Purge configuration efforts at supporting platforms lacking <limits.h>.

6 files changed, 7 insertions, 182 deletions

diff --git a/unix/Makefile.in b/unix/Makefile.in
index f21fdbb..0736055 100644
--- a/unix/Makefile.in
+++ b/unix/Makefile.in
@@ -1608,7 +1608,7 @@ dist:   $(UNIX_DIR)/configure $(UNIX_DIR)/tkConfig.h.in $(UNIX_DIR)/tk.pc.in $(M
 		$(DISTDIR)/macosx/Tk.xcodeproj
 	mkdir $(DISTDIR)/compat
 	cp -p $(TOP_DIR)/license.terms $(TCLDIR)/compat/unistd.h \
-		$(TCLDIR)/compat/stdlib.h $(TCLDIR)/compat/limits.h \
+		$(TCLDIR)/compat/stdlib.h \
 		$(DISTDIR)/compat
 	mkdir $(DISTDIR)/xlib
 	cp -p $(XLIB_DIR)/*.[ch] $(DISTDIR)/xlib
diff --git a/unix/configure b/unix/configure
index 21a053e..c10a247 100755
--- a/unix/configure
+++ b/unix/configure
@@ -2692,8 +2692,11 @@ _ACEOF
 esac
 
 
-# limits header checks must come early to prevent
-# an autoconf bug that throws errors on configure
+#--------------------------------------------------------------------
+# Supply a substitute for stdlib.h if it doesn't define strtol,
+# strtoul, or strtod (which it doesn't in some versions of SunOS).
+#--------------------------------------------------------------------
+
 ac_ext=c
 ac_cpp='$CPP $CPPFLAGS'
 ac_compile='$CC -c $CFLAGS $CPPFLAGS conftest.$ac_ext >&5'
@@ -3182,164 +3185,6 @@ fi
 done
 
 
-if test "${ac_cv_header_limits_h+set}" = set; then
-  echo "$as_me:$LINENO: checking for limits.h" >&5
-echo $ECHO_N "checking for limits.h... $ECHO_C" >&6
-if test "${ac_cv_header_limits_h+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-fi
-echo "$as_me:$LINENO: result: $ac_cv_header_limits_h" >&5
-echo "${ECHO_T}$ac_cv_header_limits_h" >&6
-else
-  # Is the header compilable?
-echo "$as_me:$LINENO: checking limits.h usability" >&5
-echo $ECHO_N "checking limits.h usability... $ECHO_C" >&6
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-$ac_includes_default
-#include <limits.h>
-_ACEOF
-rm -f conftest.$ac_objext
-if { (eval echo "$as_me:$LINENO: \"$ac_compile\"") >&5
-  (eval $ac_compile) 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } &&
-	 { ac_try='test -z "$ac_c_werror_flag"
-			 || test ! -s conftest.err'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; } &&
-	 { ac_try='test -s conftest.$ac_objext'
-  { (eval echo "$as_me:$LINENO: \"$ac_try\"") >&5
-  (eval $ac_try) 2>&5
-  ac_status=$?
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); }; }; then
-  ac_header_compiler=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-ac_header_compiler=no
-fi
-rm -f conftest.err conftest.$ac_objext conftest.$ac_ext
-echo "$as_me:$LINENO: result: $ac_header_compiler" >&5
-echo "${ECHO_T}$ac_header_compiler" >&6
-
-# Is the header present?
-echo "$as_me:$LINENO: checking limits.h presence" >&5
-echo $ECHO_N "checking limits.h presence... $ECHO_C" >&6
-cat >conftest.$ac_ext <<_ACEOF
-/* confdefs.h.  */
-_ACEOF
-cat confdefs.h >>conftest.$ac_ext
-cat >>conftest.$ac_ext <<_ACEOF
-/* end confdefs.h.  */
-#include <limits.h>
-_ACEOF
-if { (eval echo "$as_me:$LINENO: \"$ac_cpp conftest.$ac_ext\"") >&5
-  (eval $ac_cpp conftest.$ac_ext) 2>conftest.er1
-  ac_status=$?
-  grep -v '^ *+' conftest.er1 >conftest.err
-  rm -f conftest.er1
-  cat conftest.err >&5
-  echo "$as_me:$LINENO: \$? = $ac_status" >&5
-  (exit $ac_status); } >/dev/null; then
-  if test -s conftest.err; then
-    ac_cpp_err=$ac_c_preproc_warn_flag
-    ac_cpp_err=$ac_cpp_err$ac_c_werror_flag
-  else
-    ac_cpp_err=
-  fi
-else
-  ac_cpp_err=yes
-fi
-if test -z "$ac_cpp_err"; then
-  ac_header_preproc=yes
-else
-  echo "$as_me: failed program was:" >&5
-sed 's/^/| /' conftest.$ac_ext >&5
-
-  ac_header_preproc=no
-fi
-rm -f conftest.err conftest.$ac_ext
-echo "$as_me:$LINENO: result: $ac_header_preproc" >&5
-echo "${ECHO_T}$ac_header_preproc" >&6
-
-# So?  What about this header?
-case $ac_header_compiler:$ac_header_preproc:$ac_c_preproc_warn_flag in
-  yes:no: )
-    { echo "$as_me:$LINENO: WARNING: limits.h: accepted by the compiler, rejected by the preprocessor!" >&5
-echo "$as_me: WARNING: limits.h: accepted by the compiler, rejected by the preprocessor!" >&2;}
-    { echo "$as_me:$LINENO: WARNING: limits.h: proceeding with the compiler's result" >&5
-echo "$as_me: WARNING: limits.h: proceeding with the compiler's result" >&2;}
-    ac_header_preproc=yes
-    ;;
-  no:yes:* )
-    { echo "$as_me:$LINENO: WARNING: limits.h: present but cannot be compiled" >&5
-echo "$as_me: WARNING: limits.h: present but cannot be compiled" >&2;}
-    { echo "$as_me:$LINENO: WARNING: limits.h:     check for missing prerequisite headers?" >&5
-echo "$as_me: WARNING: limits.h:     check for missing prerequisite headers?" >&2;}
-    { echo "$as_me:$LINENO: WARNING: limits.h: see the Autoconf documentation" >&5
-echo "$as_me: WARNING: limits.h: see the Autoconf documentation" >&2;}
-    { echo "$as_me:$LINENO: WARNING: limits.h:     section \"Present But Cannot Be Compiled\"" >&5
-echo "$as_me: WARNING: limits.h:     section \"Present But Cannot Be Compiled\"" >&2;}
-    { echo "$as_me:$LINENO: WARNING: limits.h: proceeding with the preprocessor's result" >&5
-echo "$as_me: WARNING: limits.h: proceeding with the preprocessor's result" >&2;}
-    { echo "$as_me:$LINENO: WARNING: limits.h: in the future, the compiler will take precedence" >&5
-echo "$as_me: WARNING: limits.h: in the future, the compiler will take precedence" >&2;}
-    (
-      cat <<\_ASBOX
-## ----------------------------- ##
-## Report this to the tk lists.  ##
-## ----------------------------- ##
-_ASBOX
-    ) |
-      sed "s/^/$as_me: WARNING:     /" >&2
-    ;;
-esac
-echo "$as_me:$LINENO: checking for limits.h" >&5
-echo $ECHO_N "checking for limits.h... $ECHO_C" >&6
-if test "${ac_cv_header_limits_h+set}" = set; then
-  echo $ECHO_N "(cached) $ECHO_C" >&6
-else
-  ac_cv_header_limits_h=$ac_header_preproc
-fi
-echo "$as_me:$LINENO: result: $ac_cv_header_limits_h" >&5
-echo "${ECHO_T}$ac_cv_header_limits_h" >&6
-
-fi
-if test $ac_cv_header_limits_h = yes; then
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_LIMITS_H 1
-_ACEOF
-
-else
-
-cat >>confdefs.h <<\_ACEOF
-#define NO_LIMITS_H 1
-_ACEOF
-
-fi
-
-
-
-#--------------------------------------------------------------------
-# Supply a substitute for stdlib.h if it doesn't define strtol,
-# strtoul, or strtod (which it doesn't in some versions of SunOS).
-#--------------------------------------------------------------------
-
 if test "${ac_cv_header_stdlib_h+set}" = set; then
   echo "$as_me:$LINENO: checking for stdlib.h" >&5
 echo $ECHO_N "checking for stdlib.h... $ECHO_C" >&6
diff --git a/unix/configure.in b/unix/configure.in
index 26aadfd..5a18d46 100644
--- a/unix/configure.in
+++ b/unix/configure.in
@@ -81,12 +81,6 @@ fi
 AC_PROG_CC
 AC_C_INLINE
 
-# limits header checks must come early to prevent
-# an autoconf bug that throws errors on configure
-AC_CHECK_HEADER(limits.h,
-    [AC_DEFINE(HAVE_LIMITS_H, 1, [Do we have <limits.h>?])],
-    [AC_DEFINE(NO_LIMITS_H, 1, [Do we have <limits.h>?])])
-
 #--------------------------------------------------------------------
 # Supply a substitute for stdlib.h if it doesn't define strtol,
 # strtoul, or strtod (which it doesn't in some versions of SunOS).
diff --git a/unix/tcl.m4 b/unix/tcl.m4
index 30b3bc1..1a56932 100644
--- a/unix/tcl.m4
+++ b/unix/tcl.m4
@@ -2158,7 +2158,6 @@ dnl # preprocessing tests use only CPPFLAGS.
 #	Defines some of the following vars:
 #		NO_DIRENT_H
 #		NO_VALUES_H
-#		HAVE_LIMITS_H or NO_LIMITS_H
 #		NO_STDLIB_H
 #		NO_STRING_H
 #		NO_SYS_WAIT_H
@@ -2198,9 +2197,6 @@ closedir(d);
 
     AC_CHECK_HEADER(float.h, , [AC_DEFINE(NO_FLOAT_H, 1, [Do we have <float.h>?])])
     AC_CHECK_HEADER(values.h, , [AC_DEFINE(NO_VALUES_H, 1, [Do we have <values.h>?])])
-    AC_CHECK_HEADER(limits.h,
-	[AC_DEFINE(HAVE_LIMITS_H, 1, [Do we have <limits.h>?])],
-	[AC_DEFINE(NO_LIMITS_H, 1, [Do we have <limits.h>?])])
     AC_CHECK_HEADER(stdlib.h, tcl_ok=1, tcl_ok=0)
     AC_EGREP_HEADER(strtol, stdlib.h, , tcl_ok=0)
     AC_EGREP_HEADER(strtoul, stdlib.h, , tcl_ok=0)
diff --git a/unix/tkConfig.h.in b/unix/tkConfig.h.in
index 1e5593c..4fd7726 100644
--- a/unix/tkConfig.h.in
+++ b/unix/tkConfig.h.in
@@ -25,9 +25,6 @@
 /* Define to 1 if you have the `Xft' library (-lXft). */
 #undef HAVE_LIBXFT
 
-/* Do we have <limits.h>? */
-#undef HAVE_LIMITS_H
-
 /* Define to 1 if you have the `lseek64' function. */
 #undef HAVE_LSEEK64
 
@@ -115,9 +112,6 @@
 /* Do we have fd_set? */
 #undef NO_FD_SET
 
-/* Do we have <limits.h>? */
-#undef NO_LIMITS_H
-
 /* Do we have <stdlib.h>? */
 #undef NO_STDLIB_H
 
diff --git a/unix/tkUnixPort.h b/unix/tkUnixPort.h
index 9051c63..dbd5e09 100644
--- a/unix/tkUnixPort.h
+++ b/unix/tkUnixPort.h
@@ -20,11 +20,7 @@
 #include <stdio.h>
 #include <ctype.h>
 #include <fcntl.h>
-#ifndef NO_LIMITS_H
-#   include <limits.h>
-#else
-#   include "../compat/limits.h"
-#endif
+#include <limits.h>
 #include <math.h>
 #include <pwd.h>
 #ifdef NO_STDLIB_H