2 dnl Copyright (C) 2001-2018 Free Software Foundation, Inc.
3 dnl This file is free software; the Free Software Foundation
4 dnl gives unlimited permission to copy and/or distribute it,
5 dnl with or without modifications, as long as this notice is preserved.
7 dnl From Paul Eggert and Bruno Haible.
8 dnl Test whether <stdint.h> is supported or must be substituted.
12 AC_DEFUN_ONCE([gl_STDINT_H],
15 AC_REQUIRE([AC_CANONICAL_HOST]) dnl for cross-compiles
17 AC_REQUIRE([gl_LIMITS_H])
18 AC_REQUIRE([gt_TYPE_WINT_T])
20 dnl Check for long long int and unsigned long long int.
21 AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
22 if test $ac_cv_type_long_long_int = yes; then
27 AC_SUBST([HAVE_LONG_LONG_INT])
28 AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT])
29 if test $ac_cv_type_unsigned_long_long_int = yes; then
30 HAVE_UNSIGNED_LONG_LONG_INT=1
32 HAVE_UNSIGNED_LONG_LONG_INT=0
34 AC_SUBST([HAVE_UNSIGNED_LONG_LONG_INT])
36 dnl Check for <wchar.h>, in the same way as gl_WCHAR_H does.
37 AC_CHECK_HEADERS_ONCE([wchar.h])
38 if test $ac_cv_header_wchar_h = yes; then
43 AC_SUBST([HAVE_WCHAR_H])
45 dnl Check for <inttypes.h>.
46 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_inttypes_h.
47 if test $ac_cv_header_inttypes_h = yes; then
52 AC_SUBST([HAVE_INTTYPES_H])
54 dnl Check for <sys/types.h>.
55 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_sys_types_h.
56 if test $ac_cv_header_sys_types_h = yes; then
61 AC_SUBST([HAVE_SYS_TYPES_H])
63 gl_CHECK_NEXT_HEADERS([stdint.h])
64 if test $ac_cv_header_stdint_h = yes; then
69 AC_SUBST([HAVE_STDINT_H])
71 dnl Now see whether we need a substitute <stdint.h>.
72 if test $ac_cv_header_stdint_h = yes; then
73 AC_CACHE_CHECK([whether stdint.h conforms to C99],
74 [gl_cv_header_working_stdint_h],
75 [gl_cv_header_working_stdint_h=no
78 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
79 #define __STDC_CONSTANT_MACROS 1
80 #define __STDC_LIMIT_MACROS 1
82 /* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>. */
83 #if !(defined WCHAR_MIN && defined WCHAR_MAX)
84 #error "WCHAR_MIN, WCHAR_MAX not defined in <stdint.h>"
91 int8_t a1min = INT8_MIN;
94 int16_t a2 = INT16_MAX;
95 int16_t a2min = INT16_MIN;
98 int32_t a3 = INT32_MAX;
99 int32_t a3min = INT32_MIN;
102 int64_t a4 = INT64_MAX;
103 int64_t a4min = INT64_MIN;
106 uint8_t b1 = UINT8_MAX;
108 typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];
111 uint16_t b2 = UINT16_MAX;
114 uint32_t b3 = UINT32_MAX;
117 uint64_t b4 = UINT64_MAX;
119 int_least8_t c1 = INT8_C (0x7f);
120 int_least8_t c1max = INT_LEAST8_MAX;
121 int_least8_t c1min = INT_LEAST8_MIN;
122 int_least16_t c2 = INT16_C (0x7fff);
123 int_least16_t c2max = INT_LEAST16_MAX;
124 int_least16_t c2min = INT_LEAST16_MIN;
125 int_least32_t c3 = INT32_C (0x7fffffff);
126 int_least32_t c3max = INT_LEAST32_MAX;
127 int_least32_t c3min = INT_LEAST32_MIN;
128 int_least64_t c4 = INT64_C (0x7fffffffffffffff);
129 int_least64_t c4max = INT_LEAST64_MAX;
130 int_least64_t c4min = INT_LEAST64_MIN;
131 uint_least8_t d1 = UINT8_C (0xff);
132 uint_least8_t d1max = UINT_LEAST8_MAX;
133 uint_least16_t d2 = UINT16_C (0xffff);
134 uint_least16_t d2max = UINT_LEAST16_MAX;
135 uint_least32_t d3 = UINT32_C (0xffffffff);
136 uint_least32_t d3max = UINT_LEAST32_MAX;
137 uint_least64_t d4 = UINT64_C (0xffffffffffffffff);
138 uint_least64_t d4max = UINT_LEAST64_MAX;
139 int_fast8_t e1 = INT_FAST8_MAX;
140 int_fast8_t e1min = INT_FAST8_MIN;
141 int_fast16_t e2 = INT_FAST16_MAX;
142 int_fast16_t e2min = INT_FAST16_MIN;
143 int_fast32_t e3 = INT_FAST32_MAX;
144 int_fast32_t e3min = INT_FAST32_MIN;
145 int_fast64_t e4 = INT_FAST64_MAX;
146 int_fast64_t e4min = INT_FAST64_MIN;
147 uint_fast8_t f1 = UINT_FAST8_MAX;
148 uint_fast16_t f2 = UINT_FAST16_MAX;
149 uint_fast32_t f3 = UINT_FAST32_MAX;
150 uint_fast64_t f4 = UINT_FAST64_MAX;
152 intptr_t g = INTPTR_MAX;
153 intptr_t gmin = INTPTR_MIN;
156 uintptr_t h = UINTPTR_MAX;
158 intmax_t i = INTMAX_MAX;
159 uintmax_t j = UINTMAX_MAX;
161 /* Check that SIZE_MAX has the correct type, if possible. */
162 #if 201112 <= __STDC_VERSION__
163 int k = _Generic (SIZE_MAX, size_t: 0);
164 #elif (2 <= __GNUC__ || defined __IBM__TYPEOF__ \
165 || (0x5110 <= __SUNPRO_C && !__STDC__))
167 extern __typeof__ (SIZE_MAX) k;
170 #include <limits.h> /* for CHAR_BIT */
171 #define TYPE_MINIMUM(t) \
172 ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ TYPE_MAXIMUM (t)))
173 #define TYPE_MAXIMUM(t) \
174 ((t) ((t) 0 < (t) -1 \
176 : ((((t) 1 << (sizeof (t) * CHAR_BIT - 2)) - 1) * 2 + 1)))
179 PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t)
180 && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t)
182 /* Detect bug in FreeBSD 6.0 / ia64. */
183 int check_SIG_ATOMIC:
184 SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t)
185 && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t)
187 int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1;
189 WCHAR_MIN == TYPE_MINIMUM (wchar_t)
190 && WCHAR_MAX == TYPE_MAXIMUM (wchar_t)
192 /* Detect bug in mingw. */
194 WINT_MIN == TYPE_MINIMUM (wint_t)
195 && WINT_MAX == TYPE_MAXIMUM (wint_t)
198 /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */
200 (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
202 (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
204 /* Detect bugs in OpenBSD 3.9 stdint.h. */
206 int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
209 int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
212 int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
215 int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
217 int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
218 int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
219 int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
220 int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
221 int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
222 int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
223 int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
224 int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
225 int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
226 int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
227 int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
230 [dnl Determine whether the various *_MIN, *_MAX macros are usable
231 dnl in preprocessor expression. We could do it by compiling a test
232 dnl program for each of these macros. It is faster to run a program
233 dnl that inspects the macro expansion.
234 dnl This detects a bug on HP-UX 11.23/ia64.
237 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
238 #define __STDC_CONSTANT_MACROS 1
239 #define __STDC_LIMIT_MACROS 1
246 #define MVAL(macro) MVAL1(macro)
247 #define MVAL1(expression) #expression
248 static const char *macro_values[] =
278 for (mv = macro_values; *mv != NULL; mv++)
280 const char *value = *mv;
281 /* Test whether it looks like a cast expression. */
282 if (strncmp (value, "((unsigned int)"/*)*/, 15) == 0
283 || strncmp (value, "((unsigned short)"/*)*/, 17) == 0
284 || strncmp (value, "((unsigned char)"/*)*/, 16) == 0
285 || strncmp (value, "((int)"/*)*/, 6) == 0
286 || strncmp (value, "((signed short)"/*)*/, 15) == 0
287 || strncmp (value, "((signed char)"/*)*/, 14) == 0)
288 return mv - macro_values + 1;
292 [gl_cv_header_working_stdint_h=yes],
295 # Guess yes on native Windows.
296 mingw*) gl_cv_header_working_stdint_h="guessing yes" ;;
297 # In general, assume it works.
298 *) gl_cv_header_working_stdint_h="guessing yes" ;;
307 HAVE_SYS_INTTYPES_H=0
309 case "$gl_cv_header_working_stdint_h" in
312 dnl Now see whether the system <stdint.h> works without
313 dnl __STDC_CONSTANT_MACROS/__STDC_LIMIT_MACROS defined.
314 AC_CACHE_CHECK([whether stdint.h predates C++11],
315 [gl_cv_header_stdint_predates_cxx11_h],
316 [gl_cv_header_stdint_predates_cxx11_h=yes
319 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
324 intmax_t im = INTMAX_MAX;
325 int32_t i32 = INT32_C (0x7fffffff);
327 [gl_cv_header_stdint_predates_cxx11_h=no])])
329 if test "$gl_cv_header_stdint_predates_cxx11_h" = yes; then
330 AC_DEFINE([__STDC_CONSTANT_MACROS], [1],
331 [Define to 1 if the system <stdint.h> predates C++11.])
332 AC_DEFINE([__STDC_LIMIT_MACROS], [1],
333 [Define to 1 if the system <stdint.h> predates C++11.])
335 AC_CACHE_CHECK([whether stdint.h has UINTMAX_WIDTH etc.],
336 [gl_cv_header_stdint_width],
337 [gl_cv_header_stdint_width=no
340 /* Work if build is not clean. */
341 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1
342 #ifndef __STDC_WANT_IEC_60559_BFP_EXT__
343 #define __STDC_WANT_IEC_60559_BFP_EXT__ 1
347 int iw = UINTMAX_WIDTH;
349 [gl_cv_header_stdint_width=yes])])
350 if test "$gl_cv_header_stdint_width" = yes; then
355 dnl Check for <sys/inttypes.h>, and for
356 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
357 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
358 if test $ac_cv_header_sys_inttypes_h = yes; then
359 HAVE_SYS_INTTYPES_H=1
361 if test $ac_cv_header_sys_bitypes_h = yes; then
364 gl_STDINT_TYPE_PROPERTIES
368 dnl The substitute stdint.h needs the substitute limit.h's _GL_INTEGER_WIDTH.
371 AC_SUBST([HAVE_C99_STDINT_H])
372 AC_SUBST([HAVE_SYS_BITYPES_H])
373 AC_SUBST([HAVE_SYS_INTTYPES_H])
375 AM_CONDITIONAL([GL_GENERATE_STDINT_H], [test -n "$STDINT_H"])
378 dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
379 dnl Determine the size of each of the given types in bits.
380 AC_DEFUN([gl_STDINT_BITSIZEOF],
382 dnl Use a shell loop, to avoid bloating configure, and
383 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
385 dnl - extra AC_SUBST calls, so that the right substitutions are made.
386 m4_foreach_w([gltype], [$1],
387 [AH_TEMPLATE([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
388 [Define to the number of bits in type ']gltype['.])])
389 for gltype in $1 ; do
390 AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],
391 [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT],
393 #include <limits.h>], [result=unknown])
394 eval gl_cv_bitsizeof_${gltype}=\$result
396 eval result=\$gl_cv_bitsizeof_${gltype}
397 if test $result = unknown; then
398 dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,
399 dnl do a syntax check even on unused #if conditions and give an error
400 dnl on valid C code like this:
407 GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
408 AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
409 eval BITSIZEOF_${GLTYPE}=\$result
411 m4_foreach_w([gltype], [$1],
412 [AC_SUBST([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
415 dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)
416 dnl Determine the signedness of each of the given types.
417 dnl Define HAVE_SIGNED_TYPE if type is signed.
418 AC_DEFUN([gl_CHECK_TYPES_SIGNED],
420 dnl Use a shell loop, to avoid bloating configure, and
421 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
423 dnl - extra AC_SUBST calls, so that the right substitutions are made.
424 m4_foreach_w([gltype], [$1],
425 [AH_TEMPLATE([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
426 [Define to 1 if ']gltype[' is a signed integer type.])])
427 for gltype in $1 ; do
428 AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],
430 [AC_LANG_PROGRAM([$2[
431 int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],
432 result=yes, result=no)
433 eval gl_cv_type_${gltype}_signed=\$result
435 eval result=\$gl_cv_type_${gltype}_signed
436 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
437 if test "$result" = yes; then
438 AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], [1])
439 eval HAVE_SIGNED_${GLTYPE}=1
441 eval HAVE_SIGNED_${GLTYPE}=0
444 m4_foreach_w([gltype], [$1],
445 [AC_SUBST([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
448 dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)
449 dnl Determine the suffix to use for integer constants of the given types.
450 dnl Define t_SUFFIX for each such type.
451 AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
453 dnl Use a shell loop, to avoid bloating configure, and
454 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
456 dnl - extra AC_SUBST calls, so that the right substitutions are made.
457 m4_foreach_w([gltype], [$1],
458 [AH_TEMPLATE(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
459 [Define to l, ll, u, ul, ull, etc., as suitable for
460 constants of type ']gltype['.])])
461 for gltype in $1 ; do
462 AC_CACHE_CHECK([for $gltype integer literal suffix],
463 [gl_cv_type_${gltype}_suffix],
464 [eval gl_cv_type_${gltype}_suffix=no
465 eval result=\$gl_cv_type_${gltype}_signed
466 if test "$result" = yes; then
471 for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
474 l) gltype1='long int';;
475 ll) gltype1='long long int';;
476 i64) gltype1='__int64';;
477 u) gltype1='unsigned int';;
478 ul) gltype1='unsigned long int';;
479 ull) gltype1='unsigned long long int';;
480 ui64)gltype1='unsigned __int64';;
483 [AC_LANG_PROGRAM([$2[
485 extern $gltype1 foo;]])],
486 [eval gl_cv_type_${gltype}_suffix=\$glsuf])
487 eval result=\$gl_cv_type_${gltype}_suffix
488 test "$result" != no && break
490 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
491 eval result=\$gl_cv_type_${gltype}_suffix
492 test "$result" = no && result=
493 eval ${GLTYPE}_SUFFIX=\$result
494 AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], [$result])
496 m4_foreach_w([gltype], [$1],
497 [AC_SUBST(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
500 dnl gl_STDINT_INCLUDES
501 AC_DEFUN([gl_STDINT_INCLUDES],
503 /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
504 included before <wchar.h>. */
514 dnl gl_STDINT_TYPE_PROPERTIES
515 dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
516 dnl of interest to stdint.in.h.
517 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
519 AC_REQUIRE([gl_MULTIARCH])
520 if test $APPLE_UNIVERSAL_BUILD = 0; then
521 gl_STDINT_BITSIZEOF([ptrdiff_t size_t],
522 [gl_STDINT_INCLUDES])
524 gl_STDINT_BITSIZEOF([sig_atomic_t wchar_t wint_t],
525 [gl_STDINT_INCLUDES])
526 gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
527 [gl_STDINT_INCLUDES])
528 gl_cv_type_ptrdiff_t_signed=yes
529 gl_cv_type_size_t_signed=no
530 if test $APPLE_UNIVERSAL_BUILD = 0; then
531 gl_INTEGER_TYPE_SUFFIX([ptrdiff_t size_t],
532 [gl_STDINT_INCLUDES])
534 gl_INTEGER_TYPE_SUFFIX([sig_atomic_t wchar_t wint_t],
535 [gl_STDINT_INCLUDES])
537 dnl If wint_t is smaller than 'int', it cannot satisfy the ISO C 99
538 dnl requirement that wint_t is "unchanged by default argument promotions".
539 dnl In this case gnulib's <wchar.h> and <wctype.h> override wint_t.
540 dnl Set the variable BITSIZEOF_WINT_T accordingly.
541 if test $GNULIB_OVERRIDES_WINT_T = 1; then