Rely on C89 <limits.h>

This requires newer metaconfig units that also rely on C89 <limits.h>.

Configure

@@ -992,7 +992,6 @@ i_ieeefp=''
 i_inttypes=''
 i_langinfo=''
 i_libutil=''
-i_limits=''
 i_locale=''
 i_machcthr=''
 i_malloc=''
@@ -12327,18 +12326,11 @@ esac
 set cuserid d_cuserid
 eval $inlibc
 
-: see if this is a limits.h system
-set limits.h i_limits
-eval $inhdr
-
 : See if number of significant digits in a double precision number is known
 echo " "
 $cat >dbl_dig.c <<EOM
-#$i_limits I_LIMITS
 #$i_float I_FLOAT
-#ifdef I_LIMITS
 #include <limits.h>
-#endif
 #ifdef I_FLOAT
 #include <float.h>
 #endif
@@ -16019,11 +16011,8 @@ eval $setvar
 : See if number of significant digits in a double precision number is known
 echo " "
 $cat >ldbl_dig.c <<EOM
-#$i_limits I_LIMITS
 #$i_float I_FLOAT
-#ifdef I_LIMITS
 #include <limits.h>
-#endif
 #ifdef I_FLOAT
 #include <float.h>
 #endif
@@ -24570,7 +24559,6 @@ i_ieeefp='$i_ieeefp'
 i_inttypes='$i_inttypes'
 i_langinfo='$i_langinfo'
 i_libutil='$i_libutil'
-i_limits='$i_limits'
 i_locale='$i_locale'
 i_machcthr='$i_machcthr'
 i_malloc='$i_malloc'

Cross/config.sh-arm-linux

@@ -749,7 +749,6 @@ i_ieeefp='undef'
 i_inttypes='define'
 i_langinfo='define'
 i_libutil='undef'
-i_limits='define'
 i_locale='define'
 i_machcthr='undef'
 i_malloc='define'

Cross/config.sh-arm-linux-n770

@@ -610,7 +610,6 @@ i_ieeefp='undef'
 i_inttypes='define'
 i_langinfo='define'
 i_libutil='undef'
-i_limits='define'
 i_locale='define'
 i_machcthr='undef'
 i_malloc='define'

NetWare/config.wc

@@ -731,7 +731,6 @@ i_ieeefp='undef'
 i_inttypes='undef'
 i_langinfo='undef'
 i_libutil='undef'
-i_limits='define'
 i_locale='define'
 i_machcthr='undef'
 i_malloc='define'

NetWare/config_H.wc

@@ -669,13 +669,6 @@
  */
 #define I_FLOAT		/**/
 
-/* I_LIMITS:
- *	This symbol, if defined, indicates to the C program that it should
- *	include <limits.h> to get definition of symbols like WORD_BIT or
- *	LONG_MAX, i.e. machine dependant limitations.
- */
-#define I_LIMITS		/**/
-
 /* I_LOCALE:
  *	This symbol, if defined, indicates to the C program that it should
  *	include <locale.h>.

Porting/Glossary

@@ -3493,11 +3493,6 @@ i_libutil (i_libutil.U):
 	This variable conditionally defines the I_LIBUTIL symbol, and indicates
 	whether a C program should include <libutil.h>.
 
-i_limits (i_limits.U):
-	This variable conditionally defines the I_LIMITS symbol, and indicates
-	whether a C program may include <limits.h> to get symbols like WORD_BIT
-	and friends.
-
 i_locale (i_locale.U):
 	This variable conditionally defines the I_LOCALE symbol,
 	and indicates whether a C program should include <locale.h>.

Porting/config.sh

@@ -767,7 +767,6 @@ i_ieeefp='undef'
 i_inttypes='define'
 i_langinfo='define'
 i_libutil='undef'
-i_limits='define'
 i_locale='define'
 i_machcthr='undef'
 i_malloc='undef'

Porting/config_H

@@ -627,13 +627,6 @@
  */
 #define I_GDBM	/**/
 
-/* I_LIMITS:
- *	This symbol, if defined, indicates to the C program that it should
- *	include <limits.h> to get definition of symbols like WORD_BIT or
- *	LONG_MAX, i.e. machine dependant limitations.
- */
-#define I_LIMITS		/**/
-
 /* I_LOCALE:
  *	This symbol, if defined, indicates to the C program that it should
  *	include <locale.h>.

cflags.SH

@@ -76,9 +76,7 @@ cat >_cflags.c <<__EOT__
 #include <stdlib.h>
 #include <stddef.h>
 #include <stdarg.h>
-#ifdef I_LIMITS
 #include <limits.h>
-#endif
 #ifdef I_DIRENT
 #include <dirent.h>
 #endif

config_h.SH

@@ -105,14 +105,6 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
  */
 #$d_cuserid HAS_CUSERID		/**/
 
-/* HAS_DBL_DIG:
- *	This symbol, if defined, indicates that this system's <float.h>
- *	or <limits.h> defines the symbol DBL_DIG, which is the number
- *	of significant digits in a double precision number.  If this
- *	symbol is not defined, a guess of 15 is usually pretty good.
- */
-#$d_dbl_dig HAS_DBL_DIG 	/**/
-
 /* HAS_DIFFTIME:
  *	This symbol, if defined, indicates that the difftime routine is
  *	available.
@@ -682,13 +674,6 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
  */
 #$i_gdbm I_GDBM	/**/
 
-/* I_LIMITS:
- *	This symbol, if defined, indicates to the C program that it should
- *	include <limits.h> to get definition of symbols like WORD_BIT or
- *	LONG_MAX, i.e. machine dependant limitations.
- */
-#$i_limits I_LIMITS		/**/
-
 /* I_LOCALE:
  *	This symbol, if defined, indicates to the C program that it should
  *	include <locale.h>.
@@ -1584,6 +1569,14 @@ sed <<!GROK!THIS! >$CONFIG_H -e 's!^#undef\(.*/\)\*!/\*#define\1 \*!' -e 's!^#un
 #define CSH "$full_csh"	/**/
 #endif
 
+/* HAS_DBL_DIG:
+ *	This symbol, if defined, indicates that this system's <float.h>
+ *	or <limits.h> defines the symbol DBL_DIG, which is the number
+ *	of significant digits in a double precision number.  If this
+ *	symbol is not defined, a guess of 15 is usually pretty good.
+ */
+#$d_dbl_dig HAS_DBL_DIG 	/**/
+
 /* HAS_DLADDR:
  *	This symbol, if defined, indicates that the dladdr() routine is
  *	available to query dynamic linker information for an address.

configure.com

@@ -6555,7 +6555,6 @@ $ WC "i_ieeefp='undef'"
 $ WC "i_inttypes='" + i_inttypes + "'"
 $ WC "i_langinfo='" + i_langinfo + "'"
 $ WC "i_libutil='" + i_libutil + "'"
-$ WC "i_limits='define'"
 $ WC "i_locale='" + i_locale + "'"
 $ WC "i_machcthr='undef'"
 $ WC "i_machcthreads='undef'"

ext/File-Glob/bsd_glob.c

@@ -87,9 +87,7 @@ static char sscsid[]=  "$OpenBSD: glob.c,v 1.8.10.1 2001/04/10 jason Exp $";
 #  endif
 #endif
 
-#ifdef I_LIMITS
 #include <limits.h>
-#endif
 
 #ifndef ARG_MAX
 #  ifdef _SC_ARG_MAX

ext/POSIX/POSIX.xs

@@ -42,9 +42,7 @@ static int not_here(const char *s);
 #include <fenv.h>
 #endif
 #endif
-#ifdef I_LIMITS
 #include <limits.h>
-#endif
 #include <locale.h>
 #include <math.h>
 #ifdef I_PWD

perl.h

@@ -1689,9 +1689,7 @@ typedef UVTYPE UV;
    a given precision of printing can be done with a double instead of
    a long double - Allen).
 */
-#ifdef I_LIMITS
 #include <limits.h>
-#endif
 #ifdef I_FLOAT
 #include <float.h>
 #endif
@@ -1711,9 +1709,7 @@ typedef UVTYPE UV;
    default value for printing floating point numbers in Gconvert.
    (see config.h)
 */
-# ifdef I_LIMITS
-#   include <limits.h>
-# endif
+# include <limits.h>
 # ifdef I_FLOAT
 #  include <float.h>
 # endif
@@ -1743,12 +1739,10 @@ typedef UVTYPE UV;
  * necessary to do so. - Allen <allens@cpan.org>
  */
 
-#ifdef I_LIMITS
-#  include <limits.h>
-#endif
+#include <limits.h>
 
 #ifdef I_VALUES
-#  if !(defined(DBL_MIN) && defined(DBL_MAX) && defined(I_LIMITS))
+#  if !defined(DBL_MIN) || !defined(DBL_MAX)
 #    include <values.h>
 #    if defined(MAXDOUBLE) && !defined(DBL_MAX)
 #      define DBL_MAX MAXDOUBLE
@@ -2340,9 +2334,7 @@ int isnan(double d);
  *    define PERL ULONG_MAX       4294967295L
  */
 
-#ifdef I_LIMITS  /* Needed for cast_xxx() functions below. */
-#  include <limits.h>
-#endif
+#include <limits.h>  /* Needed for cast_xxx() functions below. */
 /* Included values.h above if necessary; still including limits.h down here,
  * despite doing above, because math.h might have overridden... XXX - Allen */
 

plan9/config.plan9

@@ -673,13 +673,6 @@
  */
 #define I_FLOAT		/**/
 
-/* I_LIMITS:
- *	This symbol, if defined, indicates to the C program that it should
- *	include <limits.h> to get definition of symbols like WORD_BIT or
- *	LONG_MAX, i.e. machine dependant limitations.
- */
-#define I_LIMITS		/**/
-
 /* I_LOCALE:
  *	This symbol, if defined, indicates to the C program that it should
  *	include <locale.h>.

plan9/config_h.sample

@@ -637,13 +637,6 @@
  */
 #define I_FLOAT		/**/
 
-/* I_LIMITS:
- *	This symbol, if defined, indicates to the C program that it should
- *	include <limits.h> to get definition of symbols like WORD_BIT or
- *	LONG_MAX, i.e. machine dependant limitations.
- */
-#define I_LIMITS		/**/
-
 /* I_LOCALE:
  *	This symbol, if defined, indicates to the C program that it should
  *	include <locale.h>.

plan9/config_sh.sample

@@ -743,7 +743,6 @@ i_ieeefp='undef'
 i_inttypes='define'
 i_langinfo='undef'
 i_libutil='undef'
-i_limits='define'
 i_locale='define'
 i_machcthr='undef'
 i_malloc='undef'

symbian/config.sh

@@ -671,7 +671,6 @@ i_ieeefp='undef'
 i_inttypes='undef'
 i_langinfo='undef'
 i_libutil='undef'
-i_limits='define'
 i_locale='define'
 i_machcthr='undef'
 i_malloc='undef'

uconfig.h

@@ -70,14 +70,6 @@
  */
 /*#define HAS_CUSERID		/ **/
 
-/* HAS_DBL_DIG:
- *	This symbol, if defined, indicates that this system's <float.h>
- *	or <limits.h> defines the symbol DBL_DIG, which is the number
- *	of significant digits in a double precision number.  If this
- *	symbol is not defined, a guess of 15 is usually pretty good.
- */
-/*#define HAS_DBL_DIG 	/ **/
-
 /* HAS_DIFFTIME:
  *	This symbol, if defined, indicates that the difftime routine is
  *	available.
@@ -647,13 +639,6 @@
  */
 /*#define I_GDBM	/ **/
 
-/* I_LIMITS:
- *	This symbol, if defined, indicates to the C program that it should
- *	include <limits.h> to get definition of symbols like WORD_BIT or
- *	LONG_MAX, i.e. machine dependant limitations.
- */
-/*#define I_LIMITS		/ **/
-
 /* I_LOCALE:
  *	This symbol, if defined, indicates to the C program that it should
  *	include <locale.h>.
@@ -1549,6 +1534,14 @@
 #define CSH ""	/**/
 #endif
 
+/* HAS_DBL_DIG:
+ *	This symbol, if defined, indicates that this system's <float.h>
+ *	or <limits.h> defines the symbol DBL_DIG, which is the number
+ *	of significant digits in a double precision number.  If this
+ *	symbol is not defined, a guess of 15 is usually pretty good.
+ */
+/*#define HAS_DBL_DIG 	/ **/
+
 /* HAS_DLADDR:
  *	This symbol, if defined, indicates that the dladdr() routine is
  *	available to query dynamic linker information for an address.
@@ -5249,6 +5242,6 @@
 #endif
 
 /* Generated from:
- * ef59adc025306aceebb47a7515e514357b77e44a359af4bc0bf5d52082e41a26 config_h.SH
- * d40282b246b20f1f20a5febcae42b3ac44234c5a1c1a2df89e5ac77a54830cca uconfig.sh
+ * 82aa50fd961b36e3bc3ab644715698645fed961055bc70f4ad44ad88f51c25b0 config_h.SH
+ * 37da610aa9e38f4374ef9ce47cd7cd08240a33511faa8ee028f9e33ee76587ca uconfig.sh
  * ex: set ro: */

uconfig.sh

@@ -657,7 +657,6 @@ i_ieeefp='undef'
 i_inttypes='undef'
 i_langinfo='undef'
 i_libutil='undef'
-i_limits='undef'
 i_locale='undef'
 i_machcthr='undef'
 i_malloc='undef'

uconfig64.sh

@@ -657,7 +657,6 @@ i_ieeefp='undef'
 i_inttypes='undef'
 i_langinfo='undef'
 i_libutil='undef'
-i_limits='undef'
 i_locale='undef'
 i_machcthr='undef'
 i_malloc='undef'

win32/config.ce

@@ -727,7 +727,6 @@ i_ieeefp='undef'
 i_inttypes='undef'
 i_langinfo='undef'
 i_libutil='undef'
-i_limits='define'
 i_locale='define'
 i_machcthr='undef'
 i_malloc='define'

win32/config.gc

@@ -741,7 +741,6 @@ i_ieeefp='undef'
 i_inttypes='undef'
 i_langinfo='undef'
 i_libutil='undef'
-i_limits='define'
 i_locale='define'
 i_machcthr='undef'
 i_malloc='define'

win32/config.vc

@@ -738,7 +738,6 @@ i_ieeefp='undef'
 i_inttypes='undef'
 i_langinfo='undef'
 i_libutil='undef'
-i_limits='define'
 i_locale='define'
 i_machcthr='undef'
 i_malloc='define'

win32/config_H.ce

@@ -619,13 +619,6 @@
  */
 #define I_FLOAT		/**/
 
-/* I_LIMITS:
- *	This symbol, if defined, indicates to the C program that it should
- *	include <limits.h> to get definition of symbols like WORD_BIT or
- *	LONG_MAX, i.e. machine dependant limitations.
- */
-#define I_LIMITS		/**/
-
 /* I_LOCALE:
  *	This symbol, if defined, indicates to the C program that it should
  *	include <locale.h>.