2 dnl Copyright (C) 2001-2016 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.
10 AC_DEFUN_ONCE([gl_STDINT_H],
14 AC_REQUIRE([gl_LIMITS_H])
16 dnl Check for long long int and unsigned long long int.
17 AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
18 if test $ac_cv_type_long_long_int = yes; then
23 AC_SUBST([HAVE_LONG_LONG_INT])
24 AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT])
25 if test $ac_cv_type_unsigned_long_long_int = yes; then
26 HAVE_UNSIGNED_LONG_LONG_INT=1
28 HAVE_UNSIGNED_LONG_LONG_INT=0
30 AC_SUBST([HAVE_UNSIGNED_LONG_LONG_INT])
32 dnl Check for <wchar.h>, in the same way as gl_WCHAR_H does.
33 AC_CHECK_HEADERS_ONCE([wchar.h])
34 if test $ac_cv_header_wchar_h = yes; then
39 AC_SUBST([HAVE_WCHAR_H])
41 dnl Check for <inttypes.h>.
42 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_inttypes_h.
43 if test $ac_cv_header_inttypes_h = yes; then
48 AC_SUBST([HAVE_INTTYPES_H])
50 dnl Check for <sys/types.h>.
51 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_sys_types_h.
52 if test $ac_cv_header_sys_types_h = yes; then
57 AC_SUBST([HAVE_SYS_TYPES_H])
59 gl_CHECK_NEXT_HEADERS([stdint.h])
60 if test $ac_cv_header_stdint_h = yes; then
65 AC_SUBST([HAVE_STDINT_H])
67 dnl Now see whether we need a substitute <stdint.h>.
68 if test $ac_cv_header_stdint_h = yes; then
69 AC_CACHE_CHECK([whether stdint.h conforms to C99],
70 [gl_cv_header_working_stdint_h],
71 [gl_cv_header_working_stdint_h=no
74 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
75 #define __STDC_CONSTANT_MACROS 1
76 #define __STDC_LIMIT_MACROS 1
78 /* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>. */
79 #if !(defined WCHAR_MIN && defined WCHAR_MAX)
80 #error "WCHAR_MIN, WCHAR_MAX not defined in <stdint.h>"
87 int8_t a1min = INT8_MIN;
90 int16_t a2 = INT16_MAX;
91 int16_t a2min = INT16_MIN;
94 int32_t a3 = INT32_MAX;
95 int32_t a3min = INT32_MIN;
98 int64_t a4 = INT64_MAX;
99 int64_t a4min = INT64_MIN;
102 uint8_t b1 = UINT8_MAX;
104 typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];
107 uint16_t b2 = UINT16_MAX;
110 uint32_t b3 = UINT32_MAX;
113 uint64_t b4 = UINT64_MAX;
115 int_least8_t c1 = INT8_C (0x7f);
116 int_least8_t c1max = INT_LEAST8_MAX;
117 int_least8_t c1min = INT_LEAST8_MIN;
118 int_least16_t c2 = INT16_C (0x7fff);
119 int_least16_t c2max = INT_LEAST16_MAX;
120 int_least16_t c2min = INT_LEAST16_MIN;
121 int_least32_t c3 = INT32_C (0x7fffffff);
122 int_least32_t c3max = INT_LEAST32_MAX;
123 int_least32_t c3min = INT_LEAST32_MIN;
124 int_least64_t c4 = INT64_C (0x7fffffffffffffff);
125 int_least64_t c4max = INT_LEAST64_MAX;
126 int_least64_t c4min = INT_LEAST64_MIN;
127 uint_least8_t d1 = UINT8_C (0xff);
128 uint_least8_t d1max = UINT_LEAST8_MAX;
129 uint_least16_t d2 = UINT16_C (0xffff);
130 uint_least16_t d2max = UINT_LEAST16_MAX;
131 uint_least32_t d3 = UINT32_C (0xffffffff);
132 uint_least32_t d3max = UINT_LEAST32_MAX;
133 uint_least64_t d4 = UINT64_C (0xffffffffffffffff);
134 uint_least64_t d4max = UINT_LEAST64_MAX;
135 int_fast8_t e1 = INT_FAST8_MAX;
136 int_fast8_t e1min = INT_FAST8_MIN;
137 int_fast16_t e2 = INT_FAST16_MAX;
138 int_fast16_t e2min = INT_FAST16_MIN;
139 int_fast32_t e3 = INT_FAST32_MAX;
140 int_fast32_t e3min = INT_FAST32_MIN;
141 int_fast64_t e4 = INT_FAST64_MAX;
142 int_fast64_t e4min = INT_FAST64_MIN;
143 uint_fast8_t f1 = UINT_FAST8_MAX;
144 uint_fast16_t f2 = UINT_FAST16_MAX;
145 uint_fast32_t f3 = UINT_FAST32_MAX;
146 uint_fast64_t f4 = UINT_FAST64_MAX;
148 intptr_t g = INTPTR_MAX;
149 intptr_t gmin = INTPTR_MIN;
152 uintptr_t h = UINTPTR_MAX;
154 intmax_t i = INTMAX_MAX;
155 uintmax_t j = UINTMAX_MAX;
157 /* Check that SIZE_MAX has the correct type, if possible. */
158 #if 201112 <= __STDC_VERSION__
159 int k = _Generic (SIZE_MAX, size_t: 0);
160 #elif (2 <= __GNUC__ || defined __IBM__TYPEOF__ \
161 || (0x5110 <= __SUNPRO_C && !__STDC__))
163 extern __typeof__ (SIZE_MAX) k;
166 #include <limits.h> /* for CHAR_BIT */
167 #define TYPE_MINIMUM(t) \
168 ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ TYPE_MAXIMUM (t)))
169 #define TYPE_MAXIMUM(t) \
170 ((t) ((t) 0 < (t) -1 \
172 : ((((t) 1 << (sizeof (t) * CHAR_BIT - 2)) - 1) * 2 + 1)))
175 PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t)
176 && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t)
178 /* Detect bug in FreeBSD 6.0 / ia64. */
179 int check_SIG_ATOMIC:
180 SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t)
181 && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t)
183 int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1;
185 WCHAR_MIN == TYPE_MINIMUM (wchar_t)
186 && WCHAR_MAX == TYPE_MAXIMUM (wchar_t)
188 /* Detect bug in mingw. */
190 WINT_MIN == TYPE_MINIMUM (wint_t)
191 && WINT_MAX == TYPE_MAXIMUM (wint_t)
194 /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */
196 (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
198 (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
200 /* Detect bugs in OpenBSD 3.9 stdint.h. */
202 int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
205 int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
208 int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
211 int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
213 int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
214 int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
215 int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
216 int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
217 int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
218 int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
219 int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
220 int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
221 int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
222 int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
223 int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
226 [dnl Determine whether the various *_MIN, *_MAX macros are usable
227 dnl in preprocessor expression. We could do it by compiling a test
228 dnl program for each of these macros. It is faster to run a program
229 dnl that inspects the macro expansion.
230 dnl This detects a bug on HP-UX 11.23/ia64.
233 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
234 #define __STDC_CONSTANT_MACROS 1
235 #define __STDC_LIMIT_MACROS 1
242 #define MVAL(macro) MVAL1(macro)
243 #define MVAL1(expression) #expression
244 static const char *macro_values[] =
274 for (mv = macro_values; *mv != NULL; mv++)
276 const char *value = *mv;
277 /* Test whether it looks like a cast expression. */
278 if (strncmp (value, "((unsigned int)"/*)*/, 15) == 0
279 || strncmp (value, "((unsigned short)"/*)*/, 17) == 0
280 || strncmp (value, "((unsigned char)"/*)*/, 16) == 0
281 || strncmp (value, "((int)"/*)*/, 6) == 0
282 || strncmp (value, "((signed short)"/*)*/, 15) == 0
283 || strncmp (value, "((signed char)"/*)*/, 14) == 0)
284 return mv - macro_values + 1;
288 [gl_cv_header_working_stdint_h=yes],
290 [dnl When cross-compiling, assume it works.
291 gl_cv_header_working_stdint_h=yes
299 HAVE_SYS_INTTYPES_H=0
301 if test "$gl_cv_header_working_stdint_h" = yes; then
303 dnl Now see whether the system <stdint.h> works without
304 dnl __STDC_CONSTANT_MACROS/__STDC_LIMIT_MACROS defined.
305 AC_CACHE_CHECK([whether stdint.h predates C++11],
306 [gl_cv_header_stdint_predates_cxx11_h],
307 [gl_cv_header_stdint_predates_cxx11_h=yes
310 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
315 intmax_t im = INTMAX_MAX;
316 int32_t i32 = INT32_C (0x7fffffff);
318 [gl_cv_header_stdint_predates_cxx11_h=no])])
320 if test "$gl_cv_header_stdint_predates_cxx11_h" = yes; then
321 AC_DEFINE([__STDC_CONSTANT_MACROS], [1],
322 [Define to 1 if the system <stdint.h> predates C++11.])
323 AC_DEFINE([__STDC_LIMIT_MACROS], [1],
324 [Define to 1 if the system <stdint.h> predates C++11.])
326 AC_CACHE_CHECK([whether stdint.h has UINTMAX_WIDTH etc.],
327 [gl_cv_header_stdint_width],
328 [gl_cv_header_stdint_width=no
331 /* Work if build is not clean. */
332 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1
333 #ifndef __STDC_WANT_IEC_60559_BFP_EXT__
334 #define __STDC_WANT_IEC_60559_BFP_EXT__ 1
338 int iw = UINTMAX_WIDTH;
340 [gl_cv_header_stdint_width=yes])])
341 if test "$gl_cv_header_stdint_width" = yes; then
345 dnl Check for <sys/inttypes.h>, and for
346 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
347 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
348 if test $ac_cv_header_sys_inttypes_h = yes; then
349 HAVE_SYS_INTTYPES_H=1
351 if test $ac_cv_header_sys_bitypes_h = yes; then
354 gl_STDINT_TYPE_PROPERTIES
357 # The substitute stdint.h needs the substitute limit.h's _GL_INTEGER_WIDTH.
359 AM_CONDITIONAL([GL_GENERATE_LIMITS_H], [test -n "$LIMITS_H"])
361 AC_SUBST([HAVE_C99_STDINT_H])
362 AC_SUBST([HAVE_SYS_BITYPES_H])
363 AC_SUBST([HAVE_SYS_INTTYPES_H])
365 AM_CONDITIONAL([GL_GENERATE_STDINT_H], [test -n "$STDINT_H"])
368 dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
369 dnl Determine the size of each of the given types in bits.
370 AC_DEFUN([gl_STDINT_BITSIZEOF],
372 dnl Use a shell loop, to avoid bloating configure, and
373 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
375 dnl - extra AC_SUBST calls, so that the right substitutions are made.
376 m4_foreach_w([gltype], [$1],
377 [AH_TEMPLATE([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
378 [Define to the number of bits in type ']gltype['.])])
379 for gltype in $1 ; do
380 AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],
381 [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT],
383 #include <limits.h>], [result=unknown])
384 eval gl_cv_bitsizeof_${gltype}=\$result
386 eval result=\$gl_cv_bitsizeof_${gltype}
387 if test $result = unknown; then
388 dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,
389 dnl do a syntax check even on unused #if conditions and give an error
390 dnl on valid C code like this:
397 GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
398 AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
399 eval BITSIZEOF_${GLTYPE}=\$result
401 m4_foreach_w([gltype], [$1],
402 [AC_SUBST([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
405 dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)
406 dnl Determine the signedness of each of the given types.
407 dnl Define HAVE_SIGNED_TYPE if type is signed.
408 AC_DEFUN([gl_CHECK_TYPES_SIGNED],
410 dnl Use a shell loop, to avoid bloating configure, and
411 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
413 dnl - extra AC_SUBST calls, so that the right substitutions are made.
414 m4_foreach_w([gltype], [$1],
415 [AH_TEMPLATE([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
416 [Define to 1 if ']gltype[' is a signed integer type.])])
417 for gltype in $1 ; do
418 AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],
420 [AC_LANG_PROGRAM([$2[
421 int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],
422 result=yes, result=no)
423 eval gl_cv_type_${gltype}_signed=\$result
425 eval result=\$gl_cv_type_${gltype}_signed
426 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
427 if test "$result" = yes; then
428 AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], [1])
429 eval HAVE_SIGNED_${GLTYPE}=1
431 eval HAVE_SIGNED_${GLTYPE}=0
434 m4_foreach_w([gltype], [$1],
435 [AC_SUBST([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
438 dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)
439 dnl Determine the suffix to use for integer constants of the given types.
440 dnl Define t_SUFFIX for each such type.
441 AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
443 dnl Use a shell loop, to avoid bloating configure, and
444 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
446 dnl - extra AC_SUBST calls, so that the right substitutions are made.
447 m4_foreach_w([gltype], [$1],
448 [AH_TEMPLATE(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
449 [Define to l, ll, u, ul, ull, etc., as suitable for
450 constants of type ']gltype['.])])
451 for gltype in $1 ; do
452 AC_CACHE_CHECK([for $gltype integer literal suffix],
453 [gl_cv_type_${gltype}_suffix],
454 [eval gl_cv_type_${gltype}_suffix=no
455 eval result=\$gl_cv_type_${gltype}_signed
456 if test "$result" = yes; then
461 for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
464 l) gltype1='long int';;
465 ll) gltype1='long long int';;
466 i64) gltype1='__int64';;
467 u) gltype1='unsigned int';;
468 ul) gltype1='unsigned long int';;
469 ull) gltype1='unsigned long long int';;
470 ui64)gltype1='unsigned __int64';;
473 [AC_LANG_PROGRAM([$2[
475 extern $gltype1 foo;]])],
476 [eval gl_cv_type_${gltype}_suffix=\$glsuf])
477 eval result=\$gl_cv_type_${gltype}_suffix
478 test "$result" != no && break
480 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
481 eval result=\$gl_cv_type_${gltype}_suffix
482 test "$result" = no && result=
483 eval ${GLTYPE}_SUFFIX=\$result
484 AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], [$result])
486 m4_foreach_w([gltype], [$1],
487 [AC_SUBST(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
490 dnl gl_STDINT_INCLUDES
491 AC_DEFUN([gl_STDINT_INCLUDES],
493 /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
494 included before <wchar.h>. */
504 dnl gl_STDINT_TYPE_PROPERTIES
505 dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
506 dnl of interest to stdint.in.h.
507 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
509 AC_REQUIRE([gl_MULTIARCH])
510 if test $APPLE_UNIVERSAL_BUILD = 0; then
511 gl_STDINT_BITSIZEOF([ptrdiff_t size_t],
512 [gl_STDINT_INCLUDES])
514 gl_STDINT_BITSIZEOF([sig_atomic_t wchar_t wint_t],
515 [gl_STDINT_INCLUDES])
516 gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
517 [gl_STDINT_INCLUDES])
518 gl_cv_type_ptrdiff_t_signed=yes
519 gl_cv_type_size_t_signed=no
520 if test $APPLE_UNIVERSAL_BUILD = 0; then
521 gl_INTEGER_TYPE_SUFFIX([ptrdiff_t size_t],
522 [gl_STDINT_INCLUDES])
524 gl_INTEGER_TYPE_SUFFIX([sig_atomic_t wchar_t wint_t],
525 [gl_STDINT_INCLUDES])
527 dnl If wint_t is smaller than 'int', it cannot satisfy the ISO C 99
528 dnl requirement that wint_t is "unchanged by default argument promotions".
529 dnl In this case gnulib's <wchar.h> and <wctype.h> override wint_t.
530 dnl Set the variable BITSIZEOF_WINT_T accordingly.
531 if test $BITSIZEOF_WINT_T -lt 32; then
536 dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
537 dnl Remove this when we can assume autoconf >= 2.61.
538 m4_ifdef([AC_COMPUTE_INT], [], [
539 AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])