Tcl source code already assumes the <limits.h> file is available.

(See tcl/libtommath/tommath.h .)  So dispose of all the configuration
shenanigans pretending we want to support systems that lack one.

6 files changed, 7 insertions, 199 deletions

diff --git a/compat/limits.h b/compat/limits.h
deleted file mode 100644
index 2cb082b..0000000
--- a/compat/limits.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * limits.h --
- *
- *	This is a dummy header file to #include in Tcl when there
- *	is no limits.h in /usr/include.  There are only a few
- *	definitions here;  also see tclPort.h, which already
- *	#defines some of the things here if they're not arleady
- *	defined.
- *
- * Copyright (c) 1991 The Regents of the University of California.
- * Copyright (c) 1994 Sun Microsystems, Inc.
- *
- * See the file "license.terms" for information on usage and redistribution
- * of this file, and for a DISCLAIMER OF ALL WARRANTIES.
- */
-
-#define LONG_MIN		0x80000000
-#define LONG_MAX		0x7fffffff
-#define INT_MIN			0x80000000
-#define INT_MAX			0x7fffffff
-#define SHRT_MIN		0x8000
-#define SHRT_MAX		0x7fff
diff --git a/generic/tcl.h b/generic/tcl.h
index f09315b..5eff4d6 100644
--- a/generic/tcl.h
+++ b/generic/tcl.h
@@ -392,16 +392,12 @@ typedef long LONG;
  * Don't know what platform it is and configure hasn't discovered what is
  * going on for us. Try to guess...
  */
-#      ifdef NO_LIMITS_H
-#	  error please define either TCL_WIDE_INT_TYPE or TCL_WIDE_INT_IS_LONG
-#      else /* !NO_LIMITS_H */
-#	  include <limits.h>
-#	  if (INT_MAX < LONG_MAX)
-#	     define TCL_WIDE_INT_IS_LONG	1
-#	  else
-#	     define TCL_WIDE_INT_TYPE long long
-#         endif
-#      endif /* NO_LIMITS_H */
+#      include <limits.h>
+#      if (INT_MAX < LONG_MAX)
+#         define TCL_WIDE_INT_IS_LONG	1
+#      else
+#         define TCL_WIDE_INT_TYPE long long
+#      endif
 #   endif /* _WIN32 */
 #endif /* !TCL_WIDE_INT_TYPE & !TCL_WIDE_INT_IS_LONG */
 #ifdef TCL_WIDE_INT_IS_LONG
diff --git a/unix/configure b/unix/configure
index 6f5311c..cb46f8d 100755
--- a/unix/configure
+++ b/unix/configure
@@ -3332,158 +3332,6 @@ _ACEOF
 fi
 
 
-    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 "$as_me: WARNING: limits.h: in the future, the compiler will take precedence" >&2;}
-    (
-      cat <<\_ASBOX
-## ------------------------------ ##
-## Report this to the tcl lists.  ##
-## ------------------------------ ##
-_ASBOX
-    ) |
-      sed "s/^/$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 $ac_cv_header_limits_h = yes; then
-
-cat >>confdefs.h <<\_ACEOF
-#define HAVE_LIMITS_H 1
-_ACEOF
-
-else
-
-cat >>confdefs.h <<\_ACEOF
-#define NO_LIMITS_H 1
-_ACEOF
-
-fi
-
-
     if test "${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/tcl.m4 b/unix/tcl.m4
index 277fe0b..25c2699 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/tclConfig.h.in b/unix/tclConfig.h.in
index 10ae12f..a4ab3e5 100644
--- a/unix/tclConfig.h.in
+++ b/unix/tclConfig.h.in
@@ -127,9 +127,6 @@
 /* Define to 1 if you have the <libkern/OSAtomic.h> header file. */
 #undef HAVE_LIBKERN_OSATOMIC_H
 
-/* Do we have <limits.h>? */
-#undef HAVE_LIMITS_H
-
 /* Define to 1 if you have the `localtime_r' function. */
 #undef HAVE_LOCALTIME_R
 
@@ -313,9 +310,6 @@
 /* Do we have a usable 'isnan'? */
 #undef NO_ISNAN
 
-/* Do we have <limits.h>? */
-#undef NO_LIMITS_H
-
 /* Do we have memmove()? */
 #undef NO_MEMMOVE
 
diff --git a/unix/tclUnixPort.h b/unix/tclUnixPort.h
index f64d453..a9983be 100644
--- a/unix/tclUnixPort.h
+++ b/unix/tclUnixPort.h
@@ -144,11 +144,7 @@ typedef off_t		Tcl_SeekOffset;
 #if HAVE_INTTYPES_H
 #   include <inttypes.h>
 #endif
-#ifdef NO_LIMITS_H
-#   include "../compat/limits.h"
-#else
-#   include <limits.h>
-#endif
+#include <limits.h>
 #if HAVE_STDINT_H
 #   include <stdint.h>
 #endif