an innocuous variant, in case <limits.h> declares $2.
    For example, HP-UX 11i <limits.h> declares gettimeofday.  */
 #define $2 innocuous_$2
 
 /* System header to define __stub macros and hopefully few prototypes,
-   which can conflict with char $2 (); below.  */
+   which can conflict with char $2 (void); below.  */
 
 #include <limits.h>
 #undef $2
@@ -1727,7 +1722,7 @@ else $as_nop
 #ifdef __cplusplus
 extern "C"
 #endif
-char $2 ();
+char $2 (void);
 /* The GNU C library defines this for functions which it implements
     to always fail with ENOSYS.  Some functions are actually named
     something starting with __ and the normal name is an alias.  */
@@ -1746,11 +1741,13 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   eval "$3=yes"
-else $as_nop
-  eval "$3=no"
+else case e in #(
+  e) eval "$3=no" ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
-    conftest$ac_exeext conftest.$ac_ext
+    conftest$ac_exeext conftest.$ac_ext ;;
+esac
 fi
 eval ac_res=\$$3
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
@@ -1789,12 +1786,13 @@ printf "%s\n" "$ac_try_echo"; } >&5
   test $ac_status = 0; }; }
 then :
   ac_retval=0
-else $as_nop
-  printf "%s\n" "$as_me: program exited with status $ac_status" >&5
+else case e in #(
+  e) printf "%s\n" "$as_me: program exited with status $ac_status" >&5
        printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-       ac_retval=$ac_status
+       ac_retval=$ac_status ;;
+esac
 fi
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
@@ -1829,11 +1827,12 @@ printf "%s\n" "$ac_try_echo"; } >&5
        }
 then :
   ac_retval=0
-else $as_nop
-  printf "%s\n" "$as_me: failed program was:" >&5
+else case e in #(
+  e) printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-    ac_retval=1
+    ac_retval=1 ;;
+esac
 fi
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
@@ -1852,8 +1851,8 @@ printf %s "checking for $2... " >&6; }
 if eval test \${$3+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  eval "$3=no"
+else case e in #(
+  e) eval "$3=no"
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
@@ -1883,12 +1882,14 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
-else $as_nop
-  eval "$3=yes"
+else case e in #(
+  e) eval "$3=yes" ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 eval ac_res=\$$3
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
@@ -1921,7 +1922,7 @@ This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
 It was created by tk $as_me 8.7, which was
-generated by GNU Autoconf 2.71.  Invocation command line was
+generated by GNU Autoconf 2.72.  Invocation command line was
 
   $ $0$ac_configure_args_raw
 
@@ -2167,10 +2168,10 @@ esac
 printf "%s\n" "$as_me: loading site script $ac_site_file" >&6;}
     sed 's/^/| /' "$ac_site_file" >&5
     . "$ac_site_file" \
-      || { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+      || { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "failed to load site script $ac_site_file
-See \`config.log' for more details" "$LINENO" 5; }
+See 'config.log' for more details" "$LINENO" 5; }
   fi
 done
 
@@ -2206,9 +2207,7 @@ struct stat;
 /* Most of the following tests are stolen from RCS 5.7 src/conf.sh.  */
 struct buf { int x; };
 struct buf * (*rcsopen) (struct buf *, struct stat *, int);
-static char *e (p, i)
-     char **p;
-     int i;
+static char *e (char **p, int i)
 {
   return p[i];
 }
@@ -2222,6 +2221,21 @@ static char *f (char * (*g) (char **, int), char **p, ...)
   return s;
 }
 
+/* C89 style stringification. */
+#define noexpand_stringify(a) #a
+const char *stringified = noexpand_stringify(arbitrary+token=sequence);
+
+/* C89 style token pasting.  Exercises some of the corner cases that
+   e.g. old MSVC gets wrong, but not very hard. */
+#define noexpand_concat(a,b) a##b
+#define expand_concat(a,b) noexpand_concat(a,b)
+extern int vA;
+extern int vbee;
+#define aye A
+#define bee B
+int *pvA = &expand_concat(v,aye);
+int *pvbee = &noexpand_concat(v,bee);
+
 /* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
    function prototypes and stuff, but not \xHH hex character constants.
    These do not provoke an error unfortunately, instead are silently treated
@@ -2249,16 +2263,19 @@ ok |= (argc == 0 || f (e, argv, 0) != argv[0] || f (e, argv, 1) != argv[1]);
 
 # Test code for whether the C compiler supports C99 (global declarations)
 ac_c_conftest_c99_globals='
-// Does the compiler advertise C99 conformance?
+/* Does the compiler advertise C99 conformance? */
 #if !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L
 # error "Compiler does not advertise C99 conformance"
 #endif
 
+// See if C++-style comments work.
+
 #include <stdbool.h>
 extern int puts (const char *);
 extern int printf (const char *, ...);
 extern int dprintf (int, const char *, ...);
 extern void *malloc (size_t);
+extern void free (void *);
 
 // Check varargs macros.  These examples are taken from C99 6.10.3.5.
 // dprintf is used instead of fprintf to avoid needing to declare
@@ -2308,7 +2325,6 @@ typedef const char *ccp;
 static inline int
 test_restrict (ccp restrict text)
 {
-  // See if C++-style comments work.
   // Iterate through items via the restricted pointer.
   // Also check for declarations in for loops.
   for (unsigned int i = 0; *(text+i) != '\''\0'\''; ++i)
@@ -2374,6 +2390,8 @@ ac_c_conftest_c99_main='
   ia->datasize = 10;
   for (int i = 0; i < ia->datasize; ++i)
     ia->data[i] = i * 1.234;
+  // Work around memory leak warnings.
+  free (ia);
 
   // Check named initializers.
   struct named_init ni = {
@@ -2395,7 +2413,7 @@ ac_c_conftest_c99_main='
 
 # Test code for whether the C compiler supports C11 (global declarations)
 ac_c_conftest_c11_globals='
-// Does the compiler advertise C11 conformance?
+/* Does the compiler advertise C11 conformance? */
 #if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112L
 # error "Compiler does not advertise C11 conformance"
 #endif
@@ -2519,12 +2537,12 @@ for ac_var in $ac_precious_vars; do
   eval ac_new_val=\$ac_env_${ac_var}_value
   case $ac_old_set,$ac_new_set in
     set,)
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
-printf "%s\n" "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: '$ac_var' was set to '$ac_old_val' in the previous run" >&5
+printf "%s\n" "$as_me: error: '$ac_var' was set to '$ac_old_val' in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,set)
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was not set in the previous run" >&5
-printf "%s\n" "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: '$ac_var' was not set in the previous run" >&5
+printf "%s\n" "$as_me: error: '$ac_var' was not set in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,);;
     *)
@@ -2533,18 +2551,18 @@ printf "%s\n" "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
 	ac_old_val_w=`echo x $ac_old_val`
 	ac_new_val_w=`echo x $ac_new_val`
 	if test "$ac_old_val_w" != "$ac_new_val_w"; then
-	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' has changed since the previous run:" >&5
-printf "%s\n" "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: '$ac_var' has changed since the previous run:" >&5
+printf "%s\n" "$as_me: error: '$ac_var' has changed since the previous run:" >&2;}
 	  ac_cache_corrupted=:
 	else
-	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&5
-printf "%s\n" "$as_me: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&2;}
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in '$ac_var' since the previous run:" >&5
+printf "%s\n" "$as_me: warning: ignoring whitespace changes in '$ac_var' since the previous run:" >&2;}
 	  eval $ac_var=\$ac_old_val
 	fi
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   former value:  \`$ac_old_val'" >&5
-printf "%s\n" "$as_me:   former value:  \`$ac_old_val'" >&2;}
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   current value: \`$ac_new_val'" >&5
-printf "%s\n" "$as_me:   current value: \`$ac_new_val'" >&2;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   former value:  '$ac_old_val'" >&5
+printf "%s\n" "$as_me:   former value:  '$ac_old_val'" >&2;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   current value: '$ac_new_val'" >&5
+printf "%s\n" "$as_me:   current value: '$ac_new_val'" >&2;}
       fi;;
   esac
   # Pass precious variables to config.status.
@@ -2560,11 +2578,11 @@ printf "%s\n" "$as_me:   current value: \`$ac_new_val'" >&2;}
   fi
 done
 if $ac_cache_corrupted; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
 printf "%s\n" "$as_me: error: changes in the environment can compromise the build" >&2;}
-  as_fn_error $? "run \`${MAKE-make} distclean' and/or \`rm $cache_file'
+  as_fn_error $? "run '${MAKE-make} distclean' and/or 'rm $cache_file'
 	    and start over" "$LINENO" 5
 fi
 ## -------------------- ##
@@ -2615,8 +2633,8 @@ printf %s "checking for Tcl configuration... " >&6; }
 	if test ${ac_cv_c_tclconfig+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 
 	    # First check to see if --with-tcl was specified.
 	    if test x"${with_tclconfig}" != x ; then
@@ -2704,7 +2722,8 @@ printf "%s\n" "$as_me: WARNING: --with-tcl argument should refer to directory co
 		    fi
 		done
 	    fi
-
+	 ;;
+esac
 fi
 
 
@@ -2796,8 +2815,8 @@ printf %s "checking for tclsh... " >&6; }
     if test ${ac_cv_path_tclsh+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	search_path=`echo ${PATH} | sed -e 's/:/ /g'`
 	for dir in $search_path ; do
 	    for j in `ls -r $dir/tclsh[8-9]* 2> /dev/null` \
@@ -2810,7 +2829,8 @@ else $as_nop
 		fi
 	    done
 	done
-
+     ;;
+esac
 fi
 
 
@@ -2860,8 +2880,9 @@ printf %s "checking whether to use symlinks for manpages... " >&6; }
 if test ${enable_man_symlinks+y}
 then :
   enableval=$enable_man_symlinks; test "$enableval" != "no" && MAN_FLAGS="$MAN_FLAGS --symlinks"
-else $as_nop
-  enableval="no"
+else case e in #(
+  e) enableval="no" ;;
+esac
 fi
 
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $enableval" >&5
@@ -2877,8 +2898,9 @@ then :
 	    no)  ;;
 	    *)   MAN_FLAGS="$MAN_FLAGS --compress $enableval";;
 	esac
-else $as_nop
-  enableval="no"
+else case e in #(
+  e) enableval="no" ;;
+esac
 fi
 
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $enableval" >&5
@@ -2905,8 +2927,9 @@ then :
 	    no)  ;;
 	    *)   MAN_FLAGS="$MAN_FLAGS --suffix $enableval";;
 	esac
-else $as_nop
-  enableval="no"
+else case e in #(
+  e) enableval="no" ;;
+esac
 fi
 
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $enableval" >&5
@@ -2947,8 +2970,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$CC"; then
+else case e in #(
+  e) if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2970,7 +2993,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -2992,8 +3016,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_CC"; then
+else case e in #(
+  e) if test -n "$ac_ct_CC"; then
   ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -3015,7 +3039,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
@@ -3050,8 +3075,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$CC"; then
+else case e in #(
+  e) if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -3073,7 +3098,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -3095,8 +3121,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$CC"; then
+else case e in #(
+  e) if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
   ac_prog_rejected=no
@@ -3135,7 +3161,8 @@ if test $ac_prog_rejected = yes; then
     ac_cv_prog_CC="$as_dir$ac_word${1+' '}$@"
   fi
 fi
-fi
+fi ;;
+esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -3159,8 +3186,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$CC"; then
+else case e in #(
+  e) if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -3182,7 +3209,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -3208,8 +3236,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_CC"; then
+else case e in #(
+  e) if test -n "$ac_ct_CC"; then
   ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -3231,7 +3259,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
@@ -3269,8 +3298,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$CC"; then
+else case e in #(
+  e) if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -3292,7 +3321,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -3314,8 +3344,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_CC"; then
+else case e in #(
+  e) if test -n "$ac_ct_CC"; then
   ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -3337,7 +3367,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
@@ -3366,10 +3397,10 @@ fi
 fi
 
 
-test -z "$CC" && { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+test -z "$CC" && { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "no acceptable C compiler found in \$PATH
-See \`config.log' for more details" "$LINENO" 5; }
+See 'config.log' for more details" "$LINENO" 5; }
 
 # Provide some information about the compiler.
 printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
@@ -3441,8 +3472,8 @@ printf "%s\n" "$ac_try_echo"; } >&5
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 then :
-  # Autoconf-2.13 could set the ac_cv_exeext variable to `no'.
-# So ignore a value of `no', otherwise this would lead to `EXEEXT = no'
+  # Autoconf-2.13 could set the ac_cv_exeext variable to 'no'.
+# So ignore a value of 'no', otherwise this would lead to 'EXEEXT = no'
 # in a Makefile.  We should not override ac_cv_exeext if it was cached,
 # so that the user can short-circuit this test for compilers unknown to
 # Autoconf.
@@ -3462,7 +3493,7 @@ do
 	   ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
 	fi
 	# We set ac_cv_exeext here because the later test for it is not
-	# safe: cross compilers may not add the suffix if given an `-o'
+	# safe: cross compilers may not add the suffix if given an '-o'
 	# argument, so we may need to know it at that point already.
 	# Even if this section looks crufty: it has the advantage of
 	# actually working.
@@ -3473,8 +3504,9 @@ do
 done
 test "$ac_cv_exeext" = no && ac_cv_exeext=
 
-else $as_nop
-  ac_file=''
+else case e in #(
+  e) ac_file='' ;;
+esac
 fi
 if test -z "$ac_file"
 then :
@@ -3483,13 +3515,14 @@ printf "%s\n" "no" >&6; }
 printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error 77 "C compiler cannot create executables
-See \`config.log' for more details" "$LINENO" 5; }
-else $as_nop
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; }
+See 'config.log' for more details" "$LINENO" 5; }
+else case e in #(
+  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; } ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
 printf %s "checking for C compiler default output file name... " >&6; }
@@ -3513,10 +3546,10 @@ printf "%s\n" "$ac_try_echo"; } >&5
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 then :
-  # If both `conftest.exe' and `conftest' are `present' (well, observable)
-# catch `conftest.exe'.  For instance with Cygwin, `ls conftest' will
-# work properly (i.e., refer to `conftest.exe'), while it won't with
-# `rm'.
+  # If both 'conftest.exe' and 'conftest' are 'present' (well, observable)
+# catch 'conftest.exe'.  For instance with Cygwin, 'ls conftest' will
+# work properly (i.e., refer to 'conftest.exe'), while it won't with
+# 'rm'.
 for ac_file in conftest.exe conftest conftest.*; do
   test -f "$ac_file" || continue
   case $ac_file in
@@ -3526,11 +3559,12 @@ for ac_file in conftest.exe conftest conftest.*; do
     * ) break;;
   esac
 done
-else $as_nop
-  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+else case e in #(
+  e) { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of executables: cannot compile and link
-See \`config.log' for more details" "$LINENO" 5; }
+See 'config.log' for more details" "$LINENO" 5; } ;;
+esac
 fi
 rm -f conftest conftest$ac_cv_exeext
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
@@ -3546,6 +3580,8 @@ int
 main (void)
 {
 FILE *f = fopen ("conftest.out", "w");
+ if (!f)
+  return 1;
  return ferror (f) || fclose (f) != 0;
 
   ;
@@ -3585,26 +3621,27 @@ printf "%s\n" "$ac_try_echo"; } >&5
     if test "$cross_compiling" = maybe; then
 	cross_compiling=yes
     else
-	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error 77 "cannot run C compiled programs.
-If you meant to cross compile, use \`--host'.
-See \`config.log' for more details" "$LINENO" 5; }
+If you meant to cross compile, use '--host'.
+See 'config.log' for more details" "$LINENO" 5; }
     fi
   fi
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
 printf "%s\n" "$cross_compiling" >&6; }
 
-rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
+rm -f conftest.$ac_ext conftest$ac_cv_exeext \
+  conftest.o conftest.obj conftest.out
 ac_clean_files=$ac_clean_files_save
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
 printf %s "checking for suffix of object files... " >&6; }
 if test ${ac_cv_objext+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -3636,16 +3673,18 @@ then :
        break;;
   esac
 done
-else $as_nop
-  printf "%s\n" "$as_me: failed program was:" >&5
+else case e in #(
+  e) printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of object files: cannot compile
-See \`config.log' for more details" "$LINENO" 5; }
+See 'config.log' for more details" "$LINENO" 5; } ;;
+esac
 fi
-rm -f conftest.$ac_cv_objext conftest.$ac_ext
+rm -f conftest.$ac_cv_objext conftest.$ac_ext ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
 printf "%s\n" "$ac_cv_objext" >&6; }
@@ -3656,8 +3695,8 @@ printf %s "checking whether the compiler supports GNU C... " >&6; }
 if test ${ac_cv_c_compiler_gnu+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -3674,12 +3713,14 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_compiler_gnu=yes
-else $as_nop
-  ac_compiler_gnu=no
+else case e in #(
+  e) ac_compiler_gnu=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 ac_cv_c_compiler_gnu=$ac_compiler_gnu
-
+ ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
 printf "%s\n" "$ac_cv_c_compiler_gnu" >&6; }
@@ -3697,8 +3738,8 @@ printf %s "checking whether $CC accepts -g... " >&6; }
 if test ${ac_cv_prog_cc_g+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_save_c_werror_flag=$ac_c_werror_flag
+else case e in #(
+  e) ac_save_c_werror_flag=$ac_c_werror_flag
    ac_c_werror_flag=yes
    ac_cv_prog_cc_g=no
    CFLAGS="-g"
@@ -3716,8 +3757,8 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_prog_cc_g=yes
-else $as_nop
-  CFLAGS=""
+else case e in #(
+  e) CFLAGS=""
       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -3732,8 +3773,8 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
-else $as_nop
-  ac_c_werror_flag=$ac_save_c_werror_flag
+else case e in #(
+  e) ac_c_werror_flag=$ac_save_c_werror_flag
 	 CFLAGS="-g"
 	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3750,12 +3791,15 @@ if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_prog_cc_g=yes
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-   ac_c_werror_flag=$ac_save_c_werror_flag
+   ac_c_werror_flag=$ac_save_c_werror_flag ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
 printf "%s\n" "$ac_cv_prog_cc_g" >&6; }
@@ -3782,8 +3826,8 @@ printf %s "checking for $CC option to enable C11 features... " >&6; }
 if test ${ac_cv_prog_cc_c11+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_cv_prog_cc_c11=no
+else case e in #(
+  e) ac_cv_prog_cc_c11=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3800,25 +3844,28 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c11" != "xno" && break
 done
 rm -f conftest.$ac_ext
-CC=$ac_save_CC
+CC=$ac_save_CC ;;
+esac
 fi
 
 if test "x$ac_cv_prog_cc_c11" = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
 printf "%s\n" "unsupported" >&6; }
-else $as_nop
-  if test "x$ac_cv_prog_cc_c11" = x
+else case e in #(
+  e) if test "x$ac_cv_prog_cc_c11" = x
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
 printf "%s\n" "none needed" >&6; }
-else $as_nop
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
+else case e in #(
+  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
 printf "%s\n" "$ac_cv_prog_cc_c11" >&6; }
-     CC="$CC $ac_cv_prog_cc_c11"
+     CC="$CC $ac_cv_prog_cc_c11" ;;
+esac
 fi
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c11
-  ac_prog_cc_stdc=c11
+  ac_prog_cc_stdc=c11 ;;
+esac
 fi
 fi
 if test x$ac_prog_cc_stdc = xno
@@ -3828,8 +3875,8 @@ printf %s "checking for $CC option to enable C99 features... " >&6; }
 if test ${ac_cv_prog_cc_c99+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_cv_prog_cc_c99=no
+else case e in #(
+  e) ac_cv_prog_cc_c99=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3846,25 +3893,28 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c99" != "xno" && break
 done
 rm -f conftest.$ac_ext
-CC=$ac_save_CC
+CC=$ac_save_CC ;;
+esac
 fi
 
 if test "x$ac_cv_prog_cc_c99" = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
 printf "%s\n" "unsupported" >&6; }
-else $as_nop
-  if test "x$ac_cv_prog_cc_c99" = x
+else case e in #(
+  e) if test "x$ac_cv_prog_cc_c99" = x
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
 printf "%s\n" "none needed" >&6; }
-else $as_nop
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
+else case e in #(
+  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
 printf "%s\n" "$ac_cv_prog_cc_c99" >&6; }
-     CC="$CC $ac_cv_prog_cc_c99"
+     CC="$CC $ac_cv_prog_cc_c99" ;;
+esac
 fi
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c99
-  ac_prog_cc_stdc=c99
+  ac_prog_cc_stdc=c99 ;;
+esac
 fi
 fi
 if test x$ac_prog_cc_stdc = xno
@@ -3874,8 +3924,8 @@ printf %s "checking for $CC option to enable C89 features... " >&6; }
 if test ${ac_cv_prog_cc_c89+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_cv_prog_cc_c89=no
+else case e in #(
+  e) ac_cv_prog_cc_c89=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3892,25 +3942,28 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c89" != "xno" && break
 done
 rm -f conftest.$ac_ext
-CC=$ac_save_CC
+CC=$ac_save_CC ;;
+esac
 fi
 
 if test "x$ac_cv_prog_cc_c89" = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
 printf "%s\n" "unsupported" >&6; }
-else $as_nop
-  if test "x$ac_cv_prog_cc_c89" = x
+else case e in #(
+  e) if test "x$ac_cv_prog_cc_c89" = x
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
 printf "%s\n" "none needed" >&6; }
-else $as_nop
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+else case e in #(
+  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
 printf "%s\n" "$ac_cv_prog_cc_c89" >&6; }
-     CC="$CC $ac_cv_prog_cc_c89"
+     CC="$CC $ac_cv_prog_cc_c89" ;;
+esac
 fi
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c89
-  ac_prog_cc_stdc=c89
+  ac_prog_cc_stdc=c89 ;;
+esac
 fi
 fi
 
@@ -3926,8 +3979,8 @@ printf %s "checking for inline... " >&6; }
 if test ${ac_cv_c_inline+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_cv_c_inline=no
+else case e in #(
+  e) ac_cv_c_inline=no
 for ac_kw in inline __inline__ __inline; do
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3945,7 +3998,8 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   test "$ac_cv_c_inline" != no && break
 done
-
+ ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_inline" >&5
 printf "%s\n" "$ac_cv_c_inline" >&6; }
@@ -3977,8 +4031,8 @@ printf %s "checking if the compiler understands -pipe... " >&6; }
 if test ${tcl_cv_cc_pipe+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -pipe"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3994,11 +4048,13 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_cc_pipe=yes
-else $as_nop
-  tcl_cv_cc_pipe=no
+else case e in #(
+  e) tcl_cv_cc_pipe=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-	CFLAGS=$hold_cflags
+	CFLAGS=$hold_cflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cc_pipe" >&5
 printf "%s\n" "$tcl_cv_cc_pipe" >&6; }
@@ -4038,8 +4094,9 @@ printf %s "checking how to build libraries... " >&6; }
 if test ${enable_shared+y}
 then :
   enableval=$enable_shared; tcl_ok=$enableval
-else $as_nop
-  tcl_ok=yes
+else case e in #(
+  e) tcl_ok=yes ;;
+esac
 fi
 
     if test "$tcl_ok" = "yes" ; then
@@ -4071,8 +4128,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_RANLIB+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$RANLIB"; then
+else case e in #(
+  e) if test -n "$RANLIB"; then
   ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -4094,7 +4151,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 RANLIB=$ac_cv_prog_RANLIB
 if test -n "$RANLIB"; then
@@ -4116,8 +4174,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_RANLIB+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_RANLIB"; then
+else case e in #(
+  e) if test -n "$ac_ct_RANLIB"; then
   ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -4139,7 +4197,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB
 if test -n "$ac_ct_RANLIB"; then
@@ -4204,8 +4263,9 @@ printf %s "checking if 64bit support is requested... " >&6; }
 if test ${enable_64bit+y}
 then :
   enableval=$enable_64bit; do64bit=$enableval
-else $as_nop
-  do64bit=no
+else case e in #(
+  e) do64bit=no ;;
+esac
 fi
 
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $do64bit" >&5
@@ -4219,8 +4279,9 @@ printf %s "checking if 64bit Sparc VIS support is requested... " >&6; }
 if test ${enable_64bit_vis+y}
 then :
   enableval=$enable_64bit_vis; do64bitVIS=$enableval
-else $as_nop
-  do64bitVIS=no
+else case e in #(
+  e) do64bitVIS=no ;;
+esac
 fi
 
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $do64bitVIS" >&5
@@ -4239,8 +4300,8 @@ printf %s "checking if compiler supports visibility \"hidden\"... " >&6; }
 if test ${tcl_cv_cc_visibility_hidden+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -Werror"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -4258,12 +4319,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   tcl_cv_cc_visibility_hidden=yes
-else $as_nop
-  tcl_cv_cc_visibility_hidden=no
+else case e in #(
+  e) tcl_cv_cc_visibility_hidden=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-	CFLAGS=$hold_cflags
+	CFLAGS=$hold_cflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cc_visibility_hidden" >&5
 printf "%s\n" "$tcl_cv_cc_visibility_hidden" >&6; }
@@ -4287,8 +4350,9 @@ printf %s "checking if rpath support is requested... " >&6; }
 if test ${enable_rpath+y}
 then :
   enableval=$enable_rpath; doRpath=$enableval
-else $as_nop
-  doRpath=yes
+else case e in #(
+  e) doRpath=yes ;;
+esac
 fi
 
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $doRpath" >&5
@@ -4303,8 +4367,8 @@ printf %s "checking system version... " >&6; }
 if test ${tcl_cv_sys_version+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	if test "${TEA_PLATFORM}" = "windows" ; then
 	    tcl_cv_sys_version=windows
 	else
@@ -4322,7 +4386,8 @@ printf "%s\n" "$as_me: WARNING: can't find uname command" >&2;}
 		fi
 	    fi
 	fi
-
+     ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_sys_version" >&5
 printf "%s\n" "$tcl_cv_sys_version" >&6; }
@@ -4337,16 +4402,22 @@ printf %s "checking for dlopen in -ldl... " >&6; }
 if test ${ac_cv_lib_dl_dlopen+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
+else case e in #(
+  e) ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldl  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char dlopen ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char dlopen (void);
 int
 main (void)
 {
@@ -4358,20 +4429,23 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_dl_dlopen=yes
-else $as_nop
-  ac_cv_lib_dl_dlopen=no
+else case e in #(
+  e) ac_cv_lib_dl_dlopen=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
+LIBS=$ac_check_lib_save_LIBS ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dl_dlopen" >&5
 printf "%s\n" "$ac_cv_lib_dl_dlopen" >&6; }
 if test "x$ac_cv_lib_dl_dlopen" = xyes
 then :
   have_dl=yes
-else $as_nop
-  have_dl=no
+else case e in #(
+  e) have_dl=no ;;
+esac
 fi
 
 
@@ -4408,11 +4482,12 @@ then :
 	esac
 
 
-else $as_nop
-
+else case e in #(
+  e)
 	CFLAGS_OPTIMIZE=-O
 	CFLAGS_WARNING=""
-
+     ;;
+esac
 fi
     if test -n "$ac_tool_prefix"; then
   # Extract the first word of "${ac_tool_prefix}ar", so it can be a program name with args.
@@ -4422,8 +4497,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_AR+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$AR"; then
+else case e in #(
+  e) if test -n "$AR"; then
   ac_cv_prog_AR="$AR" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -4445,7 +4520,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 AR=$ac_cv_prog_AR
 if test -n "$AR"; then
@@ -4467,8 +4543,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_AR+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_AR"; then
+else case e in #(
+  e) if test -n "$ac_ct_AR"; then
   ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -4490,7 +4566,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 ac_ct_AR=$ac_cv_prog_ac_ct_AR
 if test -n "$ac_ct_AR"; then
@@ -4565,15 +4642,16 @@ then :
 		    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: 64bit mode not supported with GCC on $system" >&5
 printf "%s\n" "$as_me: WARNING: 64bit mode not supported with GCC on $system" >&2;}
 
-else $as_nop
-
+else case e in #(
+  e)
 		    do64bit_ok=yes
 		    CFLAGS="$CFLAGS -q64"
 		    LDFLAGS_ARCH="-q64"
 		    RANLIB="${RANLIB} -X64"
 		    AR="${AR} -X64"
 		    SHLIB_LD_FLAGS="-b64"
-
+		 ;;
+esac
 fi
 
 fi
@@ -4590,31 +4668,34 @@ then :
 
 		    CC_SEARCH_FLAGS='-Wl,-R,${LIB_RUNTIME_DIR}'
 
-else $as_nop
-
+else case e in #(
+  e)
 		    CC_SEARCH_FLAGS='-R${LIB_RUNTIME_DIR}'
-
+		 ;;
+esac
 fi
 		LD_SEARCH_FLAGS='-R ${LIB_RUNTIME_DIR}'
 
-else $as_nop
-
+else case e in #(
+  e)
 		if test "$GCC" = yes
 then :
 
 		    SHLIB_LD='${CC} -shared -Wl,-bexpall'
 
-else $as_nop
-
+else case e in #(
+  e)
 		    SHLIB_LD="/bin/ld -bhalt:4 -bM:SRE -bexpall -H512 -T512 -bnoentry"
 		    LDFLAGS="$LDFLAGS -brtl"
-
+		 ;;
+esac
 fi
 		SHLIB_LD="${SHLIB_LD} ${SHLIB_LD_FLAGS}"
 		DL_LIBS="-ldl"
 		CC_SEARCH_FLAGS='-L${LIB_RUNTIME_DIR}'
 		LD_SEARCH_FLAGS=${CC_SEARCH_FLAGS}
-
+	     ;;
+esac
 fi
 	    ;;
 	BeOS*)
@@ -4634,16 +4715,22 @@ printf %s "checking for inet_ntoa in -lbind... " >&6; }
 if test ${ac_cv_lib_bind_inet_ntoa+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
+else case e in #(
+  e) ac_check_lib_save_LIBS=$LIBS
 LIBS="-lbind  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char inet_ntoa ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char inet_ntoa (void);
 int
 main (void)
 {
@@ -4655,12 +4742,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_bind_inet_ntoa=yes
-else $as_nop
-  ac_cv_lib_bind_inet_ntoa=no
+else case e in #(
+  e) ac_cv_lib_bind_inet_ntoa=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
+LIBS=$ac_check_lib_save_LIBS ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_bind_inet_ntoa" >&5
 printf "%s\n" "$ac_cv_lib_bind_inet_ntoa" >&6; }
@@ -4704,8 +4793,8 @@ printf %s "checking for Cygwin version of gcc... " >&6; }
 if test ${ac_cv_cygwin+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 		#ifdef __CYGWIN__
@@ -4723,11 +4812,13 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_cygwin=no
-else $as_nop
-  ac_cv_cygwin=yes
+else case e in #(
+  e) ac_cv_cygwin=yes ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-
+	     ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_cygwin" >&5
 printf "%s\n" "$ac_cv_cygwin" >&6; }
@@ -4767,16 +4858,22 @@ printf %s "checking for inet_ntoa in -lnetwork... " >&6; }
 if test ${ac_cv_lib_network_inet_ntoa+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
+else case e in #(
+  e) ac_check_lib_save_LIBS=$LIBS
 LIBS="-lnetwork  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char inet_ntoa ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char inet_ntoa (void);
 int
 main (void)
 {
@@ -4788,12 +4885,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_network_inet_ntoa=yes
-else $as_nop
-  ac_cv_lib_network_inet_ntoa=no
+else case e in #(
+  e) ac_cv_lib_network_inet_ntoa=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
+LIBS=$ac_check_lib_save_LIBS ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_network_inet_ntoa" >&5
 printf "%s\n" "$ac_cv_lib_network_inet_ntoa" >&6; }
@@ -4818,26 +4917,33 @@ then :
 
 		SHLIB_SUFFIX=".so"
 
-else $as_nop
-
+else case e in #(
+  e)
 		SHLIB_SUFFIX=".sl"
-
+	     ;;
+esac
 fi
 	    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for shl_load in -ldld" >&5
 printf %s "checking for shl_load in -ldld... " >&6; }
 if test ${ac_cv_lib_dld_shl_load+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
+else case e in #(
+  e) ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldld  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char shl_load ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char shl_load (void);
 int
 main (void)
 {
@@ -4849,20 +4955,23 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_dld_shl_load=yes
-else $as_nop
-  ac_cv_lib_dld_shl_load=no
+else case e in #(
+  e) ac_cv_lib_dld_shl_load=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
+LIBS=$ac_check_lib_save_LIBS ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_shl_load" >&5
 printf "%s\n" "$ac_cv_lib_dld_shl_load" >&6; }
 if test "x$ac_cv_lib_dld_shl_load" = xyes
 then :
   tcl_ok=yes
-else $as_nop
-  tcl_ok=no
+else case e in #(
+  e) tcl_ok=no ;;
+esac
 fi
 
 	    if test "$tcl_ok" = yes
@@ -4884,10 +4993,11 @@ then :
 		SHLIB_LD='${CC} -shared'
 		LD_SEARCH_FLAGS=${CC_SEARCH_FLAGS}
 
-else $as_nop
-
+else case e in #(
+  e)
 		CFLAGS="$CFLAGS -z"
-
+	     ;;
+esac
 fi
 
 	    # Users may want PA-RISC 1.1/2.0 portable code - needs HP cc
@@ -4918,12 +5028,13 @@ printf "%s\n" "$as_me: WARNING: 64bit mode not supported with GCC on $system" >&
 			    ;;
 		    esac
 
-else $as_nop
-
+else case e in #(
+  e)
 		    do64bit_ok=yes
 		    CFLAGS="$CFLAGS +DD64"
 		    LDFLAGS_ARCH="+DD64"
-
+		 ;;
+esac
 fi
 
 fi ;;
@@ -4934,16 +5045,22 @@ printf %s "checking for shl_load in -ldld... " >&6; }
 if test ${ac_cv_lib_dld_shl_load+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
+else case e in #(
+  e) ac_check_lib_save_LIBS=$LIBS
 LIBS="-ldld  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char shl_load ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char shl_load (void);
 int
 main (void)
 {
@@ -4955,20 +5072,23 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_dld_shl_load=yes
-else $as_nop
-  ac_cv_lib_dld_shl_load=no
+else case e in #(
+  e) ac_cv_lib_dld_shl_load=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
+LIBS=$ac_check_lib_save_LIBS ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_dld_shl_load" >&5
 printf "%s\n" "$ac_cv_lib_dld_shl_load" >&6; }
 if test "x$ac_cv_lib_dld_shl_load" = xyes
 then :
   tcl_ok=yes
-else $as_nop
-  tcl_ok=no
+else case e in #(
+  e) tcl_ok=no ;;
+esac
 fi
 
 	    if test "$tcl_ok" = yes
@@ -5028,8 +5148,8 @@ then :
 		CFLAGS="$CFLAGS -mabi=n32"
 		LDFLAGS="$LDFLAGS -mabi=n32"
 
-else $as_nop
-
+else case e in #(
+  e)
 		case $system in
 		    IRIX-6.3)
 			# Use to build 6.2 compatible binaries on 6.3.
@@ -5040,7 +5160,8 @@ else $as_nop
 			;;
 		esac
 		LDFLAGS="$LDFLAGS -n32"
-
+	     ;;
+esac
 fi
 	    ;;
 	IRIX64-6.*)
@@ -5073,13 +5194,14 @@ then :
 	            { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: 64bit mode not supported by gcc" >&5
 printf "%s\n" "$as_me: WARNING: 64bit mode not supported by gcc" >&2;}
 
-else $as_nop
-
+else case e in #(
+  e)
 	            do64bit_ok=yes
 	            SHLIB_LD="ld -64 -shared -rdata_shared"
 	            CFLAGS="$CFLAGS -64"
 	            LDFLAGS_ARCH="-64"
-
+	         ;;
+esac
 fi
 
 fi
@@ -5130,8 +5252,8 @@ printf %s "checking if compiler accepts -m64 flag... " >&6; }
 if test ${tcl_cv_cc_m64+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 		    hold_cflags=$CFLAGS
 		    CFLAGS="$CFLAGS -m64"
 		    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -5148,12 +5270,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   tcl_cv_cc_m64=yes
-else $as_nop
-  tcl_cv_cc_m64=no
+else case e in #(
+  e) tcl_cv_cc_m64=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-		    CFLAGS=$hold_cflags
+		    CFLAGS=$hold_cflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cc_m64" >&5
 printf "%s\n" "$tcl_cv_cc_m64" >&6; }
@@ -5265,8 +5389,8 @@ printf %s "checking if compiler accepts -arch ppc64 flag... " >&6; }
 if test ${tcl_cv_cc_arch_ppc64+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 			    hold_cflags=$CFLAGS
 			    CFLAGS="$CFLAGS -arch ppc64 -mpowerpc64 -mcpu=G5"
 			    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -5283,12 +5407,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   tcl_cv_cc_arch_ppc64=yes
-else $as_nop
-  tcl_cv_cc_arch_ppc64=no
+else case e in #(
+  e) tcl_cv_cc_arch_ppc64=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-			    CFLAGS=$hold_cflags
+			    CFLAGS=$hold_cflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cc_arch_ppc64" >&5
 printf "%s\n" "$tcl_cv_cc_arch_ppc64" >&6; }
@@ -5305,8 +5431,8 @@ printf %s "checking if compiler accepts -arch x86_64 flag... " >&6; }
 if test ${tcl_cv_cc_arch_x86_64+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 			    hold_cflags=$CFLAGS
 			    CFLAGS="$CFLAGS -arch x86_64"
 			    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -5323,12 +5449,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   tcl_cv_cc_arch_x86_64=yes
-else $as_nop
-  tcl_cv_cc_arch_x86_64=no
+else case e in #(
+  e) tcl_cv_cc_arch_x86_64=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-			    CFLAGS=$hold_cflags
+			    CFLAGS=$hold_cflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cc_arch_x86_64" >&5
 printf "%s\n" "$tcl_cv_cc_arch_x86_64" >&6; }
@@ -5345,8 +5473,8 @@ printf %s "checking if compiler accepts -arch arm64 flag... " >&6; }
 if test ${tcl_cv_cc_arch_arm64+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 			    hold_cflags=$CFLAGS
 			    CFLAGS="$CFLAGS -arch arm64"
 			    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -5363,12 +5491,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   tcl_cv_cc_arch_arm64=yes
-else $as_nop
-  tcl_cv_cc_arch_arm64=no
+else case e in #(
+  e) tcl_cv_cc_arch_arm64=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-			    CFLAGS=$hold_cflags
+			    CFLAGS=$hold_cflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cc_arch_arm64" >&5
 printf "%s\n" "$tcl_cv_cc_arch_arm64" >&6; }
@@ -5384,8 +5514,8 @@ fi;;
 printf "%s\n" "$as_me: WARNING: Don't know how enable 64-bit on architecture \`arch\`" >&2;};;
 		esac
 
-else $as_nop
-
+else case e in #(
+  e)
 		# Check for combined 32-bit and 64-bit fat build
 		if echo "$CFLAGS " |grep -E -q -- '-arch (ppc64|x86_64|arm64) ' \
 		    && echo "$CFLAGS " |grep -E -q -- '-arch (ppc|i386) '
@@ -5393,7 +5523,8 @@ then :
 
 		    fat_32_64=yes
 fi
-
+	     ;;
+esac
 fi
 	    SHLIB_LD='${CC} -dynamiclib ${CFLAGS} ${LDFLAGS}'
 	    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking if ld accepts -single_module flag" >&5
@@ -5401,8 +5532,8 @@ printf %s "checking if ld accepts -single_module flag... " >&6; }
 if test ${tcl_cv_ld_single_module+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 		hold_ldflags=$LDFLAGS
 		LDFLAGS="$LDFLAGS -dynamiclib -Wl,-single_module"
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -5419,12 +5550,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   tcl_cv_ld_single_module=yes
-else $as_nop
-  tcl_cv_ld_single_module=no
+else case e in #(
+  e) tcl_cv_ld_single_module=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-		LDFLAGS=$hold_ldflags
+		LDFLAGS=$hold_ldflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_ld_single_module" >&5
 printf "%s\n" "$tcl_cv_ld_single_module" >&6; }
@@ -5443,8 +5576,8 @@ printf %s "checking if ld accepts -search_paths_first flag... " >&6; }
 if test ${tcl_cv_ld_search_paths_first+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 		hold_ldflags=$LDFLAGS
 		LDFLAGS="$LDFLAGS -Wl,-search_paths_first"
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -5461,12 +5594,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   tcl_cv_ld_search_paths_first=yes
-else $as_nop
-  tcl_cv_ld_search_paths_first=no
+else case e in #(
+  e) tcl_cv_ld_search_paths_first=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-		LDFLAGS=$hold_ldflags
+		LDFLAGS=$hold_ldflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_ld_search_paths_first" >&5
 printf "%s\n" "$tcl_cv_ld_search_paths_first" >&6; }
@@ -5499,8 +5634,9 @@ printf %s "checking whether to use CoreFoundation... " >&6; }
 if test ${enable_corefoundation+y}
 then :
   enableval=$enable_corefoundation; tcl_corefoundation=$enableval
-else $as_nop
-  tcl_corefoundation=yes
+else case e in #(
+  e) tcl_corefoundation=yes ;;
+esac
 fi
 
 	    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_corefoundation" >&5
@@ -5513,8 +5649,8 @@ printf %s "checking for CoreFoundation.framework... " >&6; }
 if test ${tcl_cv_lib_corefoundation+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 		    hold_libs=$LIBS
 		    if test "$fat_32_64" = yes
 then :
@@ -5542,8 +5678,9 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   tcl_cv_lib_corefoundation=yes
-else $as_nop
-  tcl_cv_lib_corefoundation=no
+else case e in #(
+  e) tcl_cv_lib_corefoundation=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
@@ -5554,7 +5691,8 @@ then :
 			    eval $v'="$hold_'$v'"'
 		        done
 fi
-		    LIBS=$hold_libs
+		    LIBS=$hold_libs ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_lib_corefoundation" >&5
 printf "%s\n" "$tcl_cv_lib_corefoundation" >&6; }
@@ -5566,8 +5704,9 @@ then :
 printf "%s\n" "#define HAVE_COREFOUNDATION 1" >>confdefs.h
 
 
-else $as_nop
-  tcl_corefoundation=no
+else case e in #(
+  e) tcl_corefoundation=no ;;
+esac
 fi
 		if test "$fat_32_64" = yes -a $tcl_corefoundation = yes
 then :
@@ -5577,8 +5716,8 @@ printf %s "checking for 64-bit CoreFoundation... " >&6; }
 if test ${tcl_cv_lib_corefoundation_64+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 			for v in CFLAGS CPPFLAGS LDFLAGS; do
 			    eval 'hold_'$v'="$'$v'";'$v'="`echo "$'$v' "|sed -e "s/-arch ppc / /g" -e "s/-arch i386 / /g"`"'
 			done
@@ -5596,14 +5735,16 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   tcl_cv_lib_corefoundation_64=yes
-else $as_nop
-  tcl_cv_lib_corefoundation_64=no
+else case e in #(
+  e) tcl_cv_lib_corefoundation_64=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
 			for v in CFLAGS CPPFLAGS LDFLAGS; do
 			    eval $v'="$hold_'$v'"'
-			done
+			done ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_lib_corefoundation_64" >&5
 printf "%s\n" "$tcl_cv_lib_corefoundation_64" >&6; }
@@ -5636,10 +5777,11 @@ then :
 
 	        SHLIB_LD='${CC} -shared'
 
-else $as_nop
-
+else case e in #(
+  e)
 	        SHLIB_LD='${CC} -non_shared'
-
+	     ;;
+esac
 fi
 	    SHLIB_SUFFIX=".so"
 	    DL_OBJS="tclLoadDl.o"
@@ -5653,9 +5795,10 @@ fi
 	    if test "$GCC" = yes
 then :
   CFLAGS="$CFLAGS -mieee"
-else $as_nop
-
-		CFLAGS="$CFLAGS -DHAVE_TZSET -std1 -ieee"
+else case e in #(
+  e)
+		CFLAGS="$CFLAGS -DHAVE_TZSET -std1 -ieee" ;;
+esac
 fi
 	    # see pthread_intro(3) for pthread support on osf1, k.furukawa
 	    CFLAGS="$CFLAGS -DHAVE_PTHREAD_ATTR_SETSTACKSIZE"
@@ -5666,11 +5809,12 @@ then :
 
 		LIBS="$LIBS -lpthread -lmach -lexc"
 
-else $as_nop
-
+else case e in #(
+  e)
 		CFLAGS="$CFLAGS -pthread"
 		LDFLAGS="$LDFLAGS -pthread"
-
+	     ;;
+esac
 fi
 	    ;;
 	QNX-6*)
@@ -5695,11 +5839,12 @@ then :
 		SHLIB_CFLAGS="-fPIC -melf"
 		LDFLAGS="$LDFLAGS -melf -Wl,-Bexport"
 
-else $as_nop
-
+else case e in #(
+  e)
 		SHLIB_CFLAGS="-Kpic -belf"
 		LDFLAGS="$LDFLAGS -belf -Wl,-Bexport"
-
+	     ;;
+esac
 fi
 	    SHLIB_LD="ld -G"
 	    SHLIB_LD_LIBS=""
@@ -5733,12 +5878,13 @@ then :
 		CC_SEARCH_FLAGS='-Wl,-R,${LIB_RUNTIME_DIR}'
 		LD_SEARCH_FLAGS=${CC_SEARCH_FLAGS}
 
-else $as_nop
-
+else case e in #(
+  e)
 		SHLIB_LD="/usr/ccs/bin/ld -G -z text"
 		CC_SEARCH_FLAGS='-R ${LIB_RUNTIME_DIR}'
 		LD_SEARCH_FLAGS=${CC_SEARCH_FLAGS}
-
+	     ;;
+esac
 fi
 	    ;;
 	SunOS-5*)
@@ -5771,17 +5917,18 @@ then :
 			    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: 64bit mode not supported with GCC < 3.2 on $system" >&5
 printf "%s\n" "$as_me: WARNING: 64bit mode not supported with GCC < 3.2 on $system" >&2;}
 
-else $as_nop
-
+else case e in #(
+  e)
 			    do64bit_ok=yes
 			    CFLAGS="$CFLAGS -m64 -mcpu=v9"
 			    LDFLAGS="$LDFLAGS -m64 -mcpu=v9"
 			    SHLIB_CFLAGS="-fPIC"
-
+			 ;;
+esac
 fi
 
-else $as_nop
-
+else case e in #(
+  e)
 			do64bit_ok=yes
 			if test "$do64bitVIS" = yes
 then :
@@ -5789,19 +5936,21 @@ then :
 			    CFLAGS="$CFLAGS -xarch=v9a"
 			    LDFLAGS_ARCH="-xarch=v9a"
 
-else $as_nop
-
+else case e in #(
+  e)
 			    CFLAGS="$CFLAGS -xarch=v9"
 			    LDFLAGS_ARCH="-xarch=v9"
-
+			 ;;
+esac
 fi
 			# Solaris 64 uses this as well
 			#LD_LIBRARY_PATH_VAR="LD_LIBRARY_PATH_64"
-
+		     ;;
+esac
 fi
 
-else $as_nop
-  if test "$arch" = "amd64 i386"
+else case e in #(
+  e) if test "$arch" = "amd64 i386"
 then :
 
 		    if test "$GCC" = yes
@@ -5817,8 +5966,8 @@ then :
 printf "%s\n" "$as_me: WARNING: 64bit mode not supported with GCC on $system" >&2;};;
 			esac
 
-else $as_nop
-
+else case e in #(
+  e)
 			do64bit_ok=yes
 			case $system in
 			    SunOS-5.1[1-9]*|SunOS-5.[2-9][0-9]*)
@@ -5828,13 +5977,16 @@ else $as_nop
 				CFLAGS="$CFLAGS -xarch=amd64"
 				LDFLAGS="$LDFLAGS -xarch=amd64";;
 			esac
-
+		     ;;
+esac
 fi
 
-else $as_nop
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: 64bit mode not supported for $arch" >&5
-printf "%s\n" "$as_me: WARNING: 64bit mode not supported for $arch" >&2;}
-fi
+else case e in #(
+  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: 64bit mode not supported for $arch" >&5
+printf "%s\n" "$as_me: WARNING: 64bit mode not supported for $arch" >&2;} ;;
+esac
+fi ;;
+esac
 fi
 
 fi
@@ -5846,8 +5998,8 @@ fi
 	    if test "$GCC" = yes
 then :
   use_sunmath=no
-else $as_nop
-
+else case e in #(
+  e)
 		arch=`isainfo`
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether to use -lsunmath for fp rounding control" >&5
 printf %s "checking whether to use -lsunmath for fp rounding control... " >&6; }
@@ -5865,14 +6017,16 @@ fi
 
 			use_sunmath=yes
 
-else $as_nop
-
+else case e in #(
+  e)
 			{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
 printf "%s\n" "no" >&6; }
 			use_sunmath=no
-
+		 ;;
+esac
 fi
-
+	     ;;
+esac
 fi
 	    SHLIB_SUFFIX=".so"
 	    DL_OBJS="tclLoadDl.o"
@@ -5897,24 +6051,26 @@ then :
 			#v9gcclibdir="`gcc -print-file-name=libgcc_s.so` | ..."
 			#CC_SEARCH_FLAGS="${CC_SEARCH_FLAGS},-R,$v9gcclibdir"
 
-else $as_nop
-  if test "$arch" = "amd64 i386"
+else case e in #(
+  e) if test "$arch" = "amd64 i386"
 then :
 
 			SHLIB_LD="$SHLIB_LD -m64 -static-libgcc"
 
-fi
+fi ;;
+esac
 fi
 
 fi
 
-else $as_nop
-
+else case e in #(
+  e)
 		if test "$use_sunmath" = yes
 then :
   textmode=textoff
-else $as_nop
-  textmode=text
+else case e in #(
+  e) textmode=text ;;
+esac
 fi
 		case $system in
 		    SunOS-5.[1-9][0-9]*|SunOS-5.[7-9])
@@ -5924,7 +6080,8 @@ fi
 		esac
 		CC_SEARCH_FLAGS='-Wl,-R,${LIB_RUNTIME_DIR}'
 		LD_SEARCH_FLAGS='-R ${LIB_RUNTIME_DIR}'
-
+	     ;;
+esac
 fi
 	    ;;
 	UNIX_SV* | UnixWare-5*)
@@ -5941,8 +6098,8 @@ printf %s "checking for ld accepts -Bexport flag... " >&6; }
 if test ${tcl_cv_ld_Bexport+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 		hold_ldflags=$LDFLAGS
 		LDFLAGS="$LDFLAGS -Wl,-Bexport"
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -5959,12 +6116,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   tcl_cv_ld_Bexport=yes
-else $as_nop
-  tcl_cv_ld_Bexport=no
+else case e in #(
+  e) tcl_cv_ld_Bexport=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-	        LDFLAGS=$hold_ldflags
+	        LDFLAGS=$hold_ldflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_ld_Bexport" >&5
 printf "%s\n" "$tcl_cv_ld_Bexport" >&6; }
@@ -6004,8 +6163,9 @@ fi
 if test ${enable_load+y}
 then :
   enableval=$enable_load; tcl_ok=$enableval
-else $as_nop
-  tcl_ok=yes
+else case e in #(
+  e) tcl_ok=yes ;;
+esac
 fi
 
     if test "$tcl_ok" = no
@@ -6016,8 +6176,8 @@ fi
     if test "x$DL_OBJS" != x
 then :
   BUILD_DLTEST="\$(DLTEST_TARGETS)"
-else $as_nop
-
+else case e in #(
+  e)
 	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: Can't figure out how to do dynamic loading or shared libraries on this system." >&5
 printf "%s\n" "$as_me: WARNING: Can't figure out how to do dynamic loading or shared libraries on this system." >&2;}
 	SHLIB_CFLAGS=""
@@ -6029,7 +6189,8 @@ printf "%s\n" "$as_me: WARNING: Can't figure out how to do dynamic loading or sh
 	CC_SEARCH_FLAGS=""
 	LD_SEARCH_FLAGS=""
 	BUILD_DLTEST=""
-
+     ;;
+esac
 fi
     LDFLAGS="$LDFLAGS $LDFLAGS_ARCH"
 
@@ -6087,14 +6248,15 @@ then :
             INSTALL_LIB='$(INSTALL_LIBRARY) $(LIB_FILE) "$(BIN_INSTALL_DIR)/$(LIB_FILE)"'
             DLL_INSTALL_DIR="\$(BIN_INSTALL_DIR)"
 
-else $as_nop
-
+else case e in #(
+  e)
             INSTALL_LIB='$(INSTALL_LIBRARY) $(LIB_FILE) "$(LIB_INSTALL_DIR)/$(LIB_FILE)"'
-
+         ;;
+esac
 fi
 
-else $as_nop
-
+else case e in #(
+  e)
         LIB_SUFFIX=${UNSHARED_LIB_SUFFIX}
 
         if test "$RANLIB" = ""
@@ -6102,13 +6264,15 @@ then :
 
             MAKE_LIB='$(STLIB_LD) $@ ${OBJS}'
 
-else $as_nop
-
+else case e in #(
+  e)
             MAKE_LIB='${STLIB_LD} $@ ${OBJS} ; ${RANLIB} $@'
-
+         ;;
+esac
 fi
         INSTALL_LIB='$(INSTALL_LIBRARY) $(LIB_FILE) "$(LIB_INSTALL_DIR)/$(LIB_FILE)"'
-
+     ;;
+esac
 fi
 
     # Stub lib does not depend on shared/static configuration
@@ -6117,10 +6281,11 @@ then :
 
         MAKE_STUB_LIB='${STLIB_LD} $@ ${STUB_LIB_OBJS}'
 
-else $as_nop
-
+else case e in #(
+  e)
         MAKE_STUB_LIB='${STLIB_LD} $@ ${STUB_LIB_OBJS} ; ${RANLIB} $@'
-
+     ;;
+esac
 fi
     INSTALL_STUB_LIB='$(INSTALL_LIBRARY) $(STUB_LIB_FILE) "$(LIB_INSTALL_DIR)/$(STUB_LIB_FILE)"'
 
@@ -6143,8 +6308,8 @@ printf %s "checking for cast to union support... " >&6; }
 if test ${tcl_cv_cast_to_union+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -6161,11 +6326,13 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_cast_to_union=yes
-else $as_nop
-  tcl_cv_cast_to_union=no
+else case e in #(
+  e) tcl_cv_cast_to_union=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-
+     ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cast_to_union" >&5
 printf "%s\n" "$tcl_cv_cast_to_union" >&6; }
@@ -6180,8 +6347,8 @@ printf %s "checking for working -fno-lto... " >&6; }
 if test ${ac_cv_nolto+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -6195,11 +6362,13 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_nolto=yes
-else $as_nop
-  ac_cv_nolto=no
+else case e in #(
+  e) ac_cv_nolto=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-
+     ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_nolto" >&5
 printf "%s\n" "$ac_cv_nolto" >&6; }
@@ -6214,8 +6383,8 @@ printf %s "checking if the compiler understands -finput-charset... " >&6; }
 if test ${tcl_cv_cc_input_charset+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -finput-charset=UTF-8"
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -6231,11 +6400,13 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_cc_input_charset=yes
-else $as_nop
-  tcl_cv_cc_input_charset=no
+else case e in #(
+  e) tcl_cv_cc_input_charset=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-	CFLAGS=$hold_cflags
+	CFLAGS=$hold_cflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cc_input_charset" >&5
 printf "%s\n" "$tcl_cv_cc_input_charset" >&6; }
@@ -6299,8 +6470,9 @@ printf %s "checking for build with symbols... " >&6; }
 if test ${enable_symbols+y}
 then :
   enableval=$enable_symbols; tcl_ok=$enableval
-else $as_nop
-  tcl_ok=no
+else case e in #(
+  e) tcl_ok=no ;;
+esac
 fi
 
 # FIXME: Currently, LDFLAGS_DEFAULT is not used, it should work like CFLAGS_DEFAULT.
@@ -6357,8 +6529,8 @@ printf %s "checking for required early compiler flags... " >&6; }
     if test ${tcl_cv_flag__isoc99_source+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <stdlib.h>
 int
@@ -6372,8 +6544,8 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_flag__isoc99_source=no
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #define _ISOC99_SOURCE 1
 #include <stdlib.h>
@@ -6388,12 +6560,15 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_flag__isoc99_source=yes
-else $as_nop
-  tcl_cv_flag__isoc99_source=no
+else case e in #(
+  e) tcl_cv_flag__isoc99_source=no ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 
     if test "x${tcl_cv_flag__isoc99_source}" = "xyes" ; then
@@ -6407,8 +6582,8 @@ printf "%s\n" "#define _ISOC99_SOURCE 1" >>confdefs.h
     if test ${tcl_cv_flag__file_offset_bits+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/stat.h>
 int
@@ -6422,8 +6597,8 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_flag__file_offset_bits=no
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #define _FILE_OFFSET_BITS 64
 #include <sys/stat.h>
@@ -6438,12 +6613,15 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_flag__file_offset_bits=yes
-else $as_nop
-  tcl_cv_flag__file_offset_bits=no
+else case e in #(
+  e) tcl_cv_flag__file_offset_bits=no ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 
     if test "x${tcl_cv_flag__file_offset_bits}" = "xyes" ; then
@@ -6468,8 +6646,8 @@ printf %s "checking if 'long' and 'long long' have the same size (64-bit)?... "
     if test ${tcl_cv_type_64bit+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	tcl_cv_type_64bit=none
 	# See if we could use long anyway  Note that we substitute in the
 	# type that is our current guess for a 64-bit type inside this check
@@ -6491,7 +6669,8 @@ if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_type_64bit="long long"
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 
     if test "${tcl_cv_type_64bit}" = none ; then
@@ -6509,8 +6688,8 @@ printf %s "checking for 64-bit time_t... " >&6; }
 if test ${tcl_cv_time_t_64+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
@@ -6525,10 +6704,12 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_time_t_64=yes
-else $as_nop
-  tcl_cv_time_t_64=no
+else case e in #(
+  e) tcl_cv_time_t_64=no ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_time_t_64" >&5
 printf "%s\n" "$tcl_cv_time_t_64" >&6; }
@@ -6540,8 +6721,8 @@ printf %s "checking if _TIME_BITS=64 enables 64-bit time_t... " >&6; }
 if test ${tcl_cv__time_bits+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 		cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #define _TIME_BITS 64
@@ -6557,10 +6738,12 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv__time_bits=yes
-else $as_nop
-  tcl_cv__time_bits=no
+else case e in #(
+  e) tcl_cv__time_bits=no ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv__time_bits" >&5
 printf "%s\n" "$tcl_cv__time_bits" >&6; }
@@ -6576,8 +6759,8 @@ printf %s "checking for struct dirent64... " >&6; }
 if test ${tcl_cv_struct_dirent64+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
@@ -6593,10 +6776,12 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_struct_dirent64=yes
-else $as_nop
-  tcl_cv_struct_dirent64=no
+else case e in #(
+  e) tcl_cv_struct_dirent64=no ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_struct_dirent64" >&5
 printf "%s\n" "$tcl_cv_struct_dirent64" >&6; }
@@ -6611,8 +6796,8 @@ printf %s "checking for DIR64... " >&6; }
 if test ${tcl_cv_DIR64+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
@@ -6629,10 +6814,12 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_DIR64=yes
-else $as_nop
-  tcl_cv_DIR64=no
+else case e in #(
+  e) tcl_cv_DIR64=no ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_DIR64" >&5
 printf "%s\n" "$tcl_cv_DIR64" >&6; }
@@ -6647,8 +6834,8 @@ printf %s "checking for struct stat64... " >&6; }
 if test ${tcl_cv_struct_stat64+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/stat.h>
@@ -6664,10 +6851,12 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_struct_stat64=yes
-else $as_nop
-  tcl_cv_struct_stat64=no
+else case e in #(
+  e) tcl_cv_struct_stat64=no ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_struct_stat64" >&5
 printf "%s\n" "$tcl_cv_struct_stat64" >&6; }
@@ -6695,8 +6884,8 @@ printf %s "checking for off64_t... " >&6; }
 	if test ${tcl_cv_type_off64_t+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
@@ -6712,10 +6901,12 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_type_off64_t=yes
-else $as_nop
-  tcl_cv_type_off64_t=no
+else case e in #(
+  e) tcl_cv_type_off64_t=no ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 
 			if test "x${tcl_cv_type_off64_t}" = "xyes" && \
@@ -6742,8 +6933,8 @@ printf %s "checking whether byte ordering is bigendian... " >&6; }
 if test ${ac_cv_c_bigendian+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_cv_c_bigendian=unknown
+else case e in #(
+  e) ac_cv_c_bigendian=unknown
     # See if we're dealing with a universal compiler.
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -6789,8 +6980,8 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 int
 main (void)
 {
-#if ! (defined BYTE_ORDER && defined BIG_ENDIAN \
-		     && defined LITTLE_ENDIAN && BYTE_ORDER && BIG_ENDIAN \
+#if ! (defined BYTE_ORDER && defined BIG_ENDIAN \\
+		     && defined LITTLE_ENDIAN && BYTE_ORDER && BIG_ENDIAN \\
 		     && LITTLE_ENDIAN)
 	      bogus endian macros
 	     #endif
@@ -6821,8 +7012,9 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_c_bigendian=yes
-else $as_nop
-  ac_cv_c_bigendian=no
+else case e in #(
+  e) ac_cv_c_bigendian=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
@@ -6866,8 +7058,9 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_c_bigendian=yes
-else $as_nop
-  ac_cv_c_bigendian=no
+else case e in #(
+  e) ac_cv_c_bigendian=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
@@ -6894,22 +7087,23 @@ unsigned short int ascii_mm[] =
 		int use_ebcdic (int i) {
 		  return ebcdic_mm[i] + ebcdic_ii[i];
 		}
-		extern int foo;
-
-int
-main (void)
-{
-return use_ascii (foo) == use_ebcdic (foo);
-  ;
-  return 0;
-}
+		int
+		main (int argc, char **argv)
+		{
+		  /* Intimidate the compiler so that it does not
+		     optimize the arrays away.  */
+		  char *p = argv[0];
+		  ascii_mm[1] = *p++; ebcdic_mm[1] = *p++;
+		  ascii_ii[1] = *p++; ebcdic_ii[1] = *p++;
+		  return use_ascii (argc) == use_ebcdic (*p);
+		}
 _ACEOF
-if ac_fn_c_try_compile "$LINENO"
+if ac_fn_c_try_link "$LINENO"
 then :
-  if grep BIGenDianSyS conftest.$ac_objext >/dev/null; then
+  if grep BIGenDianSyS conftest$ac_exeext >/dev/null; then
 	      ac_cv_c_bigendian=yes
 	    fi
-	    if grep LiTTleEnDian conftest.$ac_objext >/dev/null ; then
+	    if grep LiTTleEnDian conftest$ac_exeext >/dev/null ; then
 	      if test "$ac_cv_c_bigendian" = unknown; then
 		ac_cv_c_bigendian=no
 	      else
@@ -6918,9 +7112,10 @@ then :
 	      fi
 	    fi
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam \
+    conftest$ac_exeext conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_includes_default
 int
@@ -6943,14 +7138,17 @@ _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   ac_cv_c_bigendian=no
-else $as_nop
-  ac_cv_c_bigendian=yes
+else case e in #(
+  e) ac_cv_c_bigendian=yes ;;
+esac
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
+  conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 
-    fi
+    fi ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_bigendian" >&5
 printf "%s\n" "$ac_cv_c_bigendian" >&6; }
@@ -7004,8 +7202,8 @@ printf %s "checking for fd_set in sys/types... " >&6; }
 if test ${tcl_cv_type_fd_set+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/types.h>
@@ -7020,10 +7218,12 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_type_fd_set=yes
-else $as_nop
-  tcl_cv_type_fd_set=no
+else case e in #(
+  e) tcl_cv_type_fd_set=no ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_type_fd_set" >&5
 printf "%s\n" "$tcl_cv_type_fd_set" >&6; }
@@ -7044,8 +7244,8 @@ if test -z "$CPP"; then
   if test ${ac_cv_prog_CPP+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-      # Double quotes because $CC needs to be expanded
+else case e in #(
+  e)     # Double quotes because $CC needs to be expanded
     for CPP in "$CC -E" "$CC -E -traditional-cpp" cpp /lib/cpp
     do
       ac_preproc_ok=false
@@ -7063,9 +7263,10 @@ _ACEOF
 if ac_fn_c_try_cpp "$LINENO"
 then :
 
-else $as_nop
-  # Broken: fails on valid input.
-continue
+else case e in #(
+  e) # Broken: fails on valid input.
+continue ;;
+esac
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 
@@ -7079,15 +7280,16 @@ if ac_fn_c_try_cpp "$LINENO"
 then :
   # Broken: success on invalid input.
 continue
-else $as_nop
-  # Passes both tests.
+else case e in #(
+  e) # Passes both tests.
 ac_preproc_ok=:
-break
+break ;;
+esac
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 
 done
-# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+# Because of 'break', _AC_PREPROC_IFELSE's cleaning code was skipped.
 rm -f conftest.i conftest.err conftest.$ac_ext
 if $ac_preproc_ok
 then :
@@ -7096,7 +7298,8 @@ fi
 
     done
     ac_cv_prog_CPP=$CPP
-
+   ;;
+esac
 fi
   CPP=$ac_cv_prog_CPP
 else
@@ -7119,9 +7322,10 @@ _ACEOF
 if ac_fn_c_try_cpp "$LINENO"
 then :
 
-else $as_nop
-  # Broken: fails on valid input.
-continue
+else case e in #(
+  e) # Broken: fails on valid input.
+continue ;;
+esac
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 
@@ -7135,24 +7339,26 @@ if ac_fn_c_try_cpp "$LINENO"
 then :
   # Broken: success on invalid input.
 continue
-else $as_nop
-  # Passes both tests.
+else case e in #(
+  e) # Passes both tests.
 ac_preproc_ok=:
-break
+break ;;
+esac
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 
 done
-# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+# Because of 'break', _AC_PREPROC_IFELSE's cleaning code was skipped.
 rm -f conftest.i conftest.err conftest.$ac_ext
 if $ac_preproc_ok
 then :
 
-else $as_nop
-  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+else case e in #(
+  e) { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
-See \`config.log' for more details" "$LINENO" 5; }
+See 'config.log' for more details" "$LINENO" 5; } ;;
+esac
 fi
 
 ac_ext=c
@@ -7162,14 +7368,14 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
-printf %s "checking for grep that handles long lines and -e... " >&6; }
-if test ${ac_cv_path_GREP+y}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for egrep -e" >&5
+printf %s "checking for egrep -e... " >&6; }
+if test ${ac_cv_path_EGREP_TRADITIONAL+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -z "$GREP"; then
-  ac_path_GREP_found=false
+else case e in #(
+  e) if test -z "$EGREP_TRADITIONAL"; then
+  ac_path_EGREP_TRADITIONAL_found=false
   # Loop through the user's path and test for each of PROGNAME-LIST
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
@@ -7183,13 +7389,14 @@ do
     for ac_prog in grep ggrep
    do
     for ac_exec_ext in '' $ac_executable_extensions; do
-      ac_path_GREP="$as_dir$ac_prog$ac_exec_ext"
-      as_fn_executable_p "$ac_path_GREP" || continue
-# Check for GNU ac_path_GREP and select it if it is found.
-  # Check for GNU $ac_path_GREP
-case `"$ac_path_GREP" --version 2>&1` in
+      ac_path_EGREP_TRADITIONAL="$as_dir$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_EGREP_TRADITIONAL" || continue
+# Check for GNU ac_path_EGREP_TRADITIONAL and select it if it is found.
+  # Check for GNU $ac_path_EGREP_TRADITIONAL
+case `"$ac_path_EGREP_TRADITIONAL" --version 2>&1` in #(
 *GNU*)
-  ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
+  ac_cv_path_EGREP_TRADITIONAL="$ac_path_EGREP_TRADITIONAL" ac_path_EGREP_TRADITIONAL_found=:;;
+#(
 *)
   ac_count=0
   printf %s 0123456789 >"conftest.in"
@@ -7198,14 +7405,14 @@ case `"$ac_path_GREP" --version 2>&1` in
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
-    printf "%s\n" 'GREP' >> "conftest.nl"
-    "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    printf "%s\n" 'EGREP_TRADITIONAL' >> "conftest.nl"
+    "$ac_path_EGREP_TRADITIONAL" -E 'EGR(EP|AC)_TRADITIONAL$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
-    if test $ac_count -gt ${ac_path_GREP_max-0}; then
+    if test $ac_count -gt ${ac_path_EGREP_TRADITIONAL_max-0}; then
       # Best one so far, save it but keep looking for a better one
-      ac_cv_path_GREP="$ac_path_GREP"
-      ac_path_GREP_max=$ac_count
+      ac_cv_path_EGREP_TRADITIONAL="$ac_path_EGREP_TRADITIONAL"
+      ac_path_EGREP_TRADITIONAL_max=$ac_count
     fi
     # 10*(2^10) chars as input seems more than enough
     test $ac_count -gt 10 && break
@@ -7213,35 +7420,24 @@ case `"$ac_path_GREP" --version 2>&1` in
   rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
 esac
 
-      $ac_path_GREP_found && break 3
+      $ac_path_EGREP_TRADITIONAL_found && break 3
     done
   done
   done
 IFS=$as_save_IFS
-  if test -z "$ac_cv_path_GREP"; then
-    as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  if test -z "$ac_cv_path_EGREP_TRADITIONAL"; then
+    :
   fi
 else
-  ac_cv_path_GREP=$GREP
-fi
-
+  ac_cv_path_EGREP_TRADITIONAL=$EGREP_TRADITIONAL
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
-printf "%s\n" "$ac_cv_path_GREP" >&6; }
- GREP="$ac_cv_path_GREP"
-
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
-printf %s "checking for egrep... " >&6; }
-if test ${ac_cv_path_EGREP+y}
+    if test "$ac_cv_path_EGREP_TRADITIONAL"
 then :
-  printf %s "(cached) " >&6
-else $as_nop
-  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
-   then ac_cv_path_EGREP="$GREP -E"
-   else
-     if test -z "$EGREP"; then
-  ac_path_EGREP_found=false
+  ac_cv_path_EGREP_TRADITIONAL="$ac_cv_path_EGREP_TRADITIONAL -E"
+else case e in #(
+  e) if test -z "$EGREP_TRADITIONAL"; then
+  ac_path_EGREP_TRADITIONAL_found=false
   # Loop through the user's path and test for each of PROGNAME-LIST
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
@@ -7255,13 +7451,14 @@ do
     for ac_prog in egrep
    do
     for ac_exec_ext in '' $ac_executable_extensions; do
-      ac_path_EGREP="$as_dir$ac_prog$ac_exec_ext"
-      as_fn_executable_p "$ac_path_EGREP" || continue
-# Check for GNU ac_path_EGREP and select it if it is found.
-  # Check for GNU $ac_path_EGREP
-case `"$ac_path_EGREP" --version 2>&1` in
+      ac_path_EGREP_TRADITIONAL="$as_dir$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_EGREP_TRADITIONAL" || continue
+# Check for GNU ac_path_EGREP_TRADITIONAL and select it if it is found.
+  # Check for GNU $ac_path_EGREP_TRADITIONAL
+case `"$ac_path_EGREP_TRADITIONAL" --version 2>&1` in #(
 *GNU*)
-  ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
+  ac_cv_path_EGREP_TRADITIONAL="$ac_path_EGREP_TRADITIONAL" ac_path_EGREP_TRADITIONAL_found=:;;
+#(
 *)
   ac_count=0
   printf %s 0123456789 >"conftest.in"
@@ -7270,14 +7467,14 @@ case `"$ac_path_EGREP" --version 2>&1` in
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
-    printf "%s\n" 'EGREP' >> "conftest.nl"
-    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    printf "%s\n" 'EGREP_TRADITIONAL' >> "conftest.nl"
+    "$ac_path_EGREP_TRADITIONAL" 'EGR(EP|AC)_TRADITIONAL$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
-    if test $ac_count -gt ${ac_path_EGREP_max-0}; then
+    if test $ac_count -gt ${ac_path_EGREP_TRADITIONAL_max-0}; then
       # Best one so far, save it but keep looking for a better one
-      ac_cv_path_EGREP="$ac_path_EGREP"
-      ac_path_EGREP_max=$ac_count
+      ac_cv_path_EGREP_TRADITIONAL="$ac_path_EGREP_TRADITIONAL"
+      ac_path_EGREP_TRADITIONAL_max=$ac_count
     fi
     # 10*(2^10) chars as input seems more than enough
     test $ac_count -gt 10 && break
@@ -7285,46 +7482,49 @@ case `"$ac_path_EGREP" --version 2>&1` in
   rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
 esac
 
-      $ac_path_EGREP_found && break 3
+      $ac_path_EGREP_TRADITIONAL_found && break 3
     done
   done
   done
 IFS=$as_save_IFS
-  if test -z "$ac_cv_path_EGREP"; then
+  if test -z "$ac_cv_path_EGREP_TRADITIONAL"; then
     as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
   fi
 else
-  ac_cv_path_EGREP=$EGREP
+  ac_cv_path_EGREP_TRADITIONAL=$EGREP_TRADITIONAL
 fi
-
-   fi
+ ;;
+esac
+fi ;;
+esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
-printf "%s\n" "$ac_cv_path_EGREP" >&6; }
- EGREP="$ac_cv_path_EGREP"
-
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP_TRADITIONAL" >&5
+printf "%s\n" "$ac_cv_path_EGREP_TRADITIONAL" >&6; }
+ EGREP_TRADITIONAL=$ac_cv_path_EGREP_TRADITIONAL
 
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for fd_mask in sys/select" >&5
 printf %s "checking for fd_mask in sys/select... " >&6; }
 if test ${tcl_cv_grep_fd_mask+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <sys/select.h>
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "fd_mask" >/dev/null 2>&1
+  $EGREP_TRADITIONAL "fd_mask" >/dev/null 2>&1
 then :
   tcl_cv_grep_fd_mask=present
-else $as_nop
-  tcl_cv_grep_fd_mask=missing
+else case e in #(
+  e) tcl_cv_grep_fd_mask=missing ;;
+esac
 fi
 rm -rf conftest*
-
+ ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_grep_fd_mask" >&5
 printf "%s\n" "$tcl_cv_grep_fd_mask" >&6; }
@@ -7357,10 +7557,11 @@ ac_fn_c_check_type "$LINENO" "mode_t" "ac_cv_type_mode_t" "$ac_includes_default"
 if test "x$ac_cv_type_mode_t" = xyes
 then :
 
-else $as_nop
-
+else case e in #(
+  e)
 printf "%s\n" "#define mode_t int" >>confdefs.h
-
+ ;;
+esac
 fi
 
 
@@ -7369,8 +7570,8 @@ fi
 if test "x$ac_cv_type_pid_t" = xyes
 then :
 
-else $as_nop
-                                          cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e)                                         cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
           #if defined _WIN64 && !defined __CYGWIN__
@@ -7389,14 +7590,16 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_pid_type='int'
-else $as_nop
-  ac_pid_type='__int64'
+else case e in #(
+  e) ac_pid_type='__int64' ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 
 printf "%s\n" "#define pid_t $ac_pid_type" >>confdefs.h
 
-
+     ;;
+esac
 fi
 
 
@@ -7404,10 +7607,11 @@ ac_fn_c_check_type "$LINENO" "size_t" "ac_cv_type_size_t" "$ac_includes_default"
 if test "x$ac_cv_type_size_t" = xyes
 then :
 
-else $as_nop
-
+else case e in #(
+  e)
 printf "%s\n" "#define size_t unsigned int" >>confdefs.h
-
+ ;;
+esac
 fi
 
 
@@ -7444,8 +7648,8 @@ printf %s "checking pw_gecos in struct pwd... " >&6; }
 if test ${tcl_cv_pwd_pw_gecos+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <pwd.h>
@@ -7460,10 +7664,12 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_pwd_pw_gecos=yes
-else $as_nop
-  tcl_cv_pwd_pw_gecos=no
+else case e in #(
+  e) tcl_cv_pwd_pw_gecos=no ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_pwd_pw_gecos" >&5
 printf "%s\n" "$tcl_cv_pwd_pw_gecos" >&6; }
@@ -7484,8 +7690,9 @@ printf %s "checking whether to use Aqua... " >&6; }
 if test ${enable_aqua+y}
 then :
   enableval=$enable_aqua; tk_aqua=$enableval
-else $as_nop
-  tk_aqua=no
+else case e in #(
+  e) tk_aqua=no ;;
+esac
 fi
 
     if test $tk_aqua = yes -o $tk_aqua = cocoa; then
@@ -7515,8 +7722,8 @@ printf %s "checking if ld accepts -weak-l flag... " >&6; }
 if test ${tcl_cv_ld_weak_l+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	    hold_ldflags=$LDFLAGS
 	    LDFLAGS="$LDFLAGS -Wl,-weak-lm"
 	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -7533,12 +7740,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   tcl_cv_ld_weak_l=yes
-else $as_nop
-  tcl_cv_ld_weak_l=no
+else case e in #(
+  e) tcl_cv_ld_weak_l=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-	    LDFLAGS=$hold_ldflags
+	    LDFLAGS=$hold_ldflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_ld_weak_l" >&5
 printf "%s\n" "$tcl_cv_ld_weak_l" >&6; }
@@ -7556,8 +7765,8 @@ printf %s "checking if weak import is available... " >&6; }
 if test ${tcl_cv_cc_weak_import+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	    hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -Werror"
 	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -7582,12 +7791,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   tcl_cv_cc_weak_import=yes
-else $as_nop
-  tcl_cv_cc_weak_import=no
+else case e in #(
+  e) tcl_cv_cc_weak_import=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-	    CFLAGS=$hold_cflags
+	    CFLAGS=$hold_cflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cc_weak_import" >&5
 printf "%s\n" "$tcl_cv_cc_weak_import" >&6; }
@@ -7601,8 +7812,8 @@ printf %s "checking if Darwin SUSv3 extensions are available... " >&6; }
 if test ${tcl_cv_cc_darwin_c_source+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	    hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -Werror"
 	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -7628,11 +7839,13 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_cc_darwin_c_source=yes
-else $as_nop
-  tcl_cv_cc_darwin_c_source=no
+else case e in #(
+  e) tcl_cv_cc_darwin_c_source=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-	    CFLAGS=$hold_cflags
+	    CFLAGS=$hold_cflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cc_darwin_c_source" >&5
 printf "%s\n" "$tcl_cv_cc_darwin_c_source" >&6; }
@@ -7685,7 +7898,7 @@ then :
   withval=$with_x;
 fi
 
-# $have_x is `yes', `no', `disabled', or empty when we do not yet know.
+# $have_x is 'yes', 'no', 'disabled', or empty when we do not yet know.
 if test "x$with_x" = xno; then
   # The user explicitly disabled X.
   have_x=disabled
@@ -7695,8 +7908,8 @@ else
     *,NONE | NONE,*) if test ${ac_cv_have_x+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  # One or both of the vars are not set, and there is no cached value.
+else case e in #(
+  e) # One or both of the vars are not set, and there is no cached value.
 ac_x_includes=no
 ac_x_libraries=no
 # Do we need to do anything special at all?
@@ -7819,13 +8032,14 @@ if ac_fn_c_try_cpp "$LINENO"
 then :
   # We can compile using X headers with no special include directory.
 ac_x_includes=
-else $as_nop
-  for ac_dir in $ac_x_header_dirs; do
+else case e in #(
+  e) for ac_dir in $ac_x_header_dirs; do
   if test -r "$ac_dir/X11/Xlib.h"; then
     ac_x_includes=$ac_dir
     break
   fi
-done
+done ;;
+esac
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 fi # $ac_x_includes = no
@@ -7852,8 +8066,8 @@ then :
   LIBS=$ac_save_LIBS
 # We can link X programs with no special library path.
 ac_x_libraries=
-else $as_nop
-  LIBS=$ac_save_LIBS
+else case e in #(
+  e) LIBS=$ac_save_LIBS
 for ac_dir in `printf "%s\n" "$ac_x_includes $ac_x_header_dirs" | sed s/include/lib/g`
 do
   # Don't even attempt the hair of trying to link an X program!
@@ -7863,7 +8077,8 @@ do
       break 2
     fi
   done
-done
+done ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
@@ -7880,6 +8095,7 @@ case $ac_x_includes,$ac_x_libraries in #(
     ac_cv_have_x="have_x=yes\
 	ac_x_includes='$ac_x_includes'\
 	ac_x_libraries='$ac_x_libraries'" ;;
+esac ;;
 esac
 fi
 ;; #(
@@ -7914,8 +8130,9 @@ _ACEOF
 if ac_fn_c_try_cpp "$LINENO"
 then :
 
-else $as_nop
-  not_really_there="yes"
+else case e in #(
+  e) not_really_there="yes" ;;
+esac
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 	else
@@ -7935,8 +8152,9 @@ _ACEOF
 if ac_fn_c_try_cpp "$LINENO"
 then :
   found_xincludes="yes"
-else $as_nop
-  found_xincludes="no"
+else case e in #(
+  e) found_xincludes="no" ;;
+esac
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 	if test "$found_xincludes" = "no"; then
@@ -7989,16 +8207,22 @@ printf %s "checking for XCreateWindow in -lXwindow... " >&6; }
 if test ${ac_cv_lib_Xwindow_XCreateWindow+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
+else case e in #(
+  e) ac_check_lib_save_LIBS=$LIBS
 LIBS="-lXwindow  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char XCreateWindow ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char XCreateWindow (void);
 int
 main (void)
 {
@@ -8010,12 +8234,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_Xwindow_XCreateWindow=yes
-else $as_nop
-  ac_cv_lib_Xwindow_XCreateWindow=no
+else case e in #(
+  e) ac_cv_lib_Xwindow_XCreateWindow=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
+LIBS=$ac_check_lib_save_LIBS ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_Xwindow_XCreateWindow" >&5
 printf "%s\n" "$ac_cv_lib_Xwindow_XCreateWindow" >&6; }
@@ -8081,8 +8307,8 @@ printf %s "checking for main in -lXbsd... " >&6; }
 if test ${ac_cv_lib_Xbsd_main+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
+else case e in #(
+  e) ac_check_lib_save_LIBS=$LIBS
 LIBS="-lXbsd  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -8099,12 +8325,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_Xbsd_main=yes
-else $as_nop
-  ac_cv_lib_Xbsd_main=no
+else case e in #(
+  e) ac_cv_lib_Xbsd_main=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
+LIBS=$ac_check_lib_save_LIBS ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_Xbsd_main" >&5
 printf "%s\n" "$ac_cv_lib_Xbsd_main" >&6; }
@@ -8156,9 +8384,10 @@ printf "%s\n" "yes" >&6; }
 	XLIBSW="-lX11-mit"
 	XINCLUDES="-I/usr/include/mit"
 
-else $as_nop
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
-printf "%s\n" "no" >&6; }
+else case e in #(
+  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: no" >&5
+printf "%s\n" "no" >&6; } ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
@@ -8177,8 +8406,9 @@ printf %s "checking whether to use xft... " >&6; }
 if test ${enable_xft+y}
 then :
   enableval=$enable_xft; enable_xft=$enableval
-else $as_nop
-  enable_xft="default"
+else case e in #(
+  e) enable_xft="default" ;;
+esac
 fi
 
     XFT_CFLAGS=""
@@ -8207,10 +8437,11 @@ printf "%s\n" "$found_xft" >&6; }
 if test "x$ac_cv_header_X11_Xft_Xft_h" = xyes
 then :
 
-else $as_nop
-
+else case e in #(
+  e)
 		found_xft=no
-
+	     ;;
+esac
 fi
 
 	    CFLAGS=$tk_oldCFlags
@@ -8226,16 +8457,22 @@ printf %s "checking for XftFontOpen in -lXft... " >&6; }
 if test ${ac_cv_lib_Xft_XftFontOpen+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
+else case e in #(
+  e) ac_check_lib_save_LIBS=$LIBS
 LIBS="-lXft  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char XftFontOpen ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char XftFontOpen (void);
 int
 main (void)
 {
@@ -8247,12 +8484,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_Xft_XftFontOpen=yes
-else $as_nop
-  ac_cv_lib_Xft_XftFontOpen=no
+else case e in #(
+  e) ac_cv_lib_Xft_XftFontOpen=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
+LIBS=$ac_check_lib_save_LIBS ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_Xft_XftFontOpen" >&5
 printf "%s\n" "$ac_cv_lib_Xft_XftFontOpen" >&6; }
@@ -8262,10 +8501,11 @@ then :
 
   LIBS="-lXft $LIBS"
 
-else $as_nop
-
+else case e in #(
+  e)
 		found_xft=no
-
+	     ;;
+esac
 fi
 
 	    CFLAGS=$tk_oldCFlags
@@ -8281,16 +8521,22 @@ printf %s "checking for FcFontSort in -lfontconfig... " >&6; }
 if test ${ac_cv_lib_fontconfig_FcFontSort+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
+else case e in #(
+  e) ac_check_lib_save_LIBS=$LIBS
 LIBS="-lfontconfig  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char FcFontSort ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char FcFontSort (void);
 int
 main (void)
 {
@@ -8302,12 +8548,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_fontconfig_FcFontSort=yes
-else $as_nop
-  ac_cv_lib_fontconfig_FcFontSort=no
+else case e in #(
+  e) ac_cv_lib_fontconfig_FcFontSort=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
+LIBS=$ac_check_lib_save_LIBS ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_fontconfig_FcFontSort" >&5
 printf "%s\n" "$ac_cv_lib_fontconfig_FcFontSort" >&6; }
@@ -8368,8 +8616,9 @@ printf %s "checking whether to try to use XScreenSaver... " >&6; }
 if test ${enable_xss+y}
 then :
   enableval=$enable_xss; enable_xss=$enableval
-else $as_nop
-  enable_xss=yes
+else case e in #(
+  e) enable_xss=yes ;;
+esac
 fi
 
     if test "$enable_xss" = "no" ; then
@@ -8391,23 +8640,29 @@ fi
 if test "x$ac_cv_func_XScreenSaverQueryInfo" = xyes
 then :
 
-else $as_nop
-
+else case e in #(
+  e)
 	    { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for XScreenSaverQueryInfo in -lXext" >&5
 printf %s "checking for XScreenSaverQueryInfo in -lXext... " >&6; }
 if test ${ac_cv_lib_Xext_XScreenSaverQueryInfo+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
+else case e in #(
+  e) ac_check_lib_save_LIBS=$LIBS
 LIBS="-lXext  $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char XScreenSaverQueryInfo ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char XScreenSaverQueryInfo (void);
 int
 main (void)
 {
@@ -8419,12 +8674,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_Xext_XScreenSaverQueryInfo=yes
-else $as_nop
-  ac_cv_lib_Xext_XScreenSaverQueryInfo=no
+else case e in #(
+  e) ac_cv_lib_Xext_XScreenSaverQueryInfo=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
+LIBS=$ac_check_lib_save_LIBS ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_Xext_XScreenSaverQueryInfo" >&5
 printf "%s\n" "$ac_cv_lib_Xext_XScreenSaverQueryInfo" >&6; }
@@ -8434,23 +8691,29 @@ then :
 		XLIBSW="$XLIBSW -lXext"
 		xss_lib_found=yes
 
-else $as_nop
-
+else case e in #(
+  e)
 		{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for XScreenSaverQueryInfo in -lXss" >&5
 printf %s "checking for XScreenSaverQueryInfo in -lXss... " >&6; }
 if test ${ac_cv_lib_Xss_XScreenSaverQueryInfo+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_check_lib_save_LIBS=$LIBS
+else case e in #(
+  e) ac_check_lib_save_LIBS=$LIBS
 LIBS="-lXss -lXext $LIBS"
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 /* Override any GCC internal prototype to avoid an error.
    Use char because int might match the return type of a GCC
-   builtin and then its argument prototype would still apply.  */
-char XScreenSaverQueryInfo ();
+   builtin and then its argument prototype would still apply.
+   The 'extern "C"' is for builds by C++ compilers;
+   although this is not generally supported in C code supporting it here
+   has little cost and some practical benefit (sr 110532).  */
+#ifdef __cplusplus
+extern "C"
+#endif
+char XScreenSaverQueryInfo (void);
 int
 main (void)
 {
@@ -8462,12 +8725,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_lib_Xss_XScreenSaverQueryInfo=yes
-else $as_nop
-  ac_cv_lib_Xss_XScreenSaverQueryInfo=no
+else case e in #(
+  e) ac_cv_lib_Xss_XScreenSaverQueryInfo=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-LIBS=$ac_check_lib_save_LIBS
+LIBS=$ac_check_lib_save_LIBS ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_lib_Xss_XScreenSaverQueryInfo" >&5
 printf "%s\n" "$ac_cv_lib_Xss_XScreenSaverQueryInfo" >&6; }
@@ -8485,10 +8750,12 @@ then :
 
 fi
 
-
+	     ;;
+esac
 fi
 
-
+	 ;;
+esac
 fi
 
     fi
@@ -8511,8 +8778,8 @@ printf %s "checking whether char is unsigned... " >&6; }
 if test ${ac_cv_c_char_unsigned+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $ac_includes_default
 int
@@ -8529,10 +8796,12 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_c_char_unsigned=no
-else $as_nop
-  ac_cv_c_char_unsigned=yes
+else case e in #(
+  e) ac_cv_c_char_unsigned=yes ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_char_unsigned" >&5
 printf "%s\n" "$ac_cv_c_char_unsigned" >&6; }
@@ -8588,8 +8857,9 @@ printf %s "checking how to package libraries... " >&6; }
 if test ${enable_framework+y}
 then :
   enableval=$enable_framework; enable_framework=$enableval
-else $as_nop
-  enable_framework=no
+else case e in #(
+  e) enable_framework=no ;;
+esac
 fi
 
 	if test $enable_framework = yes; then
@@ -8718,8 +8988,9 @@ fi
 if test ${enable_zipfs+y}
 then :
   enableval=$enable_zipfs; tcl_ok=$enableval
-else $as_nop
-  tcl_ok=yes
+else case e in #(
+  e) tcl_ok=yes ;;
+esac
 fi
 
 if test "$tcl_ok" = "yes" -a "x$enable_framework" != "xyes"; then
@@ -8736,8 +9007,8 @@ printf %s "checking for gcc... " >&6; }
         if test ${ac_cv_path_cc+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
             search_path=`echo ${PATH} | sed -e 's/:/ /g'`
             for dir in $search_path ; do
                 for j in `ls -r $dir/gcc 2> /dev/null` \
@@ -8750,7 +9021,8 @@ else $as_nop
                     fi
                 done
             done
-
+         ;;
+esac
 fi
 
       fi
@@ -8767,8 +9039,8 @@ printf %s "checking for build system executable suffix... " >&6; }
 if test ${bfd_cv_build_exeext+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  rm -f conftest*
+else case e in #(
+  e) rm -f conftest*
          echo 'int main () { return 0; }' > conftest.c
          bfd_cv_build_exeext=
          ${CC_FOR_BUILD} -o conftest conftest.c 1>&5 2>&5
@@ -8779,7 +9051,8 @@ else $as_nop
            esac
          done
          rm -f conftest*
-         test x"${bfd_cv_build_exeext}" = x && bfd_cv_build_exeext=no
+         test x"${bfd_cv_build_exeext}" = x && bfd_cv_build_exeext=no ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $bfd_cv_build_exeext" >&5
 printf "%s\n" "$bfd_cv_build_exeext" >&6; }
@@ -8802,8 +9075,8 @@ printf %s "checking for macher... " >&6; }
     if test ${ac_cv_path_macher+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
     search_path=`echo ${PATH} | sed -e 's/:/ /g'`
     for dir in $search_path ; do
         for j in `ls -r $dir/macher 2> /dev/null` \
@@ -8816,7 +9089,8 @@ else $as_nop
         fi
         done
     done
-
+     ;;
+esac
 fi
 
     if test -f "$ac_cv_path_macher" ; then
@@ -8831,8 +9105,8 @@ printf %s "checking for zip... " >&6; }
     if test ${ac_cv_path_zip+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
     search_path=`echo ${PATH} | sed -e 's/:/ /g'`
     for dir in $search_path ; do
         for j in `ls -r $dir/zip 2> /dev/null` \
@@ -8845,7 +9119,8 @@ else $as_nop
         fi
         done
     done
-
+     ;;
+esac
 fi
 
     if test -f "$ac_cv_path_zip" ; then
@@ -9022,8 +9297,8 @@ cat >confcache <<\_ACEOF
 # config.status only pays attention to the cache file if you give it
 # the --recheck option to rerun configure.
 #
-# `ac_cv_env_foo' variables (set or unset) will be overridden when
-# loading this file, other *unset* `ac_cv_foo' will be assigned the
+# 'ac_cv_env_foo' variables (set or unset) will be overridden when
+# loading this file, other *unset* 'ac_cv_foo' will be assigned the
 # following values.
 
 _ACEOF
@@ -9053,14 +9328,14 @@ printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;}
   (set) 2>&1 |
     case $as_nl`(ac_space=' '; set) 2>&1` in #(
     *${as_nl}ac_space=\ *)
-      # `set' does not quote correctly, so add quotes: double-quote
+      # 'set' does not quote correctly, so add quotes: double-quote
       # substitution turns \\\\ into \\, and sed turns \\ into \.
       sed -n \
 	"s/'/'\\\\''/g;
 	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
       ;; #(
     *)
-      # `set' quotes correctly as required by POSIX, so do not add quotes.
+      # 'set' quotes correctly as required by POSIX, so do not add quotes.
       sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
       ;;
     esac |
@@ -9124,9 +9399,7 @@ s/^[	 ]*#[	 ]*define[	 ][	 ]*\([^	 ][^	 ]*\)[	 ]*\(.*\)/-D\1=\2/g
 t quote
 b any
 :quote
-s/[	 `~#$^&*(){}\\|;'\''"<>?]/\\&/g
-s/\[/\\&/g
-s/\]/\\&/g
+s/[][	 `~#$^&*(){}\\|;'\''"<>?]/\\&/g
 s/\$/$$/g
 H
 :any
@@ -9187,7 +9460,6 @@ cat >>$CONFIG_STATUS <<\_ASEOF || as_write_fail=1
 
 # Be more Bourne compatible
 DUALCASE=1; export DUALCASE # for MKS sh
-as_nop=:
 if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
 then :
   emulate sh
@@ -9196,12 +9468,13 @@ then :
   # is contrary to our usage.  Disable this feature.
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
-else $as_nop
-  case `(set -o) 2>/dev/null` in #(
+else case e in #(
+  e) case `(set -o) 2>/dev/null` in #(
   *posix*) :
     set -o posix ;; #(
   *) :
      ;;
+esac ;;
 esac
 fi
 
@@ -9273,7 +9546,7 @@ IFS=$as_save_IFS
 
      ;;
 esac
-# We did not find ourselves, most probably we were run as `sh COMMAND'
+# We did not find ourselves, most probably we were run as 'sh COMMAND'
 # in which case we are not to be found in the path.
 if test "x$as_myself" = x; then
   as_myself=$0
@@ -9302,7 +9575,6 @@ as_fn_error ()
 } # as_fn_error
 
 
-
 # as_fn_set_status STATUS
 # -----------------------
 # Set $? to STATUS, without forking.
@@ -9342,11 +9614,12 @@ then :
   {
     eval $1+=\$2
   }'
-else $as_nop
-  as_fn_append ()
+else case e in #(
+  e) as_fn_append ()
   {
     eval $1=\$$1\$2
-  }
+  } ;;
+esac
 fi # as_fn_append
 
 # as_fn_arith ARG...
@@ -9360,11 +9633,12 @@ then :
   {
     as_val=$(( $* ))
   }'
-else $as_nop
-  as_fn_arith ()
+else case e in #(
+  e) as_fn_arith ()
   {
     as_val=`expr "$@" || test $? -eq 1`
-  }
+  } ;;
+esac
 fi # as_fn_arith
 
 
@@ -9447,9 +9721,9 @@ if (echo >conf$$.file) 2>/dev/null; then
   if ln -s conf$$.file conf$$ 2>/dev/null; then
     as_ln_s='ln -s'
     # ... but there are two gotchas:
-    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
-    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
-    # In both cases, we have to default to `cp -pR'.
+    # 1) On MSYS, both 'ln -s file dir' and 'ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; 'ln -s' creates a wrapper executable.
+    # In both cases, we have to default to 'cp -pR'.
     ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
       as_ln_s='cp -pR'
   elif ln conf$$.file conf$$ 2>/dev/null; then
@@ -9530,10 +9804,12 @@ as_test_x='test -x'
 as_executable_p=as_fn_executable_p
 
 # Sed expression to map a string onto a valid CPP name.
-as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+as_sed_cpp="y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g"
+as_tr_cpp="eval sed '$as_sed_cpp'" # deprecated
 
 # Sed expression to map a string onto a valid variable name.
-as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+as_sed_sh="y%*+%pp%;s%[^_$as_cr_alnum]%_%g"
+as_tr_sh="eval sed '$as_sed_sh'" # deprecated
 
 
 exec 6>&1
@@ -9549,7 +9825,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # values after options handling.
 ac_log="
 This file was extended by tk $as_me 8.7, which was
-generated by GNU Autoconf 2.71.  Invocation command line was
+generated by GNU Autoconf 2.72.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
   CONFIG_HEADERS  = $CONFIG_HEADERS
@@ -9577,7 +9853,7 @@ _ACEOF
 
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 ac_cs_usage="\
-\`$as_me' instantiates files and other configuration actions
+'$as_me' instantiates files and other configuration actions
 from templates according to the current configuration.  Unless the files
 and actions are specified as TAGs, all are instantiated by default.
 
@@ -9608,10 +9884,10 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
 tk config.status 8.7
-configured by $0, generated by GNU Autoconf 2.71,
+configured by $0, generated by GNU Autoconf 2.72,
   with options \\"\$ac_cs_config\\"
 
-Copyright (C) 2021 Free Software Foundation, Inc.
+Copyright (C) 2023 Free Software Foundation, Inc.
 This config.status script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it."
 
@@ -9668,8 +9944,8 @@ do
     ac_cs_silent=: ;;
 
   # This is an error.
-  -*) as_fn_error $? "unrecognized option: \`$1'
-Try \`$0 --help' for more information." ;;
+  -*) as_fn_error $? "unrecognized option: '$1'
+Try '$0 --help' for more information." ;;
 
   *) as_fn_append ac_config_targets " $1"
      ac_need_defaults=false ;;
@@ -9730,7 +10006,7 @@ do
     "tkConfig.sh") CONFIG_FILES="$CONFIG_FILES tkConfig.sh:../unix/tkConfig.sh.in" ;;
     "tk.pc") CONFIG_FILES="$CONFIG_FILES tk.pc:../unix/tk.pc.in" ;;
 
-  *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
+  *) as_fn_error $? "invalid argument: '$ac_config_target'" "$LINENO" 5;;
   esac
 done
 
@@ -9749,7 +10025,7 @@ fi
 # creating and moving files from /tmp can sometimes cause problems.
 # Hook for its removal unless debugging.
 # Note that there is a small window in which the directory will not be cleaned:
-# after its creation but before its name has been assigned to `$tmp'.
+# after its creation but before its name has been assigned to '$tmp'.
 $debug ||
 {
   tmp= ac_tmp=
@@ -9773,7 +10049,7 @@ ac_tmp=$tmp
 
 # Set up the scripts for CONFIG_FILES section.
 # No need to generate them if there are no CONFIG_FILES.
-# This happens for instance with `./config.status config.h'.
+# This happens for instance with './config.status config.h'.
 if test -n "$CONFIG_FILES"; then
 
 
@@ -9939,7 +10215,7 @@ do
   esac
   case $ac_mode$ac_tag in
   :[FHL]*:*);;
-  :L* | :C*:*) as_fn_error $? "invalid tag \`$ac_tag'" "$LINENO" 5;;
+  :L* | :C*:*) as_fn_error $? "invalid tag '$ac_tag'" "$LINENO" 5;;
   :[FH]-) ac_tag=-:-;;
   :[FH]*) ac_tag=$ac_tag:$ac_tag.in;;
   esac
@@ -9961,19 +10237,19 @@ do
       -) ac_f="$ac_tmp/stdin";;
       *) # Look for the file first in the build tree, then in the source tree
 	 # (if the path is not absolute).  The absolute path cannot be DOS-style,
-	 # because $ac_f cannot contain `:'.
+	 # because $ac_f cannot contain ':'.
 	 test -f "$ac_f" ||
 	   case $ac_f in
 	   [\\/$]*) false;;
 	   *) test -f "$srcdir/$ac_f" && ac_f="$srcdir/$ac_f";;
 	   esac ||
-	   as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5;;
+	   as_fn_error 1 "cannot find input file: '$ac_f'" "$LINENO" 5;;
       esac
       case $ac_f in *\'*) ac_f=`printf "%s\n" "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
       as_fn_append ac_file_inputs " '$ac_f'"
     done
 
-    # Let's still pretend it is `configure' which instantiates (i.e., don't
+    # Let's still pretend it is 'configure' which instantiates (i.e., don't
     # use $as_me), people would be surprised to read:
     #    /* config.h.  Generated by config.status.  */
     configure_input='Generated from '`
@@ -10097,7 +10373,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 esac
 _ACEOF
 
-# Neutralize VPATH when `$srcdir' = `.'.
+# Neutralize VPATH when '$srcdir' = '.'.
 # Shell code in configure.ac might set extrasub.
 # FIXME: do we really want to maintain this feature?
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
@@ -10126,9 +10402,9 @@ test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
   { ac_out=`sed -n '/\${datarootdir}/p' "$ac_tmp/out"`; test -n "$ac_out"; } &&
   { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' \
       "$ac_tmp/out"`; test -z "$ac_out"; } &&
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable 'datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&5
-printf "%s\n" "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+printf "%s\n" "$as_me: WARNING: $ac_file contains a reference to the variable 'datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&2;}
 
   rm -f "$ac_tmp/stdin"
diff --git a/win/configure b/win/configure
index ba80bbb..b8d2639 100755
--- a/win/configure
+++ b/win/configure
@@ -1,9 +1,9 @@
 #! /bin/sh
 # Guess values for system-dependent variables and create Makefiles.
-# Generated by GNU Autoconf 2.71 for tk 8.7.
+# Generated by GNU Autoconf 2.72 for tk 8.7.
 #
 #
-# Copyright (C) 1992-1996, 1998-2017, 2020-2021 Free Software Foundation,
+# Copyright (C) 1992-1996, 1998-2017, 2020-2023 Free Software Foundation,
 # Inc.
 #
 #
@@ -15,7 +15,6 @@
 
 # Be more Bourne compatible
 DUALCASE=1; export DUALCASE # for MKS sh
-as_nop=:
 if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
 then :
   emulate sh
@@ -24,12 +23,13 @@ then :
   # is contrary to our usage.  Disable this feature.
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
-else $as_nop
-  case `(set -o) 2>/dev/null` in #(
+else case e in #(
+  e) case `(set -o) 2>/dev/null` in #(
   *posix*) :
     set -o posix ;; #(
   *) :
      ;;
+esac ;;
 esac
 fi
 
@@ -101,7 +101,7 @@ IFS=$as_save_IFS
 
      ;;
 esac
-# We did not find ourselves, most probably we were run as `sh COMMAND'
+# We did not find ourselves, most probably we were run as 'sh COMMAND'
 # in which case we are not to be found in the path.
 if test "x$as_myself" = x; then
   as_myself=$0
@@ -131,15 +131,14 @@ case $- in # ((((
 esac
 exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
 # Admittedly, this is quite paranoid, since all the known shells bail
-# out after a failed `exec'.
+# out after a failed 'exec'.
 printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
 exit 255
   fi
   # We don't want this to propagate to other subprocesses.
           { _as_can_reexec=; unset _as_can_reexec;}
 if test "x$CONFIG_SHELL" = x; then
-  as_bourne_compatible="as_nop=:
-if test \${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
+  as_bourne_compatible="if test \${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
 then :
   emulate sh
   NULLCMD=:
@@ -147,12 +146,13 @@ then :
   # is contrary to our usage.  Disable this feature.
   alias -g '\${1+\"\$@\"}'='\"\$@\"'
   setopt NO_GLOB_SUBST
-else \$as_nop
-  case \`(set -o) 2>/dev/null\` in #(
+else case e in #(
+  e) case \`(set -o) 2>/dev/null\` in #(
   *posix*) :
     set -o posix ;; #(
   *) :
      ;;
+esac ;;
 esac
 fi
 "
@@ -170,8 +170,9 @@ as_fn_ret_failure && { exitcode=1; echo as_fn_ret_failure succeeded.; }
 if ( set x; as_fn_ret_success y && test x = \"\$1\" )
 then :
 
-else \$as_nop
-  exitcode=1; echo positional parameters were not saved.
+else case e in #(
+  e) exitcode=1; echo positional parameters were not saved. ;;
+esac
 fi
 test x\$exitcode = x0 || exit 1
 blah=\$(echo \$(echo blah))
@@ -185,14 +186,15 @@ test \$(( 1 + 1 )) = 2 || exit 1"
   if (eval "$as_required") 2>/dev/null
 then :
   as_have_required=yes
-else $as_nop
-  as_have_required=no
+else case e in #(
+  e) as_have_required=no ;;
+esac
 fi
   if test x$as_have_required = xyes && (eval "$as_suggested") 2>/dev/null
 then :
 
-else $as_nop
-  as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
+else case e in #(
+  e) as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 as_found=false
 for as_dir in /bin$PATH_SEPARATOR/usr/bin$PATH_SEPARATOR$PATH
 do
@@ -225,12 +227,13 @@ IFS=$as_save_IFS
 if $as_found
 then :
 
-else $as_nop
-  if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
+else case e in #(
+  e) if { test -f "$SHELL" || test -f "$SHELL.exe"; } &&
 	      as_run=a "$SHELL" -c "$as_bourne_compatible""$as_required" 2>/dev/null
 then :
   CONFIG_SHELL=$SHELL as_have_required=yes
-fi
+fi ;;
+esac
 fi
 
 
@@ -252,7 +255,7 @@ case $- in # ((((
 esac
 exec $CONFIG_SHELL $as_opts "$as_myself" ${1+"$@"}
 # Admittedly, this is quite paranoid, since all the known shells bail
-# out after a failed `exec'.
+# out after a failed 'exec'.
 printf "%s\n" "$0: could not re-execute with $CONFIG_SHELL" >&2
 exit 255
 fi
@@ -271,7 +274,8 @@ $0: message. Then install a modern shell, or manually run
 $0: the script under such a shell if you do have one."
   fi
   exit 1
-fi
+fi ;;
+esac
 fi
 fi
 SHELL=${CONFIG_SHELL-/bin/sh}
@@ -310,14 +314,6 @@ as_fn_exit ()
   as_fn_set_status $1
   exit $1
 } # as_fn_exit
-# as_fn_nop
-# ---------
-# Do nothing but, unlike ":", preserve the value of $?.
-as_fn_nop ()
-{
-  return $?
-}
-as_nop=as_fn_nop
 
 # as_fn_mkdir_p
 # -------------
@@ -386,11 +382,12 @@ then :
   {
     eval $1+=\$2
   }'
-else $as_nop
-  as_fn_append ()
+else case e in #(
+  e) as_fn_append ()
   {
     eval $1=\$$1\$2
-  }
+  } ;;
+esac
 fi # as_fn_append
 
 # as_fn_arith ARG...
@@ -404,21 +401,14 @@ then :
   {
     as_val=$(( $* ))
   }'
-else $as_nop
-  as_fn_arith ()
+else case e in #(
+  e) as_fn_arith ()
   {
     as_val=`expr "$@" || test $? -eq 1`
-  }
+  } ;;
+esac
 fi # as_fn_arith
 
-# as_fn_nop
-# ---------
-# Do nothing but, unlike ":", preserve the value of $?.
-as_fn_nop ()
-{
-  return $?
-}
-as_nop=as_fn_nop
 
 # as_fn_error STATUS ERROR [LINENO LOG_FD]
 # ----------------------------------------
@@ -492,6 +482,8 @@ as_cr_alnum=$as_cr_Letters$as_cr_digits
     /[$]LINENO/=
   ' <$as_myself |
     sed '
+      t clear
+      :clear
       s/[$]LINENO.*/&-/
       t lineno
       b
@@ -540,7 +532,6 @@ esac
 as_echo='printf %s\n'
 as_echo_n='printf %s'
 
-
 rm -f conf$$ conf$$.exe conf$$.file
 if test -d conf$$.dir; then
   rm -f conf$$.dir/conf$$.file
@@ -552,9 +543,9 @@ if (echo >conf$$.file) 2>/dev/null; then
   if ln -s conf$$.file conf$$ 2>/dev/null; then
     as_ln_s='ln -s'
     # ... but there are two gotchas:
-    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
-    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
-    # In both cases, we have to default to `cp -pR'.
+    # 1) On MSYS, both 'ln -s file dir' and 'ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; 'ln -s' creates a wrapper executable.
+    # In both cases, we have to default to 'cp -pR'.
     ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
       as_ln_s='cp -pR'
   elif ln conf$$.file conf$$ 2>/dev/null; then
@@ -579,10 +570,12 @@ as_test_x='test -x'
 as_executable_p=as_fn_executable_p
 
 # Sed expression to map a string onto a valid CPP name.
-as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+as_sed_cpp="y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g"
+as_tr_cpp="eval sed '$as_sed_cpp'" # deprecated
 
 # Sed expression to map a string onto a valid variable name.
-as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+as_sed_sh="y%*+%pp%;s%[^_$as_cr_alnum]%_%g"
+as_tr_sh="eval sed '$as_sed_sh'" # deprecated
 
 
 test -n "$DJDIR" || exec 7<&0 </dev/null
@@ -722,8 +715,6 @@ TCLSH_PROG
 BUILD_TCLSH
 VC_MANIFEST_EMBED_EXE
 VC_MANIFEST_EMBED_DLL
-EGREP
-GREP
 CPP
 LDFLAGS_DEFAULT
 CFLAGS_DEFAULT
@@ -924,7 +915,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*disable-\(.*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid feature name: \`$ac_useropt'"
+      as_fn_error $? "invalid feature name: '$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -950,7 +941,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*enable-\([^=]*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid feature name: \`$ac_useropt'"
+      as_fn_error $? "invalid feature name: '$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -1163,7 +1154,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*with-\([^=]*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid package name: \`$ac_useropt'"
+      as_fn_error $? "invalid package name: '$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -1179,7 +1170,7 @@ do
     ac_useropt=`expr "x$ac_option" : 'x-*without-\(.*\)'`
     # Reject names that are not valid shell variable names.
     expr "x$ac_useropt" : ".*[^-+._$as_cr_alnum]" >/dev/null &&
-      as_fn_error $? "invalid package name: \`$ac_useropt'"
+      as_fn_error $? "invalid package name: '$ac_useropt'"
     ac_useropt_orig=$ac_useropt
     ac_useropt=`printf "%s\n" "$ac_useropt" | sed 's/[-+.]/_/g'`
     case $ac_user_opts in
@@ -1209,8 +1200,8 @@ do
   | --x-librar=* | --x-libra=* | --x-libr=* | --x-lib=* | --x-li=* | --x-l=*)
     x_libraries=$ac_optarg ;;
 
-  -*) as_fn_error $? "unrecognized option: \`$ac_option'
-Try \`$0 --help' for more information"
+  -*) as_fn_error $? "unrecognized option: '$ac_option'
+Try '$0 --help' for more information"
     ;;
 
   *=*)
@@ -1218,7 +1209,7 @@ Try \`$0 --help' for more information"
     # Reject names that are not valid shell variable names.
     case $ac_envvar in #(
       '' | [0-9]* | *[!_$as_cr_alnum]* )
-      as_fn_error $? "invalid variable name: \`$ac_envvar'" ;;
+      as_fn_error $? "invalid variable name: '$ac_envvar'" ;;
     esac
     eval $ac_envvar=\$ac_optarg
     export $ac_envvar ;;
@@ -1268,7 +1259,7 @@ do
   as_fn_error $? "expected an absolute directory name for --$ac_var: $ac_val"
 done
 
-# There might be people who depend on the old broken behavior: `$host'
+# There might be people who depend on the old broken behavior: '$host'
 # used to hold the argument of --host etc.
 # FIXME: To remove some day.
 build=$build_alias
@@ -1336,7 +1327,7 @@ if test ! -r "$srcdir/$ac_unique_file"; then
   test "$ac_srcdir_defaulted" = yes && srcdir="$ac_confdir or .."
   as_fn_error $? "cannot find sources ($ac_unique_file) in $srcdir"
 fi
-ac_msg="sources are in $srcdir, but \`cd $srcdir' does not work"
+ac_msg="sources are in $srcdir, but 'cd $srcdir' does not work"
 ac_abs_confdir=`(
 	cd "$srcdir" && test -r "./$ac_unique_file" || as_fn_error $? "$ac_msg"
 	pwd)`
@@ -1364,7 +1355,7 @@ if test "$ac_init_help" = "long"; then
   # Omit some internal or obsolete options to make the list less imposing.
   # This message is too long to be a string in the A/UX 3.1 sh.
   cat <<_ACEOF
-\`configure' configures tk 8.7 to adapt to many kinds of systems.
+'configure' configures tk 8.7 to adapt to many kinds of systems.
 
 Usage: $0 [OPTION]... [VAR=VALUE]...
 
@@ -1378,11 +1369,11 @@ Configuration:
       --help=short        display options specific to this package
       --help=recursive    display the short help of all the included packages
   -V, --version           display version information and exit
-  -q, --quiet, --silent   do not print \`checking ...' messages
+  -q, --quiet, --silent   do not print 'checking ...' messages
       --cache-file=FILE   cache test results in FILE [disabled]
-  -C, --config-cache      alias for \`--cache-file=config.cache'
+  -C, --config-cache      alias for '--cache-file=config.cache'
   -n, --no-create         do not create output files
-      --srcdir=DIR        find the sources in DIR [configure dir or \`..']
+      --srcdir=DIR        find the sources in DIR [configure dir or '..']
 
 Installation directories:
   --prefix=PREFIX         install architecture-independent files in PREFIX
@@ -1390,10 +1381,10 @@ Installation directories:
   --exec-prefix=EPREFIX   install architecture-dependent files in EPREFIX
                           [PREFIX]
 
-By default, \`make install' will install all the files in
-\`$ac_default_prefix/bin', \`$ac_default_prefix/lib' etc.  You can specify
-an installation prefix other than \`$ac_default_prefix' using \`--prefix',
-for instance \`--prefix=\$HOME'.
+By default, 'make install' will install all the files in
+'$ac_default_prefix/bin', '$ac_default_prefix/lib' etc.  You can specify
+an installation prefix other than '$ac_default_prefix' using '--prefix',
+for instance '--prefix=\$HOME'.
 
 For better control, use the options below.
 
@@ -1457,7 +1448,7 @@ Some influential environment variables:
               you have headers in a nonstandard directory <include dir>
   CPP         C preprocessor
 
-Use these variables to override the choices made by `configure' or to help
+Use these variables to override the choices made by 'configure' or to help
 it to find libraries and programs with nonstandard names/locations.
 
 Report bugs to the package provider.
@@ -1525,9 +1516,9 @@ test -n "$ac_init_help" && exit $ac_status
 if $ac_init_version; then
   cat <<\_ACEOF
 tk configure 8.7
-generated by GNU Autoconf 2.71
+generated by GNU Autoconf 2.72
 
-Copyright (C) 2021 Free Software Foundation, Inc.
+Copyright (C) 2023 Free Software Foundation, Inc.
 This configure script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it.
 _ACEOF
@@ -1566,11 +1557,12 @@ printf "%s\n" "$ac_try_echo"; } >&5
        } && test -s conftest.$ac_objext
 then :
   ac_retval=0
-else $as_nop
-  printf "%s\n" "$as_me: failed program was:" >&5
+else case e in #(
+  e) printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-	ac_retval=1
+	ac_retval=1 ;;
+esac
 fi
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
@@ -1589,8 +1581,8 @@ printf %s "checking for $2... " >&6; }
 if eval test \${$3+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
 #include <$2>
@@ -1598,10 +1590,12 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   eval "$3=yes"
-else $as_nop
-  eval "$3=no"
+else case e in #(
+  e) eval "$3=no" ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 eval ac_res=\$$3
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
@@ -1622,8 +1616,8 @@ printf %s "checking for $2... " >&6; }
 if eval test \${$3+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  eval "$3=no"
+else case e in #(
+  e) eval "$3=no"
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 $4
@@ -1653,12 +1647,14 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
-else $as_nop
-  eval "$3=yes"
+else case e in #(
+  e) eval "$3=yes" ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 eval ac_res=\$$3
 	       { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_res" >&5
@@ -1694,11 +1690,12 @@ printf "%s\n" "$ac_try_echo"; } >&5
        }
 then :
   ac_retval=0
-else $as_nop
-  printf "%s\n" "$as_me: failed program was:" >&5
+else case e in #(
+  e) printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-    ac_retval=1
+    ac_retval=1 ;;
+esac
 fi
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
   as_fn_set_status $ac_retval
@@ -1729,7 +1726,7 @@ This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
 
 It was created by tk $as_me 8.7, which was
-generated by GNU Autoconf 2.71.  Invocation command line was
+generated by GNU Autoconf 2.72.  Invocation command line was
 
   $ $0$ac_configure_args_raw
 
@@ -1975,10 +1972,10 @@ esac
 printf "%s\n" "$as_me: loading site script $ac_site_file" >&6;}
     sed 's/^/| /' "$ac_site_file" >&5
     . "$ac_site_file" \
-      || { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+      || { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "failed to load site script $ac_site_file
-See \`config.log' for more details" "$LINENO" 5; }
+See 'config.log' for more details" "$LINENO" 5; }
   fi
 done
 
@@ -2014,9 +2011,7 @@ struct stat;
 /* Most of the following tests are stolen from RCS 5.7 src/conf.sh.  */
 struct buf { int x; };
 struct buf * (*rcsopen) (struct buf *, struct stat *, int);
-static char *e (p, i)
-     char **p;
-     int i;
+static char *e (char **p, int i)
 {
   return p[i];
 }
@@ -2030,6 +2025,21 @@ static char *f (char * (*g) (char **, int), char **p, ...)
   return s;
 }
 
+/* C89 style stringification. */
+#define noexpand_stringify(a) #a
+const char *stringified = noexpand_stringify(arbitrary+token=sequence);
+
+/* C89 style token pasting.  Exercises some of the corner cases that
+   e.g. old MSVC gets wrong, but not very hard. */
+#define noexpand_concat(a,b) a##b
+#define expand_concat(a,b) noexpand_concat(a,b)
+extern int vA;
+extern int vbee;
+#define aye A
+#define bee B
+int *pvA = &expand_concat(v,aye);
+int *pvbee = &noexpand_concat(v,bee);
+
 /* OSF 4.0 Compaq cc is some sort of almost-ANSI by default.  It has
    function prototypes and stuff, but not \xHH hex character constants.
    These do not provoke an error unfortunately, instead are silently treated
@@ -2057,16 +2067,19 @@ ok |= (argc == 0 || f (e, argv, 0) != argv[0] || f (e, argv, 1) != argv[1]);
 
 # Test code for whether the C compiler supports C99 (global declarations)
 ac_c_conftest_c99_globals='
-// Does the compiler advertise C99 conformance?
+/* Does the compiler advertise C99 conformance? */
 #if !defined __STDC_VERSION__ || __STDC_VERSION__ < 199901L
 # error "Compiler does not advertise C99 conformance"
 #endif
 
+// See if C++-style comments work.
+
 #include <stdbool.h>
 extern int puts (const char *);
 extern int printf (const char *, ...);
 extern int dprintf (int, const char *, ...);
 extern void *malloc (size_t);
+extern void free (void *);
 
 // Check varargs macros.  These examples are taken from C99 6.10.3.5.
 // dprintf is used instead of fprintf to avoid needing to declare
@@ -2116,7 +2129,6 @@ typedef const char *ccp;
 static inline int
 test_restrict (ccp restrict text)
 {
-  // See if C++-style comments work.
   // Iterate through items via the restricted pointer.
   // Also check for declarations in for loops.
   for (unsigned int i = 0; *(text+i) != '\''\0'\''; ++i)
@@ -2182,6 +2194,8 @@ ac_c_conftest_c99_main='
   ia->datasize = 10;
   for (int i = 0; i < ia->datasize; ++i)
     ia->data[i] = i * 1.234;
+  // Work around memory leak warnings.
+  free (ia);
 
   // Check named initializers.
   struct named_init ni = {
@@ -2203,7 +2217,7 @@ ac_c_conftest_c99_main='
 
 # Test code for whether the C compiler supports C11 (global declarations)
 ac_c_conftest_c11_globals='
-// Does the compiler advertise C11 conformance?
+/* Does the compiler advertise C11 conformance? */
 #if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112L
 # error "Compiler does not advertise C11 conformance"
 #endif
@@ -2326,12 +2340,12 @@ for ac_var in $ac_precious_vars; do
   eval ac_new_val=\$ac_env_${ac_var}_value
   case $ac_old_set,$ac_new_set in
     set,)
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&5
-printf "%s\n" "$as_me: error: \`$ac_var' was set to \`$ac_old_val' in the previous run" >&2;}
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: '$ac_var' was set to '$ac_old_val' in the previous run" >&5
+printf "%s\n" "$as_me: error: '$ac_var' was set to '$ac_old_val' in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,set)
-      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' was not set in the previous run" >&5
-printf "%s\n" "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
+      { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: '$ac_var' was not set in the previous run" >&5
+printf "%s\n" "$as_me: error: '$ac_var' was not set in the previous run" >&2;}
       ac_cache_corrupted=: ;;
     ,);;
     *)
@@ -2340,18 +2354,18 @@ printf "%s\n" "$as_me: error: \`$ac_var' was not set in the previous run" >&2;}
 	ac_old_val_w=`echo x $ac_old_val`
 	ac_new_val_w=`echo x $ac_new_val`
 	if test "$ac_old_val_w" != "$ac_new_val_w"; then
-	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: \`$ac_var' has changed since the previous run:" >&5
-printf "%s\n" "$as_me: error: \`$ac_var' has changed since the previous run:" >&2;}
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: '$ac_var' has changed since the previous run:" >&5
+printf "%s\n" "$as_me: error: '$ac_var' has changed since the previous run:" >&2;}
 	  ac_cache_corrupted=:
 	else
-	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&5
-printf "%s\n" "$as_me: warning: ignoring whitespace changes in \`$ac_var' since the previous run:" >&2;}
+	  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: warning: ignoring whitespace changes in '$ac_var' since the previous run:" >&5
+printf "%s\n" "$as_me: warning: ignoring whitespace changes in '$ac_var' since the previous run:" >&2;}
 	  eval $ac_var=\$ac_old_val
 	fi
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   former value:  \`$ac_old_val'" >&5
-printf "%s\n" "$as_me:   former value:  \`$ac_old_val'" >&2;}
-	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   current value: \`$ac_new_val'" >&5
-printf "%s\n" "$as_me:   current value: \`$ac_new_val'" >&2;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   former value:  '$ac_old_val'" >&5
+printf "%s\n" "$as_me:   former value:  '$ac_old_val'" >&2;}
+	{ printf "%s\n" "$as_me:${as_lineno-$LINENO}:   current value: '$ac_new_val'" >&5
+printf "%s\n" "$as_me:   current value: '$ac_new_val'" >&2;}
       fi;;
   esac
   # Pass precious variables to config.status.
@@ -2367,11 +2381,11 @@ printf "%s\n" "$as_me:   current value: \`$ac_new_val'" >&2;}
   fi
 done
 if $ac_cache_corrupted; then
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: changes in the environment can compromise the build" >&5
 printf "%s\n" "$as_me: error: changes in the environment can compromise the build" >&2;}
-  as_fn_error $? "run \`${MAKE-make} distclean' and/or \`rm $cache_file'
+  as_fn_error $? "run '${MAKE-make} distclean' and/or 'rm $cache_file'
 	    and start over" "$LINENO" 5
 fi
 ## -------------------- ##
@@ -2444,8 +2458,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$CC"; then
+else case e in #(
+  e) if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2467,7 +2481,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -2489,8 +2504,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_CC"; then
+else case e in #(
+  e) if test -n "$ac_ct_CC"; then
   ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2512,7 +2527,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
@@ -2547,8 +2563,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$CC"; then
+else case e in #(
+  e) if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2570,7 +2586,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -2592,8 +2609,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$CC"; then
+else case e in #(
+  e) if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
   ac_prog_rejected=no
@@ -2632,7 +2649,8 @@ if test $ac_prog_rejected = yes; then
     ac_cv_prog_CC="$as_dir$ac_word${1+' '}$@"
   fi
 fi
-fi
+fi ;;
+esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -2656,8 +2674,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$CC"; then
+else case e in #(
+  e) if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2679,7 +2697,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -2705,8 +2724,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_CC"; then
+else case e in #(
+  e) if test -n "$ac_ct_CC"; then
   ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2728,7 +2747,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
@@ -2766,8 +2786,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$CC"; then
+else case e in #(
+  e) if test -n "$CC"; then
   ac_cv_prog_CC="$CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2789,7 +2809,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 CC=$ac_cv_prog_CC
 if test -n "$CC"; then
@@ -2811,8 +2832,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_CC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_CC"; then
+else case e in #(
+  e) if test -n "$ac_ct_CC"; then
   ac_cv_prog_ac_ct_CC="$ac_ct_CC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -2834,7 +2855,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 ac_ct_CC=$ac_cv_prog_ac_ct_CC
 if test -n "$ac_ct_CC"; then
@@ -2863,10 +2885,10 @@ fi
 fi
 
 
-test -z "$CC" && { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+test -z "$CC" && { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "no acceptable C compiler found in \$PATH
-See \`config.log' for more details" "$LINENO" 5; }
+See 'config.log' for more details" "$LINENO" 5; }
 
 # Provide some information about the compiler.
 printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler version" >&5
@@ -2938,8 +2960,8 @@ printf "%s\n" "$ac_try_echo"; } >&5
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 then :
-  # Autoconf-2.13 could set the ac_cv_exeext variable to `no'.
-# So ignore a value of `no', otherwise this would lead to `EXEEXT = no'
+  # Autoconf-2.13 could set the ac_cv_exeext variable to 'no'.
+# So ignore a value of 'no', otherwise this would lead to 'EXEEXT = no'
 # in a Makefile.  We should not override ac_cv_exeext if it was cached,
 # so that the user can short-circuit this test for compilers unknown to
 # Autoconf.
@@ -2959,7 +2981,7 @@ do
 	   ac_cv_exeext=`expr "$ac_file" : '[^.]*\(\..*\)'`
 	fi
 	# We set ac_cv_exeext here because the later test for it is not
-	# safe: cross compilers may not add the suffix if given an `-o'
+	# safe: cross compilers may not add the suffix if given an '-o'
 	# argument, so we may need to know it at that point already.
 	# Even if this section looks crufty: it has the advantage of
 	# actually working.
@@ -2970,8 +2992,9 @@ do
 done
 test "$ac_cv_exeext" = no && ac_cv_exeext=
 
-else $as_nop
-  ac_file=''
+else case e in #(
+  e) ac_file='' ;;
+esac
 fi
 if test -z "$ac_file"
 then :
@@ -2980,13 +3003,14 @@ printf "%s\n" "no" >&6; }
 printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error 77 "C compiler cannot create executables
-See \`config.log' for more details" "$LINENO" 5; }
-else $as_nop
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
-printf "%s\n" "yes" >&6; }
+See 'config.log' for more details" "$LINENO" 5; }
+else case e in #(
+  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
+printf "%s\n" "yes" >&6; } ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for C compiler default output file name" >&5
 printf %s "checking for C compiler default output file name... " >&6; }
@@ -3010,10 +3034,10 @@ printf "%s\n" "$ac_try_echo"; } >&5
   printf "%s\n" "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
   test $ac_status = 0; }
 then :
-  # If both `conftest.exe' and `conftest' are `present' (well, observable)
-# catch `conftest.exe'.  For instance with Cygwin, `ls conftest' will
-# work properly (i.e., refer to `conftest.exe'), while it won't with
-# `rm'.
+  # If both 'conftest.exe' and 'conftest' are 'present' (well, observable)
+# catch 'conftest.exe'.  For instance with Cygwin, 'ls conftest' will
+# work properly (i.e., refer to 'conftest.exe'), while it won't with
+# 'rm'.
 for ac_file in conftest.exe conftest conftest.*; do
   test -f "$ac_file" || continue
   case $ac_file in
@@ -3023,11 +3047,12 @@ for ac_file in conftest.exe conftest conftest.*; do
     * ) break;;
   esac
 done
-else $as_nop
-  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+else case e in #(
+  e) { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of executables: cannot compile and link
-See \`config.log' for more details" "$LINENO" 5; }
+See 'config.log' for more details" "$LINENO" 5; } ;;
+esac
 fi
 rm -f conftest conftest$ac_cv_exeext
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_exeext" >&5
@@ -3043,6 +3068,8 @@ int
 main (void)
 {
 FILE *f = fopen ("conftest.out", "w");
+ if (!f)
+  return 1;
  return ferror (f) || fclose (f) != 0;
 
   ;
@@ -3082,26 +3109,27 @@ printf "%s\n" "$ac_try_echo"; } >&5
     if test "$cross_compiling" = maybe; then
 	cross_compiling=yes
     else
-	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+	{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error 77 "cannot run C compiled programs.
-If you meant to cross compile, use \`--host'.
-See \`config.log' for more details" "$LINENO" 5; }
+If you meant to cross compile, use '--host'.
+See 'config.log' for more details" "$LINENO" 5; }
     fi
   fi
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $cross_compiling" >&5
 printf "%s\n" "$cross_compiling" >&6; }
 
-rm -f conftest.$ac_ext conftest$ac_cv_exeext conftest.out
+rm -f conftest.$ac_ext conftest$ac_cv_exeext \
+  conftest.o conftest.obj conftest.out
 ac_clean_files=$ac_clean_files_save
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for suffix of object files" >&5
 printf %s "checking for suffix of object files... " >&6; }
 if test ${ac_cv_objext+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -3133,16 +3161,18 @@ then :
        break;;
   esac
 done
-else $as_nop
-  printf "%s\n" "$as_me: failed program was:" >&5
+else case e in #(
+  e) printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+{ { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "cannot compute suffix of object files: cannot compile
-See \`config.log' for more details" "$LINENO" 5; }
+See 'config.log' for more details" "$LINENO" 5; } ;;
+esac
 fi
-rm -f conftest.$ac_cv_objext conftest.$ac_ext
+rm -f conftest.$ac_cv_objext conftest.$ac_ext ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_objext" >&5
 printf "%s\n" "$ac_cv_objext" >&6; }
@@ -3153,8 +3183,8 @@ printf %s "checking whether the compiler supports GNU C... " >&6; }
 if test ${ac_cv_c_compiler_gnu+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -3171,12 +3201,14 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_compiler_gnu=yes
-else $as_nop
-  ac_compiler_gnu=no
+else case e in #(
+  e) ac_compiler_gnu=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 ac_cv_c_compiler_gnu=$ac_compiler_gnu
-
+ ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_compiler_gnu" >&5
 printf "%s\n" "$ac_cv_c_compiler_gnu" >&6; }
@@ -3194,8 +3226,8 @@ printf %s "checking whether $CC accepts -g... " >&6; }
 if test ${ac_cv_prog_cc_g+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_save_c_werror_flag=$ac_c_werror_flag
+else case e in #(
+  e) ac_save_c_werror_flag=$ac_c_werror_flag
    ac_c_werror_flag=yes
    ac_cv_prog_cc_g=no
    CFLAGS="-g"
@@ -3213,8 +3245,8 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_prog_cc_g=yes
-else $as_nop
-  CFLAGS=""
+else case e in #(
+  e) CFLAGS=""
       cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
@@ -3229,8 +3261,8 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
 
-else $as_nop
-  ac_c_werror_flag=$ac_save_c_werror_flag
+else case e in #(
+  e) ac_c_werror_flag=$ac_save_c_werror_flag
 	 CFLAGS="-g"
 	 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3247,12 +3279,15 @@ if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_prog_cc_g=yes
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
-rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
+rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-   ac_c_werror_flag=$ac_save_c_werror_flag
+   ac_c_werror_flag=$ac_save_c_werror_flag ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_g" >&5
 printf "%s\n" "$ac_cv_prog_cc_g" >&6; }
@@ -3279,8 +3314,8 @@ printf %s "checking for $CC option to enable C11 features... " >&6; }
 if test ${ac_cv_prog_cc_c11+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_cv_prog_cc_c11=no
+else case e in #(
+  e) ac_cv_prog_cc_c11=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3297,25 +3332,28 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c11" != "xno" && break
 done
 rm -f conftest.$ac_ext
-CC=$ac_save_CC
+CC=$ac_save_CC ;;
+esac
 fi
 
 if test "x$ac_cv_prog_cc_c11" = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
 printf "%s\n" "unsupported" >&6; }
-else $as_nop
-  if test "x$ac_cv_prog_cc_c11" = x
+else case e in #(
+  e) if test "x$ac_cv_prog_cc_c11" = x
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
 printf "%s\n" "none needed" >&6; }
-else $as_nop
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
+else case e in #(
+  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c11" >&5
 printf "%s\n" "$ac_cv_prog_cc_c11" >&6; }
-     CC="$CC $ac_cv_prog_cc_c11"
+     CC="$CC $ac_cv_prog_cc_c11" ;;
+esac
 fi
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c11
-  ac_prog_cc_stdc=c11
+  ac_prog_cc_stdc=c11 ;;
+esac
 fi
 fi
 if test x$ac_prog_cc_stdc = xno
@@ -3325,8 +3363,8 @@ printf %s "checking for $CC option to enable C99 features... " >&6; }
 if test ${ac_cv_prog_cc_c99+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_cv_prog_cc_c99=no
+else case e in #(
+  e) ac_cv_prog_cc_c99=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3343,25 +3381,28 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c99" != "xno" && break
 done
 rm -f conftest.$ac_ext
-CC=$ac_save_CC
+CC=$ac_save_CC ;;
+esac
 fi
 
 if test "x$ac_cv_prog_cc_c99" = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
 printf "%s\n" "unsupported" >&6; }
-else $as_nop
-  if test "x$ac_cv_prog_cc_c99" = x
+else case e in #(
+  e) if test "x$ac_cv_prog_cc_c99" = x
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
 printf "%s\n" "none needed" >&6; }
-else $as_nop
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
+else case e in #(
+  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c99" >&5
 printf "%s\n" "$ac_cv_prog_cc_c99" >&6; }
-     CC="$CC $ac_cv_prog_cc_c99"
+     CC="$CC $ac_cv_prog_cc_c99" ;;
+esac
 fi
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c99
-  ac_prog_cc_stdc=c99
+  ac_prog_cc_stdc=c99 ;;
+esac
 fi
 fi
 if test x$ac_prog_cc_stdc = xno
@@ -3371,8 +3412,8 @@ printf %s "checking for $CC option to enable C89 features... " >&6; }
 if test ${ac_cv_prog_cc_c89+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_cv_prog_cc_c89=no
+else case e in #(
+  e) ac_cv_prog_cc_c89=no
 ac_save_CC=$CC
 cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3389,25 +3430,28 @@ rm -f core conftest.err conftest.$ac_objext conftest.beam
   test "x$ac_cv_prog_cc_c89" != "xno" && break
 done
 rm -f conftest.$ac_ext
-CC=$ac_save_CC
+CC=$ac_save_CC ;;
+esac
 fi
 
 if test "x$ac_cv_prog_cc_c89" = xno
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: unsupported" >&5
 printf "%s\n" "unsupported" >&6; }
-else $as_nop
-  if test "x$ac_cv_prog_cc_c89" = x
+else case e in #(
+  e) if test "x$ac_cv_prog_cc_c89" = x
 then :
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: none needed" >&5
 printf "%s\n" "none needed" >&6; }
-else $as_nop
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
+else case e in #(
+  e) { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_prog_cc_c89" >&5
 printf "%s\n" "$ac_cv_prog_cc_c89" >&6; }
-     CC="$CC $ac_cv_prog_cc_c89"
+     CC="$CC $ac_cv_prog_cc_c89" ;;
+esac
 fi
   ac_cv_prog_cc_stdc=$ac_cv_prog_cc_c89
-  ac_prog_cc_stdc=c89
+  ac_prog_cc_stdc=c89 ;;
+esac
 fi
 fi
 
@@ -3423,8 +3467,8 @@ printf %s "checking for inline... " >&6; }
 if test ${ac_cv_c_inline+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  ac_cv_c_inline=no
+else case e in #(
+  e) ac_cv_c_inline=no
 for ac_kw in inline __inline__ __inline; do
   cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -3442,7 +3486,8 @@ fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
   test "$ac_cv_c_inline" != no && break
 done
-
+ ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_c_inline" >&5
 printf "%s\n" "$ac_cv_c_inline" >&6; }
@@ -3500,8 +3545,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_AR+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$AR"; then
+else case e in #(
+  e) if test -n "$AR"; then
   ac_cv_prog_AR="$AR" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -3523,7 +3568,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 AR=$ac_cv_prog_AR
 if test -n "$AR"; then
@@ -3545,8 +3591,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_AR+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_AR"; then
+else case e in #(
+  e) if test -n "$ac_ct_AR"; then
   ac_cv_prog_ac_ct_AR="$ac_ct_AR" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -3568,7 +3614,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 ac_ct_AR=$ac_cv_prog_ac_ct_AR
 if test -n "$ac_ct_AR"; then
@@ -3602,8 +3649,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_RANLIB+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$RANLIB"; then
+else case e in #(
+  e) if test -n "$RANLIB"; then
   ac_cv_prog_RANLIB="$RANLIB" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -3625,7 +3672,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 RANLIB=$ac_cv_prog_RANLIB
 if test -n "$RANLIB"; then
@@ -3647,8 +3695,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_RANLIB+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_RANLIB"; then
+else case e in #(
+  e) if test -n "$ac_ct_RANLIB"; then
   ac_cv_prog_ac_ct_RANLIB="$ac_ct_RANLIB" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -3670,7 +3718,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 ac_ct_RANLIB=$ac_cv_prog_ac_ct_RANLIB
 if test -n "$ac_ct_RANLIB"; then
@@ -3704,8 +3753,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_RC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$RC"; then
+else case e in #(
+  e) if test -n "$RC"; then
   ac_cv_prog_RC="$RC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -3727,7 +3776,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 RC=$ac_cv_prog_RC
 if test -n "$RC"; then
@@ -3749,8 +3799,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_ac_ct_RC+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$ac_ct_RC"; then
+else case e in #(
+  e) if test -n "$ac_ct_RC"; then
   ac_cv_prog_ac_ct_RC="$ac_ct_RC" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -3772,7 +3822,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 ac_ct_RC=$ac_cv_prog_ac_ct_RC
 if test -n "$ac_ct_RC"; then
@@ -3810,8 +3861,8 @@ ac_make=`printf "%s\n" "$2" | sed 's/+/p/g; s/[^a-zA-Z0-9_]/_/g'`
 if eval test \${ac_cv_prog_make_${ac_make}_set+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat >conftest.make <<\_ACEOF
+else case e in #(
+  e) cat >conftest.make <<\_ACEOF
 SHELL = /bin/sh
 all:
 	@echo '@@@%%%=$(MAKE)=@@@%%%'
@@ -3823,7 +3874,8 @@ case `${MAKE-make} -f conftest.make 2>/dev/null` in
   *)
     eval ac_cv_prog_make_${ac_make}_set=no;;
 esac
-rm -f conftest.make
+rm -f conftest.make ;;
+esac
 fi
 if eval test \$ac_cv_prog_make_${ac_make}_set = yes; then
   { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: yes" >&5
@@ -3855,8 +3907,9 @@ printf %s "checking how to build libraries... " >&6; }
 if test ${enable_shared+y}
 then :
   enableval=$enable_shared; tcl_ok=$enableval
-else $as_nop
-  tcl_ok=yes
+else case e in #(
+  e) tcl_ok=yes ;;
+esac
 fi
 
     if test "$tcl_ok" = "yes" ; then
@@ -3900,8 +3953,8 @@ printf %s "checking for Tcl configuration... " >&6; }
 	if test ${ac_cv_c_tclconfig+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 
 	    # First check to see if --with-tcl was specified.
 	    if test x"${with_tclconfig}" != x ; then
@@ -3974,7 +4027,8 @@ printf "%s\n" "$as_me: WARNING: --with-tcl argument should refer to directory co
 		fi
 		done
 	    fi
-
+	 ;;
+esac
 fi
 
 
@@ -4065,8 +4119,9 @@ printf %s "checking if 64bit support is requested... " >&6; }
 if test ${enable_64bit+y}
 then :
   enableval=$enable_64bit; do64bit=$enableval
-else $as_nop
-  do64bit=no
+else case e in #(
+  e) do64bit=no ;;
+esac
 fi
 
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $do64bit" >&5
@@ -4085,8 +4140,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_CYGPATH+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$CYGPATH"; then
+else case e in #(
+  e) if test -n "$CYGPATH"; then
   ac_cv_prog_CYGPATH="$CYGPATH" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -4109,7 +4164,8 @@ done
 IFS=$as_save_IFS
 
   test -z "$ac_cv_prog_CYGPATH" && ac_cv_prog_CYGPATH="echo"
-fi
+fi ;;
+esac
 fi
 CYGPATH=$ac_cv_prog_CYGPATH
 if test -n "$CYGPATH"; then
@@ -4128,8 +4184,8 @@ printf %s "checking for $ac_word... " >&6; }
 if test ${ac_cv_prog_WINE+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -n "$WINE"; then
+else case e in #(
+  e) if test -n "$WINE"; then
   ac_cv_prog_WINE="$WINE" # Let the user override the test.
 else
 as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
@@ -4151,7 +4207,8 @@ done
   done
 IFS=$as_save_IFS
 
-fi
+fi ;;
+esac
 fi
 WINE=$ac_cv_prog_WINE
 if test -n "$WINE"; then
@@ -4177,8 +4234,8 @@ printf %s "checking for cross-compile version of gcc... " >&6; }
 if test ${ac_cv_cross+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 	    #ifndef _WIN32
@@ -4196,11 +4253,13 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_cross=no
-else $as_nop
-  ac_cv_cross=yes
+else case e in #(
+  e) ac_cv_cross=yes ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-
+       ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_cross" >&5
 printf "%s\n" "$ac_cv_cross" >&6; }
@@ -4281,8 +4340,8 @@ printf %s "checking for mingw32 version of gcc... " >&6; }
 if test ${ac_cv_win32+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 		#ifdef _WIN32
@@ -4300,11 +4359,13 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_win32=no
-else $as_nop
-  ac_cv_win32=yes
+else case e in #(
+  e) ac_cv_win32=yes ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-
+	 ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_win32" >&5
 printf "%s\n" "$ac_cv_win32" >&6; }
@@ -4321,8 +4382,8 @@ printf %s "checking for working -municode linker flag... " >&6; }
 if test ${ac_cv_municode+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 # ac_fn_c_try_link LINENO
 # -----------------------
 # Try to link conftest.$ac_ext, and return whether this succeeded.
@@ -4354,11 +4415,12 @@ printf "%s\n" "$ac_try_echo"; } >&5
        }
 then :
   ac_retval=0
-else $as_nop
-  printf "%s\n" "$as_me: failed program was:" >&5
+else case e in #(
+  e) printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-	ac_retval=1
+	ac_retval=1 ;;
+esac
 fi
   # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
   # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
@@ -4386,12 +4448,14 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   ac_cv_municode=yes
-else $as_nop
-  ac_cv_municode=no
+else case e in #(
+  e) ac_cv_municode=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
     conftest$ac_exeext conftest.$ac_ext
-
+	 ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_municode" >&5
 printf "%s\n" "$ac_cv_municode" >&6; }
@@ -4407,8 +4471,8 @@ printf %s "checking for working -fno-lto... " >&6; }
 if test ${ac_cv_nolto+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -4422,11 +4486,13 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_nolto=yes
-else $as_nop
-  ac_cv_nolto=no
+else case e in #(
+  e) ac_cv_nolto=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-
+	 ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_nolto" >&5
 printf "%s\n" "$ac_cv_nolto" >&6; }
@@ -4441,8 +4507,8 @@ printf %s "checking if the compiler understands -finput-charset... " >&6; }
 if test ${tcl_cv_cc_input_charset+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	    hold_cflags=$CFLAGS; CFLAGS="$CFLAGS -finput-charset=UTF-8"
 	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
@@ -4458,11 +4524,13 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_cc_input_charset=yes
-else $as_nop
-  tcl_cv_cc_input_charset=no
+else case e in #(
+  e) tcl_cv_cc_input_charset=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-	    CFLAGS=$hold_cflags
+	    CFLAGS=$hold_cflags ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cc_input_charset" >&5
 printf "%s\n" "$tcl_cv_cc_input_charset" >&6; }
@@ -4477,8 +4545,8 @@ printf %s "checking for working --enable-auto-image-base... " >&6; }
 if test ${ac_cv_enable_auto_image_base+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -4492,11 +4560,13 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   ac_cv_enable_auto_image_base=yes
-else $as_nop
-  ac_cv_enable_auto_image_base=no
+else case e in #(
+  e) ac_cv_enable_auto_image_base=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-
+     ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_enable_auto_image_base" >&5
 printf "%s\n" "$ac_cv_enable_auto_image_base" >&6; }
@@ -4635,9 +4705,10 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_win_64bit=yes
-else $as_nop
-  tcl_win_64bit=no
-
+else case e in #(
+  e) tcl_win_64bit=no
+		 ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 		if test "$tcl_win_64bit" = "yes" ; then
@@ -4776,12 +4847,12 @@ printf %s "checking for SEH support in compiler... " >&6; }
 if test ${tcl_cv_seh+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test "$cross_compiling" = yes
+else case e in #(
+  e) if test "$cross_compiling" = yes
 then :
   tcl_cv_seh=no
-else $as_nop
-
+else case e in #(
+  e)
 # ac_fn_c_try_run LINENO
 # ----------------------
 # Try to run conftest.$ac_ext, and return whether this succeeded. Assumes that
@@ -4812,12 +4883,13 @@ printf "%s\n" "$ac_try_echo"; } >&5
   test $ac_status = 0; }; }
 then :
   ac_retval=0
-else $as_nop
-  printf "%s\n" "$as_me: program exited with status $ac_status" >&5
+else case e in #(
+  e) printf "%s\n" "$as_me: program exited with status $ac_status" >&5
        printf "%s\n" "$as_me: failed program was:" >&5
 sed 's/^/| /' conftest.$ac_ext >&5
 
-       ac_retval=$ac_status
+       ac_retval=$ac_status ;;
+esac
 fi
   rm -rf conftest.dSYM conftest_ipa8_conftest.oo
   eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
@@ -4846,14 +4918,17 @@ _ACEOF
 if ac_fn_c_try_run "$LINENO"
 then :
   tcl_cv_seh=yes
-else $as_nop
-  tcl_cv_seh=no
+else case e in #(
+  e) tcl_cv_seh=no ;;
+esac
 fi
 rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
-  conftest.$ac_objext conftest.beam conftest.$ac_ext
+  conftest.$ac_objext conftest.beam conftest.$ac_ext ;;
+esac
 fi
 
-
+	 ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_seh" >&5
 printf "%s\n" "$tcl_cv_seh" >&6; }
@@ -4874,8 +4949,8 @@ printf %s "checking for EXCEPTION_DISPOSITION support in include files... " >&6;
 if test ${tcl_cv_eh_disposition+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 #	    define WIN32_LEAN_AND_MEAN
@@ -4895,11 +4970,13 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_eh_disposition=yes
-else $as_nop
-  tcl_cv_eh_disposition=no
+else case e in #(
+  e) tcl_cv_eh_disposition=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-
+	 ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_eh_disposition" >&5
 printf "%s\n" "$tcl_cv_eh_disposition" >&6; }
@@ -4927,8 +5004,8 @@ printf %s "checking for cast to union support... " >&6; }
 if test ${tcl_cv_cast_to_union+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+else case e in #(
+  e) cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 
 int
@@ -4945,11 +5022,13 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_cv_cast_to_union=yes
-else $as_nop
-  tcl_cv_cast_to_union=no
+else case e in #(
+  e) tcl_cv_cast_to_union=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
-
+	 ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_cast_to_union" >&5
 printf "%s\n" "$tcl_cv_cast_to_union" >&6; }
@@ -5000,8 +5079,9 @@ ac_fn_c_check_header_compile "$LINENO" "errno.h" "ac_cv_header_errno_h" "$ac_inc
 if test "x$ac_cv_header_errno_h" = xyes
 then :
 
-else $as_nop
-  MAN2TCLFLAGS="-DNO_ERRNO_H"
+else case e in #(
+  e) MAN2TCLFLAGS="-DNO_ERRNO_H" ;;
+esac
 fi
 
 
@@ -5015,8 +5095,8 @@ printf %s "checking availability of _strtoi64... " >&6; }
 if test ${tcl_cv_strtoi64+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
     cat confdefs.h - <<_ACEOF >conftest.$ac_ext
 /* end confdefs.h.  */
 #include <stdlib.h>
@@ -5031,11 +5111,13 @@ _ACEOF
 if ac_fn_c_try_link "$LINENO"
 then :
   tcl_cv_strtoi64=yes
-else $as_nop
-  tcl_cv_strtoi64=no
+else case e in #(
+  e) tcl_cv_strtoi64=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam \
-    conftest$ac_exeext conftest.$ac_ext
+    conftest$ac_exeext conftest.$ac_ext ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_strtoi64" >&5
 printf "%s\n" "$tcl_cv_strtoi64" >&6; }
@@ -5052,15 +5134,15 @@ then :
 
 printf "%s\n" "#define HAVE_INTPTR_T 1" >>confdefs.h
 
-else $as_nop
-
+else case e in #(
+  e)
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pointer-size signed integer type" >&5
 printf %s "checking for pointer-size signed integer type... " >&6; }
 if test ${tcl_cv_intptr_t+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
     for tcl_cv_intptr_t in "int" "long" "__int64" none; do
 	if test "$tcl_cv_intptr_t" != none; then
 	    cat confdefs.h - <<_ACEOF >conftest.$ac_ext
@@ -5080,12 +5162,14 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_ok=yes
-else $as_nop
-  tcl_ok=no
+else case e in #(
+  e) tcl_ok=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 	    test "$tcl_ok" = yes && break; fi
-    done
+    done ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_intptr_t" >&5
 printf "%s\n" "$tcl_cv_intptr_t" >&6; }
@@ -5094,7 +5178,8 @@ printf "%s\n" "$tcl_cv_intptr_t" >&6; }
 printf "%s\n" "#define intptr_t $tcl_cv_intptr_t" >>confdefs.h
 
     fi
-
+ ;;
+esac
 fi
 
 ac_fn_c_check_type "$LINENO" "uintptr_t" "ac_cv_type_uintptr_t" "$ac_includes_default"
@@ -5104,15 +5189,15 @@ then :
 
 printf "%s\n" "#define HAVE_UINTPTR_T 1" >>confdefs.h
 
-else $as_nop
-
+else case e in #(
+  e)
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for pointer-size unsigned integer type" >&5
 printf %s "checking for pointer-size unsigned integer type... " >&6; }
 if test ${tcl_cv_uintptr_t+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
     for tcl_cv_uintptr_t in "unsigned int" "unsigned long" "unsigned __int64" \
 	    none; do
 	if test "$tcl_cv_uintptr_t" != none; then
@@ -5133,12 +5218,14 @@ _ACEOF
 if ac_fn_c_try_compile "$LINENO"
 then :
   tcl_ok=yes
-else $as_nop
-  tcl_ok=no
+else case e in #(
+  e) tcl_ok=no ;;
+esac
 fi
 rm -f core conftest.err conftest.$ac_objext conftest.beam conftest.$ac_ext
 	    test "$tcl_ok" = yes && break; fi
-    done
+    done ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $tcl_cv_uintptr_t" >&5
 printf "%s\n" "$tcl_cv_uintptr_t" >&6; }
@@ -5147,7 +5234,8 @@ printf "%s\n" "$tcl_cv_uintptr_t" >&6; }
 printf "%s\n" "#define uintptr_t $tcl_cv_uintptr_t" >>confdefs.h
 
     fi
-
+ ;;
+esac
 fi
 
 
@@ -5164,8 +5252,9 @@ printf %s "checking for build with symbols... " >&6; }
 if test ${enable_symbols+y}
 then :
   enableval=$enable_symbols; tcl_ok=$enableval
-else $as_nop
-  tcl_ok=no
+else case e in #(
+  e) tcl_ok=no ;;
+esac
 fi
 
 # FIXME: Currently, LDFLAGS_DEFAULT is not used, it should work like CFLAGS_DEFAULT.
@@ -5236,8 +5325,8 @@ if test -z "$CPP"; then
   if test ${ac_cv_prog_CPP+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-      # Double quotes because $CC needs to be expanded
+else case e in #(
+  e)     # Double quotes because $CC needs to be expanded
     for CPP in "$CC -E" "$CC -E -traditional-cpp" cpp /lib/cpp
     do
       ac_preproc_ok=false
@@ -5255,9 +5344,10 @@ _ACEOF
 if ac_fn_c_try_cpp "$LINENO"
 then :
 
-else $as_nop
-  # Broken: fails on valid input.
-continue
+else case e in #(
+  e) # Broken: fails on valid input.
+continue ;;
+esac
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 
@@ -5271,15 +5361,16 @@ if ac_fn_c_try_cpp "$LINENO"
 then :
   # Broken: success on invalid input.
 continue
-else $as_nop
-  # Passes both tests.
+else case e in #(
+  e) # Passes both tests.
 ac_preproc_ok=:
-break
+break ;;
+esac
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 
 done
-# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+# Because of 'break', _AC_PREPROC_IFELSE's cleaning code was skipped.
 rm -f conftest.i conftest.err conftest.$ac_ext
 if $ac_preproc_ok
 then :
@@ -5288,7 +5379,8 @@ fi
 
     done
     ac_cv_prog_CPP=$CPP
-
+   ;;
+esac
 fi
   CPP=$ac_cv_prog_CPP
 else
@@ -5311,9 +5403,10 @@ _ACEOF
 if ac_fn_c_try_cpp "$LINENO"
 then :
 
-else $as_nop
-  # Broken: fails on valid input.
-continue
+else case e in #(
+  e) # Broken: fails on valid input.
+continue ;;
+esac
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 
@@ -5327,24 +5420,26 @@ if ac_fn_c_try_cpp "$LINENO"
 then :
   # Broken: success on invalid input.
 continue
-else $as_nop
-  # Passes both tests.
+else case e in #(
+  e) # Passes both tests.
 ac_preproc_ok=:
-break
+break ;;
+esac
 fi
 rm -f conftest.err conftest.i conftest.$ac_ext
 
 done
-# Because of `break', _AC_PREPROC_IFELSE's cleaning code was skipped.
+# Because of 'break', _AC_PREPROC_IFELSE's cleaning code was skipped.
 rm -f conftest.i conftest.err conftest.$ac_ext
 if $ac_preproc_ok
 then :
 
-else $as_nop
-  { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
-printf "%s\n" "$as_me: error: in \`$ac_pwd':" >&2;}
+else case e in #(
+  e) { { printf "%s\n" "$as_me:${as_lineno-$LINENO}: error: in '$ac_pwd':" >&5
+printf "%s\n" "$as_me: error: in '$ac_pwd':" >&2;}
 as_fn_error $? "C preprocessor \"$CPP\" fails sanity check
-See \`config.log' for more details" "$LINENO" 5; }
+See 'config.log' for more details" "$LINENO" 5; } ;;
+esac
 fi
 
 ac_ext=c
@@ -5354,14 +5449,14 @@ ac_link='$CC -o conftest$ac_exeext $CFLAGS $CPPFLAGS $LDFLAGS conftest.$ac_ext $
 ac_compiler_gnu=$ac_cv_c_compiler_gnu
 
 
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for grep that handles long lines and -e" >&5
-printf %s "checking for grep that handles long lines and -e... " >&6; }
-if test ${ac_cv_path_GREP+y}
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for egrep -e" >&5
+printf %s "checking for egrep -e... " >&6; }
+if test ${ac_cv_path_EGREP_TRADITIONAL+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  if test -z "$GREP"; then
-  ac_path_GREP_found=false
+else case e in #(
+  e) if test -z "$EGREP_TRADITIONAL"; then
+  ac_path_EGREP_TRADITIONAL_found=false
   # Loop through the user's path and test for each of PROGNAME-LIST
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
@@ -5375,13 +5470,14 @@ do
     for ac_prog in grep ggrep
    do
     for ac_exec_ext in '' $ac_executable_extensions; do
-      ac_path_GREP="$as_dir$ac_prog$ac_exec_ext"
-      as_fn_executable_p "$ac_path_GREP" || continue
-# Check for GNU ac_path_GREP and select it if it is found.
-  # Check for GNU $ac_path_GREP
-case `"$ac_path_GREP" --version 2>&1` in
+      ac_path_EGREP_TRADITIONAL="$as_dir$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_EGREP_TRADITIONAL" || continue
+# Check for GNU ac_path_EGREP_TRADITIONAL and select it if it is found.
+  # Check for GNU $ac_path_EGREP_TRADITIONAL
+case `"$ac_path_EGREP_TRADITIONAL" --version 2>&1` in #(
 *GNU*)
-  ac_cv_path_GREP="$ac_path_GREP" ac_path_GREP_found=:;;
+  ac_cv_path_EGREP_TRADITIONAL="$ac_path_EGREP_TRADITIONAL" ac_path_EGREP_TRADITIONAL_found=:;;
+#(
 *)
   ac_count=0
   printf %s 0123456789 >"conftest.in"
@@ -5390,14 +5486,14 @@ case `"$ac_path_GREP" --version 2>&1` in
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
-    printf "%s\n" 'GREP' >> "conftest.nl"
-    "$ac_path_GREP" -e 'GREP$' -e '-(cannot match)-' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    printf "%s\n" 'EGREP_TRADITIONAL' >> "conftest.nl"
+    "$ac_path_EGREP_TRADITIONAL" -E 'EGR(EP|AC)_TRADITIONAL$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
-    if test $ac_count -gt ${ac_path_GREP_max-0}; then
+    if test $ac_count -gt ${ac_path_EGREP_TRADITIONAL_max-0}; then
       # Best one so far, save it but keep looking for a better one
-      ac_cv_path_GREP="$ac_path_GREP"
-      ac_path_GREP_max=$ac_count
+      ac_cv_path_EGREP_TRADITIONAL="$ac_path_EGREP_TRADITIONAL"
+      ac_path_EGREP_TRADITIONAL_max=$ac_count
     fi
     # 10*(2^10) chars as input seems more than enough
     test $ac_count -gt 10 && break
@@ -5405,35 +5501,24 @@ case `"$ac_path_GREP" --version 2>&1` in
   rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
 esac
 
-      $ac_path_GREP_found && break 3
+      $ac_path_EGREP_TRADITIONAL_found && break 3
     done
   done
   done
 IFS=$as_save_IFS
-  if test -z "$ac_cv_path_GREP"; then
-    as_fn_error $? "no acceptable grep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
+  if test -z "$ac_cv_path_EGREP_TRADITIONAL"; then
+    :
   fi
 else
-  ac_cv_path_GREP=$GREP
-fi
-
+  ac_cv_path_EGREP_TRADITIONAL=$EGREP_TRADITIONAL
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_GREP" >&5
-printf "%s\n" "$ac_cv_path_GREP" >&6; }
- GREP="$ac_cv_path_GREP"
 
-
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking for egrep" >&5
-printf %s "checking for egrep... " >&6; }
-if test ${ac_cv_path_EGREP+y}
+    if test "$ac_cv_path_EGREP_TRADITIONAL"
 then :
-  printf %s "(cached) " >&6
-else $as_nop
-  if echo a | $GREP -E '(a|b)' >/dev/null 2>&1
-   then ac_cv_path_EGREP="$GREP -E"
-   else
-     if test -z "$EGREP"; then
-  ac_path_EGREP_found=false
+  ac_cv_path_EGREP_TRADITIONAL="$ac_cv_path_EGREP_TRADITIONAL -E"
+else case e in #(
+  e) if test -z "$EGREP_TRADITIONAL"; then
+  ac_path_EGREP_TRADITIONAL_found=false
   # Loop through the user's path and test for each of PROGNAME-LIST
   as_save_IFS=$IFS; IFS=$PATH_SEPARATOR
 for as_dir in $PATH$PATH_SEPARATOR/usr/xpg4/bin
@@ -5447,13 +5532,14 @@ do
     for ac_prog in egrep
    do
     for ac_exec_ext in '' $ac_executable_extensions; do
-      ac_path_EGREP="$as_dir$ac_prog$ac_exec_ext"
-      as_fn_executable_p "$ac_path_EGREP" || continue
-# Check for GNU ac_path_EGREP and select it if it is found.
-  # Check for GNU $ac_path_EGREP
-case `"$ac_path_EGREP" --version 2>&1` in
+      ac_path_EGREP_TRADITIONAL="$as_dir$ac_prog$ac_exec_ext"
+      as_fn_executable_p "$ac_path_EGREP_TRADITIONAL" || continue
+# Check for GNU ac_path_EGREP_TRADITIONAL and select it if it is found.
+  # Check for GNU $ac_path_EGREP_TRADITIONAL
+case `"$ac_path_EGREP_TRADITIONAL" --version 2>&1` in #(
 *GNU*)
-  ac_cv_path_EGREP="$ac_path_EGREP" ac_path_EGREP_found=:;;
+  ac_cv_path_EGREP_TRADITIONAL="$ac_path_EGREP_TRADITIONAL" ac_path_EGREP_TRADITIONAL_found=:;;
+#(
 *)
   ac_count=0
   printf %s 0123456789 >"conftest.in"
@@ -5462,14 +5548,14 @@ case `"$ac_path_EGREP" --version 2>&1` in
     cat "conftest.in" "conftest.in" >"conftest.tmp"
     mv "conftest.tmp" "conftest.in"
     cp "conftest.in" "conftest.nl"
-    printf "%s\n" 'EGREP' >> "conftest.nl"
-    "$ac_path_EGREP" 'EGREP$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
+    printf "%s\n" 'EGREP_TRADITIONAL' >> "conftest.nl"
+    "$ac_path_EGREP_TRADITIONAL" 'EGR(EP|AC)_TRADITIONAL$' < "conftest.nl" >"conftest.out" 2>/dev/null || break
     diff "conftest.out" "conftest.nl" >/dev/null 2>&1 || break
     as_fn_arith $ac_count + 1 && ac_count=$as_val
-    if test $ac_count -gt ${ac_path_EGREP_max-0}; then
+    if test $ac_count -gt ${ac_path_EGREP_TRADITIONAL_max-0}; then
       # Best one so far, save it but keep looking for a better one
-      ac_cv_path_EGREP="$ac_path_EGREP"
-      ac_path_EGREP_max=$ac_count
+      ac_cv_path_EGREP_TRADITIONAL="$ac_path_EGREP_TRADITIONAL"
+      ac_path_EGREP_TRADITIONAL_max=$ac_count
     fi
     # 10*(2^10) chars as input seems more than enough
     test $ac_count -gt 10 && break
@@ -5477,24 +5563,25 @@ case `"$ac_path_EGREP" --version 2>&1` in
   rm -f conftest.in conftest.tmp conftest.nl conftest.out;;
 esac
 
-      $ac_path_EGREP_found && break 3
+      $ac_path_EGREP_TRADITIONAL_found && break 3
     done
   done
   done
 IFS=$as_save_IFS
-  if test -z "$ac_cv_path_EGREP"; then
+  if test -z "$ac_cv_path_EGREP_TRADITIONAL"; then
     as_fn_error $? "no acceptable egrep could be found in $PATH$PATH_SEPARATOR/usr/xpg4/bin" "$LINENO" 5
   fi
 else
-  ac_cv_path_EGREP=$EGREP
+  ac_cv_path_EGREP_TRADITIONAL=$EGREP_TRADITIONAL
 fi
-
-   fi
+ ;;
+esac
+fi ;;
+esac
 fi
-{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP" >&5
-printf "%s\n" "$ac_cv_path_EGREP" >&6; }
- EGREP="$ac_cv_path_EGREP"
-
+{ printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $ac_cv_path_EGREP_TRADITIONAL" >&5
+printf "%s\n" "$ac_cv_path_EGREP_TRADITIONAL" >&6; }
+ EGREP_TRADITIONAL=$ac_cv_path_EGREP_TRADITIONAL
 
 
     { printf "%s\n" "$as_me:${as_lineno-$LINENO}: checking whether to embed manifest" >&5
@@ -5503,8 +5590,9 @@ printf %s "checking whether to embed manifest... " >&6; }
 if test ${enable_embedded_manifest+y}
 then :
   enableval=$enable_embedded_manifest; embed_ok=$enableval
-else $as_nop
-  embed_ok=yes
+else case e in #(
+  e) embed_ok=yes ;;
+esac
 fi
 
 
@@ -5523,7 +5611,7 @@ print("manifest needed")
 
 _ACEOF
 if (eval "$ac_cpp conftest.$ac_ext") 2>&5 |
-  $EGREP "manifest needed" >/dev/null 2>&1
+  $EGREP_TRADITIONAL "manifest needed" >/dev/null 2>&1
 then :
 
 	# Could do a CHECK_PROG for mt, but should always be with MSVC8+
@@ -5564,8 +5652,8 @@ printf %s "checking for tclsh... " >&6; }
     if test ${ac_cv_path_tclsh+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	search_path=`echo ${PATH} | sed -e 's/:/ /g'`
 	for dir in $search_path ; do
 	    for j in `ls -r $dir/tclsh[8-9]*.exe 2> /dev/null` \
@@ -5578,7 +5666,8 @@ else $as_nop
 		fi
 	    done
 	done
-
+     ;;
+esac
 fi
 
 
@@ -5602,8 +5691,9 @@ printf "%s\n" "No tclsh found on PATH" >&6; }
 if test ${enable_zipfs+y}
 then :
   enableval=$enable_zipfs; tcl_ok=$enableval
-else $as_nop
-  tcl_ok=yes
+else case e in #(
+  e) tcl_ok=yes ;;
+esac
 fi
 
 if test "$tcl_ok" = "yes" ; then
@@ -5620,8 +5710,8 @@ printf %s "checking for gcc... " >&6; }
     if test ${ac_cv_path_cc+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
 	search_path=`echo ${PATH} | sed -e 's/:/ /g'`
 	for dir in $search_path ; do
 	    for j in `ls -r $dir/gcc 2> /dev/null` \
@@ -5634,7 +5724,8 @@ else $as_nop
 		fi
 	    done
 	done
-
+     ;;
+esac
 fi
 
   fi
@@ -5651,8 +5742,8 @@ printf %s "checking for build system executable suffix... " >&6; }
 if test ${bfd_cv_build_exeext+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-  rm -f conftest*
+else case e in #(
+  e) rm -f conftest*
      echo 'int main () { return 0; }' > conftest.c
      bfd_cv_build_exeext=
      ${CC_FOR_BUILD} -o conftest conftest.c 1>&5 2>&5
@@ -5663,7 +5754,8 @@ else $as_nop
        esac
      done
      rm -f conftest*
-     test x"${bfd_cv_build_exeext}" = x && bfd_cv_build_exeext=no
+     test x"${bfd_cv_build_exeext}" = x && bfd_cv_build_exeext=no ;;
+esac
 fi
 { printf "%s\n" "$as_me:${as_lineno-$LINENO}: result: $bfd_cv_build_exeext" >&5
 printf "%s\n" "$bfd_cv_build_exeext" >&6; }
@@ -5685,8 +5777,8 @@ printf %s "checking for zip... " >&6; }
     if test ${ac_cv_path_zip+y}
 then :
   printf %s "(cached) " >&6
-else $as_nop
-
+else case e in #(
+  e)
     search_path=`echo ${PATH} | sed -e 's/:/ /g'`
     for dir in $search_path ; do
         for j in `ls -r $dir/zip 2> /dev/null` \
@@ -5699,7 +5791,8 @@ else $as_nop
         fi
         done
     done
-
+     ;;
+esac
 fi
 
     if test -f "$ac_cv_path_zip" ; then
@@ -5950,8 +6043,8 @@ cat >confcache <<\_ACEOF
 # config.status only pays attention to the cache file if you give it
 # the --recheck option to rerun configure.
 #
-# `ac_cv_env_foo' variables (set or unset) will be overridden when
-# loading this file, other *unset* `ac_cv_foo' will be assigned the
+# 'ac_cv_env_foo' variables (set or unset) will be overridden when
+# loading this file, other *unset* 'ac_cv_foo' will be assigned the
 # following values.
 
 _ACEOF
@@ -5981,14 +6074,14 @@ printf "%s\n" "$as_me: WARNING: cache variable $ac_var contains a newline" >&2;}
   (set) 2>&1 |
     case $as_nl`(ac_space=' '; set) 2>&1` in #(
     *${as_nl}ac_space=\ *)
-      # `set' does not quote correctly, so add quotes: double-quote
+      # 'set' does not quote correctly, so add quotes: double-quote
       # substitution turns \\\\ into \\, and sed turns \\ into \.
       sed -n \
 	"s/'/'\\\\''/g;
 	  s/^\\([_$as_cr_alnum]*_cv_[_$as_cr_alnum]*\\)=\\(.*\\)/\\1='\\2'/p"
       ;; #(
     *)
-      # `set' quotes correctly as required by POSIX, so do not add quotes.
+      # 'set' quotes correctly as required by POSIX, so do not add quotes.
       sed -n "/^[_$as_cr_alnum]*_cv_[_$as_cr_alnum]*=/p"
       ;;
     esac |
@@ -6052,9 +6145,7 @@ s/^[	 ]*#[	 ]*define[	 ][	 ]*\([^	 ][^	 ]*\)[	 ]*\(.*\)/-D\1=\2/g
 t quote
 b any
 :quote
-s/[	 `~#$^&*(){}\\|;'\''"<>?]/\\&/g
-s/\[/\\&/g
-s/\]/\\&/g
+s/[][	 `~#$^&*(){}\\|;'\''"<>?]/\\&/g
 s/\$/$$/g
 H
 :any
@@ -6114,7 +6205,6 @@ cat >>$CONFIG_STATUS <<\_ASEOF || as_write_fail=1
 
 # Be more Bourne compatible
 DUALCASE=1; export DUALCASE # for MKS sh
-as_nop=:
 if test ${ZSH_VERSION+y} && (emulate sh) >/dev/null 2>&1
 then :
   emulate sh
@@ -6123,12 +6213,13 @@ then :
   # is contrary to our usage.  Disable this feature.
   alias -g '${1+"$@"}'='"$@"'
   setopt NO_GLOB_SUBST
-else $as_nop
-  case `(set -o) 2>/dev/null` in #(
+else case e in #(
+  e) case `(set -o) 2>/dev/null` in #(
   *posix*) :
     set -o posix ;; #(
   *) :
      ;;
+esac ;;
 esac
 fi
 
@@ -6200,7 +6291,7 @@ IFS=$as_save_IFS
 
      ;;
 esac
-# We did not find ourselves, most probably we were run as `sh COMMAND'
+# We did not find ourselves, most probably we were run as 'sh COMMAND'
 # in which case we are not to be found in the path.
 if test "x$as_myself" = x; then
   as_myself=$0
@@ -6229,7 +6320,6 @@ as_fn_error ()
 } # as_fn_error
 
 
-
 # as_fn_set_status STATUS
 # -----------------------
 # Set $? to STATUS, without forking.
@@ -6269,11 +6359,12 @@ then :
   {
     eval $1+=\$2
   }'
-else $as_nop
-  as_fn_append ()
+else case e in #(
+  e) as_fn_append ()
   {
     eval $1=\$$1\$2
-  }
+  } ;;
+esac
 fi # as_fn_append
 
 # as_fn_arith ARG...
@@ -6287,11 +6378,12 @@ then :
   {
     as_val=$(( $* ))
   }'
-else $as_nop
-  as_fn_arith ()
+else case e in #(
+  e) as_fn_arith ()
   {
     as_val=`expr "$@" || test $? -eq 1`
-  }
+  } ;;
+esac
 fi # as_fn_arith
 
 
@@ -6374,9 +6466,9 @@ if (echo >conf$$.file) 2>/dev/null; then
   if ln -s conf$$.file conf$$ 2>/dev/null; then
     as_ln_s='ln -s'
     # ... but there are two gotchas:
-    # 1) On MSYS, both `ln -s file dir' and `ln file dir' fail.
-    # 2) DJGPP < 2.04 has no symlinks; `ln -s' creates a wrapper executable.
-    # In both cases, we have to default to `cp -pR'.
+    # 1) On MSYS, both 'ln -s file dir' and 'ln file dir' fail.
+    # 2) DJGPP < 2.04 has no symlinks; 'ln -s' creates a wrapper executable.
+    # In both cases, we have to default to 'cp -pR'.
     ln -s conf$$.file conf$$.dir 2>/dev/null && test ! -f conf$$.exe ||
       as_ln_s='cp -pR'
   elif ln conf$$.file conf$$ 2>/dev/null; then
@@ -6457,10 +6549,12 @@ as_test_x='test -x'
 as_executable_p=as_fn_executable_p
 
 # Sed expression to map a string onto a valid CPP name.
-as_tr_cpp="eval sed 'y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g'"
+as_sed_cpp="y%*$as_cr_letters%P$as_cr_LETTERS%;s%[^_$as_cr_alnum]%_%g"
+as_tr_cpp="eval sed '$as_sed_cpp'" # deprecated
 
 # Sed expression to map a string onto a valid variable name.
-as_tr_sh="eval sed 'y%*+%pp%;s%[^_$as_cr_alnum]%_%g'"
+as_sed_sh="y%*+%pp%;s%[^_$as_cr_alnum]%_%g"
+as_tr_sh="eval sed '$as_sed_sh'" # deprecated
 
 
 exec 6>&1
@@ -6476,7 +6570,7 @@ cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 # values after options handling.
 ac_log="
 This file was extended by tk $as_me 8.7, which was
-generated by GNU Autoconf 2.71.  Invocation command line was
+generated by GNU Autoconf 2.72.  Invocation command line was
 
   CONFIG_FILES    = $CONFIG_FILES
   CONFIG_HEADERS  = $CONFIG_HEADERS
@@ -6503,7 +6597,7 @@ _ACEOF
 
 cat >>$CONFIG_STATUS <<\_ACEOF || ac_write_fail=1
 ac_cs_usage="\
-\`$as_me' instantiates files and other configuration actions
+'$as_me' instantiates files and other configuration actions
 from templates according to the current configuration.  Unless the files
 and actions are specified as TAGs, all are instantiated by default.
 
@@ -6531,10 +6625,10 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 ac_cs_config='$ac_cs_config_escaped'
 ac_cs_version="\\
 tk config.status 8.7
-configured by $0, generated by GNU Autoconf 2.71,
+configured by $0, generated by GNU Autoconf 2.72,
   with options \\"\$ac_cs_config\\"
 
-Copyright (C) 2021 Free Software Foundation, Inc.
+Copyright (C) 2023 Free Software Foundation, Inc.
 This config.status script is free software; the Free Software Foundation
 gives unlimited permission to copy, distribute and modify it."
 
@@ -6591,8 +6685,8 @@ do
     ac_cs_silent=: ;;
 
   # This is an error.
-  -*) as_fn_error $? "unrecognized option: \`$1'
-Try \`$0 --help' for more information." ;;
+  -*) as_fn_error $? "unrecognized option: '$1'
+Try '$0 --help' for more information." ;;
 
   *) as_fn_append ac_config_targets " $1"
      ac_need_defaults=false ;;
@@ -6644,7 +6738,7 @@ do
     "tkConfig.sh") CONFIG_FILES="$CONFIG_FILES tkConfig.sh" ;;
     "wish.exe.manifest") CONFIG_FILES="$CONFIG_FILES wish.exe.manifest" ;;
 
-  *) as_fn_error $? "invalid argument: \`$ac_config_target'" "$LINENO" 5;;
+  *) as_fn_error $? "invalid argument: '$ac_config_target'" "$LINENO" 5;;
   esac
 done
 
@@ -6662,7 +6756,7 @@ fi
 # creating and moving files from /tmp can sometimes cause problems.
 # Hook for its removal unless debugging.
 # Note that there is a small window in which the directory will not be cleaned:
-# after its creation but before its name has been assigned to `$tmp'.
+# after its creation but before its name has been assigned to '$tmp'.
 $debug ||
 {
   tmp= ac_tmp=
@@ -6686,7 +6780,7 @@ ac_tmp=$tmp
 
 # Set up the scripts for CONFIG_FILES section.
 # No need to generate them if there are no CONFIG_FILES.
-# This happens for instance with `./config.status config.h'.
+# This happens for instance with './config.status config.h'.
 if test -n "$CONFIG_FILES"; then
 
 
@@ -6852,7 +6946,7 @@ do
   esac
   case $ac_mode$ac_tag in
   :[FHL]*:*);;
-  :L* | :C*:*) as_fn_error $? "invalid tag \`$ac_tag'" "$LINENO" 5;;
+  :L* | :C*:*) as_fn_error $? "invalid tag '$ac_tag'" "$LINENO" 5;;
   :[FH]-) ac_tag=-:-;;
   :[FH]*) ac_tag=$ac_tag:$ac_tag.in;;
   esac
@@ -6874,19 +6968,19 @@ do
       -) ac_f="$ac_tmp/stdin";;
       *) # Look for the file first in the build tree, then in the source tree
 	 # (if the path is not absolute).  The absolute path cannot be DOS-style,
-	 # because $ac_f cannot contain `:'.
+	 # because $ac_f cannot contain ':'.
 	 test -f "$ac_f" ||
 	   case $ac_f in
 	   [\\/$]*) false;;
 	   *) test -f "$srcdir/$ac_f" && ac_f="$srcdir/$ac_f";;
 	   esac ||
-	   as_fn_error 1 "cannot find input file: \`$ac_f'" "$LINENO" 5;;
+	   as_fn_error 1 "cannot find input file: '$ac_f'" "$LINENO" 5;;
       esac
       case $ac_f in *\'*) ac_f=`printf "%s\n" "$ac_f" | sed "s/'/'\\\\\\\\''/g"`;; esac
       as_fn_append ac_file_inputs " '$ac_f'"
     done
 
-    # Let's still pretend it is `configure' which instantiates (i.e., don't
+    # Let's still pretend it is 'configure' which instantiates (i.e., don't
     # use $as_me), people would be surprised to read:
     #    /* config.h.  Generated by config.status.  */
     configure_input='Generated from '`
@@ -7010,7 +7104,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
 esac
 _ACEOF
 
-# Neutralize VPATH when `$srcdir' = `.'.
+# Neutralize VPATH when '$srcdir' = '.'.
 # Shell code in configure.ac might set extrasub.
 # FIXME: do we really want to maintain this feature?
 cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
@@ -7039,9 +7133,9 @@ test -z "$ac_datarootdir_hack$ac_datarootdir_seen" &&
   { ac_out=`sed -n '/\${datarootdir}/p' "$ac_tmp/out"`; test -n "$ac_out"; } &&
   { ac_out=`sed -n '/^[	 ]*datarootdir[	 ]*:*=/p' \
       "$ac_tmp/out"`; test -z "$ac_out"; } &&
-  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+  { printf "%s\n" "$as_me:${as_lineno-$LINENO}: WARNING: $ac_file contains a reference to the variable 'datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&5
-printf "%s\n" "$as_me: WARNING: $ac_file contains a reference to the variable \`datarootdir'
+printf "%s\n" "$as_me: WARNING: $ac_file contains a reference to the variable 'datarootdir'
 which seems to be undefined.  Please make sure it is defined" >&2;}
 
   rm -f "$ac_tmp/stdin"