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 dnl Check for long long int and unsigned long long int.
15 AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
16 if test $ac_cv_type_long_long_int = yes; then
21 AC_SUBST([HAVE_LONG_LONG_INT])
22 AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT])
23 if test $ac_cv_type_unsigned_long_long_int = yes; then
24 HAVE_UNSIGNED_LONG_LONG_INT=1
26 HAVE_UNSIGNED_LONG_LONG_INT=0
28 AC_SUBST([HAVE_UNSIGNED_LONG_LONG_INT])
30 dnl Check for <wchar.h>, in the same way as gl_WCHAR_H does.
31 AC_CHECK_HEADERS_ONCE([wchar.h])
32 if test $ac_cv_header_wchar_h = yes; then
37 AC_SUBST([HAVE_WCHAR_H])
39 dnl Check for <inttypes.h>.
40 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_inttypes_h.
41 if test $ac_cv_header_inttypes_h = yes; then
46 AC_SUBST([HAVE_INTTYPES_H])
48 dnl Check for <sys/types.h>.
49 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_sys_types_h.
50 if test $ac_cv_header_sys_types_h = yes; then
55 AC_SUBST([HAVE_SYS_TYPES_H])
57 gl_CHECK_NEXT_HEADERS([stdint.h])
58 if test $ac_cv_header_stdint_h = yes; then
63 AC_SUBST([HAVE_STDINT_H])
65 dnl Now see whether we need a substitute <stdint.h>.
66 if test $ac_cv_header_stdint_h = yes; then
67 AC_CACHE_CHECK([whether stdint.h conforms to C99],
68 [gl_cv_header_working_stdint_h],
69 [gl_cv_header_working_stdint_h=no
72 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
73 #define __STDC_CONSTANT_MACROS 1
74 #define __STDC_LIMIT_MACROS 1
76 /* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>. */
77 #if !(defined WCHAR_MIN && defined WCHAR_MAX)
78 #error "WCHAR_MIN, WCHAR_MAX not defined in <stdint.h>"
85 int8_t a1min = INT8_MIN;
88 int16_t a2 = INT16_MAX;
89 int16_t a2min = INT16_MIN;
92 int32_t a3 = INT32_MAX;
93 int32_t a3min = INT32_MIN;
96 int64_t a4 = INT64_MAX;
97 int64_t a4min = INT64_MIN;
100 uint8_t b1 = UINT8_MAX;
102 typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];
105 uint16_t b2 = UINT16_MAX;
108 uint32_t b3 = UINT32_MAX;
111 uint64_t b4 = UINT64_MAX;
113 int_least8_t c1 = INT8_C (0x7f);
114 int_least8_t c1max = INT_LEAST8_MAX;
115 int_least8_t c1min = INT_LEAST8_MIN;
116 int_least16_t c2 = INT16_C (0x7fff);
117 int_least16_t c2max = INT_LEAST16_MAX;
118 int_least16_t c2min = INT_LEAST16_MIN;
119 int_least32_t c3 = INT32_C (0x7fffffff);
120 int_least32_t c3max = INT_LEAST32_MAX;
121 int_least32_t c3min = INT_LEAST32_MIN;
122 int_least64_t c4 = INT64_C (0x7fffffffffffffff);
123 int_least64_t c4max = INT_LEAST64_MAX;
124 int_least64_t c4min = INT_LEAST64_MIN;
125 uint_least8_t d1 = UINT8_C (0xff);
126 uint_least8_t d1max = UINT_LEAST8_MAX;
127 uint_least16_t d2 = UINT16_C (0xffff);
128 uint_least16_t d2max = UINT_LEAST16_MAX;
129 uint_least32_t d3 = UINT32_C (0xffffffff);
130 uint_least32_t d3max = UINT_LEAST32_MAX;
131 uint_least64_t d4 = UINT64_C (0xffffffffffffffff);
132 uint_least64_t d4max = UINT_LEAST64_MAX;
133 int_fast8_t e1 = INT_FAST8_MAX;
134 int_fast8_t e1min = INT_FAST8_MIN;
135 int_fast16_t e2 = INT_FAST16_MAX;
136 int_fast16_t e2min = INT_FAST16_MIN;
137 int_fast32_t e3 = INT_FAST32_MAX;
138 int_fast32_t e3min = INT_FAST32_MIN;
139 int_fast64_t e4 = INT_FAST64_MAX;
140 int_fast64_t e4min = INT_FAST64_MIN;
141 uint_fast8_t f1 = UINT_FAST8_MAX;
142 uint_fast16_t f2 = UINT_FAST16_MAX;
143 uint_fast32_t f3 = UINT_FAST32_MAX;
144 uint_fast64_t f4 = UINT_FAST64_MAX;
146 intptr_t g = INTPTR_MAX;
147 intptr_t gmin = INTPTR_MIN;
150 uintptr_t h = UINTPTR_MAX;
152 intmax_t i = INTMAX_MAX;
153 uintmax_t j = UINTMAX_MAX;
155 #include <limits.h> /* for CHAR_BIT */
156 #define TYPE_MINIMUM(t) \
157 ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ TYPE_MAXIMUM (t)))
158 #define TYPE_MAXIMUM(t) \
159 ((t) ((t) 0 < (t) -1 \
161 : ((((t) 1 << (sizeof (t) * CHAR_BIT - 2)) - 1) * 2 + 1)))
164 PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t)
165 && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t)
167 /* Detect bug in FreeBSD 6.0 / ia64. */
168 int check_SIG_ATOMIC:
169 SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t)
170 && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t)
172 int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1;
174 WCHAR_MIN == TYPE_MINIMUM (wchar_t)
175 && WCHAR_MAX == TYPE_MAXIMUM (wchar_t)
177 /* Detect bug in mingw. */
179 WINT_MIN == TYPE_MINIMUM (wint_t)
180 && WINT_MAX == TYPE_MAXIMUM (wint_t)
183 /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */
185 (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
187 (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
189 /* Detect bugs in OpenBSD 3.9 stdint.h. */
191 int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
194 int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
197 int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
200 int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
202 int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
203 int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
204 int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
205 int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
206 int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
207 int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
208 int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
209 int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
210 int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
211 int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
212 int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
215 [dnl Determine whether the various *_MIN, *_MAX macros are usable
216 dnl in preprocessor expression. We could do it by compiling a test
217 dnl program for each of these macros. It is faster to run a program
218 dnl that inspects the macro expansion.
219 dnl This detects a bug on HP-UX 11.23/ia64.
222 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
223 #define __STDC_CONSTANT_MACROS 1
224 #define __STDC_LIMIT_MACROS 1
231 #define MVAL(macro) MVAL1(macro)
232 #define MVAL1(expression) #expression
233 static const char *macro_values[] =
263 for (mv = macro_values; *mv != NULL; mv++)
265 const char *value = *mv;
266 /* Test whether it looks like a cast expression. */
267 if (strncmp (value, "((unsigned int)"/*)*/, 15) == 0
268 || strncmp (value, "((unsigned short)"/*)*/, 17) == 0
269 || strncmp (value, "((unsigned char)"/*)*/, 16) == 0
270 || strncmp (value, "((int)"/*)*/, 6) == 0
271 || strncmp (value, "((signed short)"/*)*/, 15) == 0
272 || strncmp (value, "((signed char)"/*)*/, 14) == 0)
273 return mv - macro_values + 1;
277 [gl_cv_header_working_stdint_h=yes],
279 [dnl When cross-compiling, assume it works.
280 gl_cv_header_working_stdint_h=yes
285 if test "$gl_cv_header_working_stdint_h" = yes; then
286 dnl Now see whether the system <stdint.h> works without
287 dnl __STDC_CONSTANT_MACROS/__STDC_LIMIT_MACROS defined.
288 AC_CACHE_CHECK([whether stdint.h predates C++11],
289 [gl_cv_header_stdint_predates_cxx11_h],
290 [gl_cv_header_stdint_predates_cxx11_h=yes
293 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
298 intmax_t im = INTMAX_MAX;
299 int32_t i32 = INT32_C (0x7fffffff);
301 [gl_cv_header_stdint_predates_cxx11_h=no])])
303 if test "$gl_cv_header_stdint_predates_cxx11_h" = yes; then
304 AC_DEFINE([__STDC_CONSTANT_MACROS], [1],
305 [Define to 1 if the system <stdint.h> predates C++11.])
306 AC_DEFINE([__STDC_LIMIT_MACROS], [1],
307 [Define to 1 if the system <stdint.h> predates C++11.])
311 dnl Check for <sys/inttypes.h>, and for
312 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
313 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
314 if test $ac_cv_header_sys_inttypes_h = yes; then
315 HAVE_SYS_INTTYPES_H=1
317 HAVE_SYS_INTTYPES_H=0
319 AC_SUBST([HAVE_SYS_INTTYPES_H])
320 if test $ac_cv_header_sys_bitypes_h = yes; then
325 AC_SUBST([HAVE_SYS_BITYPES_H])
327 gl_STDINT_TYPE_PROPERTIES
331 AM_CONDITIONAL([GL_GENERATE_STDINT_H], [test -n "$STDINT_H"])
334 dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
335 dnl Determine the size of each of the given types in bits.
336 AC_DEFUN([gl_STDINT_BITSIZEOF],
338 dnl Use a shell loop, to avoid bloating configure, and
339 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
341 dnl - extra AC_SUBST calls, so that the right substitutions are made.
342 m4_foreach_w([gltype], [$1],
343 [AH_TEMPLATE([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
344 [Define to the number of bits in type ']gltype['.])])
345 for gltype in $1 ; do
346 AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],
347 [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT],
349 #include <limits.h>], [result=unknown])
350 eval gl_cv_bitsizeof_${gltype}=\$result
352 eval result=\$gl_cv_bitsizeof_${gltype}
353 if test $result = unknown; then
354 dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,
355 dnl do a syntax check even on unused #if conditions and give an error
356 dnl on valid C code like this:
363 GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
364 AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
365 eval BITSIZEOF_${GLTYPE}=\$result
367 m4_foreach_w([gltype], [$1],
368 [AC_SUBST([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
371 dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)
372 dnl Determine the signedness of each of the given types.
373 dnl Define HAVE_SIGNED_TYPE if type is signed.
374 AC_DEFUN([gl_CHECK_TYPES_SIGNED],
376 dnl Use a shell loop, to avoid bloating configure, and
377 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
379 dnl - extra AC_SUBST calls, so that the right substitutions are made.
380 m4_foreach_w([gltype], [$1],
381 [AH_TEMPLATE([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
382 [Define to 1 if ']gltype[' is a signed integer type.])])
383 for gltype in $1 ; do
384 AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],
386 [AC_LANG_PROGRAM([$2[
387 int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],
388 result=yes, result=no)
389 eval gl_cv_type_${gltype}_signed=\$result
391 eval result=\$gl_cv_type_${gltype}_signed
392 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
393 if test "$result" = yes; then
394 AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], [1])
395 eval HAVE_SIGNED_${GLTYPE}=1
397 eval HAVE_SIGNED_${GLTYPE}=0
400 m4_foreach_w([gltype], [$1],
401 [AC_SUBST([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
404 dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)
405 dnl Determine the suffix to use for integer constants of the given types.
406 dnl Define t_SUFFIX for each such type.
407 AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
409 dnl Use a shell loop, to avoid bloating configure, and
410 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
412 dnl - extra AC_SUBST calls, so that the right substitutions are made.
413 m4_foreach_w([gltype], [$1],
414 [AH_TEMPLATE(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
415 [Define to l, ll, u, ul, ull, etc., as suitable for
416 constants of type ']gltype['.])])
417 for gltype in $1 ; do
418 AC_CACHE_CHECK([for $gltype integer literal suffix],
419 [gl_cv_type_${gltype}_suffix],
420 [eval gl_cv_type_${gltype}_suffix=no
421 eval result=\$gl_cv_type_${gltype}_signed
422 if test "$result" = yes; then
427 for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
430 l) gltype1='long int';;
431 ll) gltype1='long long int';;
432 i64) gltype1='__int64';;
433 u) gltype1='unsigned int';;
434 ul) gltype1='unsigned long int';;
435 ull) gltype1='unsigned long long int';;
436 ui64)gltype1='unsigned __int64';;
439 [AC_LANG_PROGRAM([$2[
441 extern $gltype1 foo;]])],
442 [eval gl_cv_type_${gltype}_suffix=\$glsuf])
443 eval result=\$gl_cv_type_${gltype}_suffix
444 test "$result" != no && break
446 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
447 eval result=\$gl_cv_type_${gltype}_suffix
448 test "$result" = no && result=
449 eval ${GLTYPE}_SUFFIX=\$result
450 AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], [$result])
452 m4_foreach_w([gltype], [$1],
453 [AC_SUBST(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
456 dnl gl_STDINT_INCLUDES
457 AC_DEFUN([gl_STDINT_INCLUDES],
459 /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
460 included before <wchar.h>. */
470 dnl gl_STDINT_TYPE_PROPERTIES
471 dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
472 dnl of interest to stdint.in.h.
473 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
475 AC_REQUIRE([gl_MULTIARCH])
476 if test $APPLE_UNIVERSAL_BUILD = 0; then
477 gl_STDINT_BITSIZEOF([ptrdiff_t size_t],
478 [gl_STDINT_INCLUDES])
480 gl_STDINT_BITSIZEOF([sig_atomic_t wchar_t wint_t],
481 [gl_STDINT_INCLUDES])
482 gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
483 [gl_STDINT_INCLUDES])
484 gl_cv_type_ptrdiff_t_signed=yes
485 gl_cv_type_size_t_signed=no
486 if test $APPLE_UNIVERSAL_BUILD = 0; then
487 gl_INTEGER_TYPE_SUFFIX([ptrdiff_t size_t],
488 [gl_STDINT_INCLUDES])
490 gl_INTEGER_TYPE_SUFFIX([sig_atomic_t wchar_t wint_t],
491 [gl_STDINT_INCLUDES])
493 dnl If wint_t is smaller than 'int', it cannot satisfy the ISO C 99
494 dnl requirement that wint_t is "unchanged by default argument promotions".
495 dnl In this case gnulib's <wchar.h> and <wctype.h> override wint_t.
496 dnl Set the variable BITSIZEOF_WINT_T accordingly.
497 if test $BITSIZEOF_WINT_T -lt 32; then
502 dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
503 dnl Remove this when we can assume autoconf >= 2.61.
504 m4_ifdef([AC_COMPUTE_INT], [], [
505 AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
510 # indent-tabs-mode: nil