summaryrefslogtreecommitdiffstats
path: root/gl/m4/stdint.m4
diff options
context:
space:
mode:
Diffstat (limited to 'gl/m4/stdint.m4')
-rw-r--r--gl/m4/stdint.m4169
1 files changed, 108 insertions, 61 deletions
diff --git a/gl/m4/stdint.m4 b/gl/m4/stdint.m4
index 27cdcdb..d6961b0 100644
--- a/gl/m4/stdint.m4
+++ b/gl/m4/stdint.m4
@@ -1,5 +1,5 @@
1# stdint.m4 serial 43 1# stdint.m4 serial 61
2dnl Copyright (C) 2001-2013 Free Software Foundation, Inc. 2dnl Copyright (C) 2001-2023 Free Software Foundation, Inc.
3dnl This file is free software; the Free Software Foundation 3dnl This file is free software; the Free Software Foundation
4dnl gives unlimited permission to copy and/or distribute it, 4dnl gives unlimited permission to copy and/or distribute it,
5dnl with or without modifications, as long as this notice is preserved. 5dnl with or without modifications, as long as this notice is preserved.
@@ -7,25 +7,22 @@ dnl with or without modifications, as long as this notice is preserved.
7dnl From Paul Eggert and Bruno Haible. 7dnl From Paul Eggert and Bruno Haible.
8dnl Test whether <stdint.h> is supported or must be substituted. 8dnl Test whether <stdint.h> is supported or must be substituted.
9 9
10AC_PREREQ([2.61])
11
10AC_DEFUN_ONCE([gl_STDINT_H], 12AC_DEFUN_ONCE([gl_STDINT_H],
11[ 13[
12 AC_PREREQ([2.59])dnl 14 AC_PREREQ([2.59])dnl
15 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
13 16
14 dnl Check for long long int and unsigned long long int. 17 AC_REQUIRE([gl_LIMITS_H])
15 AC_REQUIRE([AC_TYPE_LONG_LONG_INT]) 18 AC_REQUIRE([gt_TYPE_WINT_T])
16 if test $ac_cv_type_long_long_int = yes; then 19
17 HAVE_LONG_LONG_INT=1 20 dnl For backward compatibility. Some packages may still be testing these
18 else 21 dnl macros.
19 HAVE_LONG_LONG_INT=0 22 AC_DEFINE([HAVE_LONG_LONG_INT], [1],
20 fi 23 [Define to 1 if the system has the type 'long long int'.])
21 AC_SUBST([HAVE_LONG_LONG_INT]) 24 AC_DEFINE([HAVE_UNSIGNED_LONG_LONG_INT], [1],
22 AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT]) 25 [Define to 1 if the system has the type 'unsigned long long int'.])
23 if test $ac_cv_type_unsigned_long_long_int = yes; then
24 HAVE_UNSIGNED_LONG_LONG_INT=1
25 else
26 HAVE_UNSIGNED_LONG_LONG_INT=0
27 fi
28 AC_SUBST([HAVE_UNSIGNED_LONG_LONG_INT])
29 26
30 dnl Check for <wchar.h>, in the same way as gl_WCHAR_H does. 27 dnl Check for <wchar.h>, in the same way as gl_WCHAR_H does.
31 AC_CHECK_HEADERS_ONCE([wchar.h]) 28 AC_CHECK_HEADERS_ONCE([wchar.h])
@@ -37,7 +34,7 @@ AC_DEFUN_ONCE([gl_STDINT_H],
37 AC_SUBST([HAVE_WCHAR_H]) 34 AC_SUBST([HAVE_WCHAR_H])
38 35
39 dnl Check for <inttypes.h>. 36 dnl Check for <inttypes.h>.
40 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_inttypes_h. 37 AC_CHECK_HEADERS_ONCE([inttypes.h])
41 if test $ac_cv_header_inttypes_h = yes; then 38 if test $ac_cv_header_inttypes_h = yes; then
42 HAVE_INTTYPES_H=1 39 HAVE_INTTYPES_H=1
43 else 40 else
@@ -46,7 +43,7 @@ AC_DEFUN_ONCE([gl_STDINT_H],
46 AC_SUBST([HAVE_INTTYPES_H]) 43 AC_SUBST([HAVE_INTTYPES_H])
47 44
48 dnl Check for <sys/types.h>. 45 dnl Check for <sys/types.h>.
49 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_sys_types_h. 46 AC_CHECK_HEADERS_ONCE([sys/types.h])
50 if test $ac_cv_header_sys_types_h = yes; then 47 if test $ac_cv_header_sys_types_h = yes; then
51 HAVE_SYS_TYPES_H=1 48 HAVE_SYS_TYPES_H=1
52 else 49 else
@@ -70,6 +67,8 @@ AC_DEFUN_ONCE([gl_STDINT_H],
70 AC_COMPILE_IFELSE([ 67 AC_COMPILE_IFELSE([
71 AC_LANG_PROGRAM([[ 68 AC_LANG_PROGRAM([[
72#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */ 69#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
70#define __STDC_CONSTANT_MACROS 1
71#define __STDC_LIMIT_MACROS 1
73#include <stdint.h> 72#include <stdint.h>
74/* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>. */ 73/* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>. */
75#if !(defined WCHAR_MIN && defined WCHAR_MAX) 74#if !(defined WCHAR_MIN && defined WCHAR_MAX)
@@ -150,6 +149,15 @@ uintptr_t h = UINTPTR_MAX;
150intmax_t i = INTMAX_MAX; 149intmax_t i = INTMAX_MAX;
151uintmax_t j = UINTMAX_MAX; 150uintmax_t j = UINTMAX_MAX;
152 151
152/* Check that SIZE_MAX has the correct type, if possible. */
153#if 201112 <= __STDC_VERSION__
154int k = _Generic (SIZE_MAX, size_t: 0);
155#elif (2 <= __GNUC__ || 4 <= __clang_major__ || defined __IBM__TYPEOF__ \
156 || (0x5110 <= __SUNPRO_C && !__STDC__))
157extern size_t k;
158extern __typeof__ (SIZE_MAX) k;
159#endif
160
153#include <limits.h> /* for CHAR_BIT */ 161#include <limits.h> /* for CHAR_BIT */
154#define TYPE_MINIMUM(t) \ 162#define TYPE_MINIMUM(t) \
155 ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ TYPE_MAXIMUM (t))) 163 ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ TYPE_MAXIMUM (t)))
@@ -162,7 +170,7 @@ struct s {
162 PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t) 170 PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t)
163 && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t) 171 && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t)
164 ? 1 : -1; 172 ? 1 : -1;
165 /* Detect bug in FreeBSD 6.0 / ia64. */ 173 /* Detect bug in FreeBSD 6.0/ia64 and FreeBSD 13.0/arm64. */
166 int check_SIG_ATOMIC: 174 int check_SIG_ATOMIC:
167 SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t) 175 SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t)
168 && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t) 176 && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t)
@@ -218,6 +226,8 @@ struct s {
218 AC_RUN_IFELSE([ 226 AC_RUN_IFELSE([
219 AC_LANG_PROGRAM([[ 227 AC_LANG_PROGRAM([[
220#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */ 228#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
229#define __STDC_CONSTANT_MACROS 1
230#define __STDC_LIMIT_MACROS 1
221#include <stdint.h> 231#include <stdint.h>
222] 232]
223gl_STDINT_INCLUDES 233gl_STDINT_INCLUDES
@@ -272,36 +282,88 @@ static const char *macro_values[] =
272]])], 282]])],
273 [gl_cv_header_working_stdint_h=yes], 283 [gl_cv_header_working_stdint_h=yes],
274 [], 284 [],
275 [dnl When cross-compiling, assume it works. 285 [case "$host_os" in
276 gl_cv_header_working_stdint_h=yes 286 # Guess yes on native Windows.
287 mingw*) gl_cv_header_working_stdint_h="guessing yes" ;;
288 # In general, assume it works.
289 *) gl_cv_header_working_stdint_h="guessing yes" ;;
290 esac
277 ]) 291 ])
278 ]) 292 ])
279 ]) 293 ])
280 fi 294 fi
281 if test "$gl_cv_header_working_stdint_h" = yes; then
282 STDINT_H=
283 else
284 dnl Check for <sys/inttypes.h>, and for
285 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
286 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
287 if test $ac_cv_header_sys_inttypes_h = yes; then
288 HAVE_SYS_INTTYPES_H=1
289 else
290 HAVE_SYS_INTTYPES_H=0
291 fi
292 AC_SUBST([HAVE_SYS_INTTYPES_H])
293 if test $ac_cv_header_sys_bitypes_h = yes; then
294 HAVE_SYS_BITYPES_H=1
295 else
296 HAVE_SYS_BITYPES_H=0
297 fi
298 AC_SUBST([HAVE_SYS_BITYPES_H])
299 295
300 gl_STDINT_TYPE_PROPERTIES 296 HAVE_C99_STDINT_H=0
301 STDINT_H=stdint.h 297 HAVE_SYS_BITYPES_H=0
302 fi 298 HAVE_SYS_INTTYPES_H=0
303 AC_SUBST([STDINT_H]) 299 GL_GENERATE_STDINT_H=true
304 AM_CONDITIONAL([GL_GENERATE_STDINT_H], [test -n "$STDINT_H"]) 300 case "$gl_cv_header_working_stdint_h" in
301 *yes)
302 HAVE_C99_STDINT_H=1
303 dnl Now see whether the system <stdint.h> works without
304 dnl __STDC_CONSTANT_MACROS/__STDC_LIMIT_MACROS defined.
305 dnl If not, there would be problems when stdint.h is included from C++.
306 AC_CACHE_CHECK([whether stdint.h works without ISO C predefines],
307 [gl_cv_header_stdint_without_STDC_macros],
308 [gl_cv_header_stdint_without_STDC_macros=no
309 AC_COMPILE_IFELSE([
310 AC_LANG_PROGRAM([[
311#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
312#include <stdint.h>
313]
314gl_STDINT_INCLUDES
315[
316intmax_t im = INTMAX_MAX;
317int32_t i32 = INT32_C (0x7fffffff);
318 ]])],
319 [gl_cv_header_stdint_without_STDC_macros=yes])
320 ])
321
322 if test $gl_cv_header_stdint_without_STDC_macros = no; then
323 AC_DEFINE([__STDC_CONSTANT_MACROS], [1],
324 [Define to 1 if the system <stdint.h> predates C++11.])
325 AC_DEFINE([__STDC_LIMIT_MACROS], [1],
326 [Define to 1 if the system <stdint.h> predates C++11.])
327 fi
328 AC_CACHE_CHECK([whether stdint.h has UINTMAX_WIDTH etc.],
329 [gl_cv_header_stdint_width],
330 [gl_cv_header_stdint_width=no
331 AC_COMPILE_IFELSE(
332 [AC_LANG_PROGRAM([[
333 /* Work if build is not clean. */
334 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1
335 #ifndef __STDC_WANT_IEC_60559_BFP_EXT__
336 #define __STDC_WANT_IEC_60559_BFP_EXT__ 1
337 #endif
338 #include <stdint.h>
339 ]gl_STDINT_INCLUDES[
340 int iw = UINTMAX_WIDTH;
341 ]])],
342 [gl_cv_header_stdint_width=yes])])
343 if test "$gl_cv_header_stdint_width" = yes; then
344 GL_GENERATE_STDINT_H=false
345 fi
346 ;;
347 *)
348 dnl Check for <sys/inttypes.h>, and for
349 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
350 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
351 if test $ac_cv_header_sys_inttypes_h = yes; then
352 HAVE_SYS_INTTYPES_H=1
353 fi
354 if test $ac_cv_header_sys_bitypes_h = yes; then
355 HAVE_SYS_BITYPES_H=1
356 fi
357 gl_STDINT_TYPE_PROPERTIES
358 ;;
359 esac
360
361 dnl The substitute stdint.h needs the substitute limit.h's _GL_INTEGER_WIDTH.
362 gl_REPLACE_LIMITS_H
363
364 AC_SUBST([HAVE_C99_STDINT_H])
365 AC_SUBST([HAVE_SYS_BITYPES_H])
366 AC_SUBST([HAVE_SYS_INTTYPES_H])
305]) 367])
306 368
307dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES) 369dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
@@ -429,13 +491,9 @@ AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
429dnl gl_STDINT_INCLUDES 491dnl gl_STDINT_INCLUDES
430AC_DEFUN([gl_STDINT_INCLUDES], 492AC_DEFUN([gl_STDINT_INCLUDES],
431[[ 493[[
432 /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
433 included before <wchar.h>. */
434 #include <stddef.h> 494 #include <stddef.h>
435 #include <signal.h> 495 #include <signal.h>
436 #if HAVE_WCHAR_H 496 #if HAVE_WCHAR_H
437 # include <stdio.h>
438 # include <time.h>
439 # include <wchar.h> 497 # include <wchar.h>
440 #endif 498 #endif
441]]) 499]])
@@ -467,18 +525,7 @@ AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
467 dnl requirement that wint_t is "unchanged by default argument promotions". 525 dnl requirement that wint_t is "unchanged by default argument promotions".
468 dnl In this case gnulib's <wchar.h> and <wctype.h> override wint_t. 526 dnl In this case gnulib's <wchar.h> and <wctype.h> override wint_t.
469 dnl Set the variable BITSIZEOF_WINT_T accordingly. 527 dnl Set the variable BITSIZEOF_WINT_T accordingly.
470 if test $BITSIZEOF_WINT_T -lt 32; then 528 if test $GNULIBHEADERS_OVERRIDE_WINT_T = 1; then
471 BITSIZEOF_WINT_T=32 529 BITSIZEOF_WINT_T=32
472 fi 530 fi
473]) 531])
474
475dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
476dnl Remove this when we can assume autoconf >= 2.61.
477m4_ifdef([AC_COMPUTE_INT], [], [
478 AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
479])
480
481# Hey Emacs!
482# Local Variables:
483# indent-tabs-mode: nil
484# End: