2 dnl Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3 dnl 2010 Free Software Foundation, Inc.
4 dnl This file is free software; the Free Software Foundation
5 dnl gives unlimited permission to copy and/or distribute it,
6 dnl with or without modifications, as long as this notice is preserved.
8 dnl From Paul Eggert and Bruno Haible.
9 dnl Test whether <stdint.h> is supported or must be substituted.
11 AC_DEFUN([gl_STDINT_H],
15 dnl Check for long long int and unsigned long long int.
16 AC_REQUIRE([AC_TYPE_LONG_LONG_INT])
17 if test $ac_cv_type_long_long_int = yes; then
22 AC_SUBST([HAVE_LONG_LONG_INT])
23 AC_REQUIRE([AC_TYPE_UNSIGNED_LONG_LONG_INT])
24 if test $ac_cv_type_unsigned_long_long_int = yes; then
25 HAVE_UNSIGNED_LONG_LONG_INT=1
27 HAVE_UNSIGNED_LONG_LONG_INT=0
29 AC_SUBST([HAVE_UNSIGNED_LONG_LONG_INT])
31 dnl Check for <inttypes.h>.
32 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_inttypes_h.
33 if test $ac_cv_header_inttypes_h = yes; then
38 AC_SUBST([HAVE_INTTYPES_H])
40 dnl Check for <sys/types.h>.
41 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_sys_types_h.
42 if test $ac_cv_header_sys_types_h = yes; then
47 AC_SUBST([HAVE_SYS_TYPES_H])
49 gl_CHECK_NEXT_HEADERS([stdint.h])
50 if test $ac_cv_header_stdint_h = yes; then
55 AC_SUBST([HAVE_STDINT_H])
57 dnl Now see whether we need a substitute <stdint.h>.
58 if test $ac_cv_header_stdint_h = yes; then
59 AC_CACHE_CHECK([whether stdint.h conforms to C99],
60 [gl_cv_header_working_stdint_h],
61 [gl_cv_header_working_stdint_h=no
64 #define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */
65 #define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */
66 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
68 /* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>. */
69 #if !(defined WCHAR_MIN && defined WCHAR_MAX)
70 #error "WCHAR_MIN, WCHAR_MAX not defined in <stdint.h>"
77 int8_t a1min = INT8_MIN;
80 int16_t a2 = INT16_MAX;
81 int16_t a2min = INT16_MIN;
84 int32_t a3 = INT32_MAX;
85 int32_t a3min = INT32_MIN;
88 int64_t a4 = INT64_MAX;
89 int64_t a4min = INT64_MIN;
92 uint8_t b1 = UINT8_MAX;
94 typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];
97 uint16_t b2 = UINT16_MAX;
100 uint32_t b3 = UINT32_MAX;
103 uint64_t b4 = UINT64_MAX;
105 int_least8_t c1 = INT8_C (0x7f);
106 int_least8_t c1max = INT_LEAST8_MAX;
107 int_least8_t c1min = INT_LEAST8_MIN;
108 int_least16_t c2 = INT16_C (0x7fff);
109 int_least16_t c2max = INT_LEAST16_MAX;
110 int_least16_t c2min = INT_LEAST16_MIN;
111 int_least32_t c3 = INT32_C (0x7fffffff);
112 int_least32_t c3max = INT_LEAST32_MAX;
113 int_least32_t c3min = INT_LEAST32_MIN;
114 int_least64_t c4 = INT64_C (0x7fffffffffffffff);
115 int_least64_t c4max = INT_LEAST64_MAX;
116 int_least64_t c4min = INT_LEAST64_MIN;
117 uint_least8_t d1 = UINT8_C (0xff);
118 uint_least8_t d1max = UINT_LEAST8_MAX;
119 uint_least16_t d2 = UINT16_C (0xffff);
120 uint_least16_t d2max = UINT_LEAST16_MAX;
121 uint_least32_t d3 = UINT32_C (0xffffffff);
122 uint_least32_t d3max = UINT_LEAST32_MAX;
123 uint_least64_t d4 = UINT64_C (0xffffffffffffffff);
124 uint_least64_t d4max = UINT_LEAST64_MAX;
125 int_fast8_t e1 = INT_FAST8_MAX;
126 int_fast8_t e1min = INT_FAST8_MIN;
127 int_fast16_t e2 = INT_FAST16_MAX;
128 int_fast16_t e2min = INT_FAST16_MIN;
129 int_fast32_t e3 = INT_FAST32_MAX;
130 int_fast32_t e3min = INT_FAST32_MIN;
131 int_fast64_t e4 = INT_FAST64_MAX;
132 int_fast64_t e4min = INT_FAST64_MIN;
133 uint_fast8_t f1 = UINT_FAST8_MAX;
134 uint_fast16_t f2 = UINT_FAST16_MAX;
135 uint_fast32_t f3 = UINT_FAST32_MAX;
136 uint_fast64_t f4 = UINT_FAST64_MAX;
138 intptr_t g = INTPTR_MAX;
139 intptr_t gmin = INTPTR_MIN;
142 uintptr_t h = UINTPTR_MAX;
144 intmax_t i = INTMAX_MAX;
145 uintmax_t j = UINTMAX_MAX;
147 #include <limits.h> /* for CHAR_BIT */
148 #define TYPE_MINIMUM(t) \
149 ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1)))
150 #define TYPE_MAXIMUM(t) \
151 ((t) ((t) 0 < (t) -1 ? (t) -1 : ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))))
154 PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t)
155 && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t)
157 /* Detect bug in FreeBSD 6.0 / ia64. */
158 int check_SIG_ATOMIC:
159 SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t)
160 && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t)
162 int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1;
164 WCHAR_MIN == TYPE_MINIMUM (wchar_t)
165 && WCHAR_MAX == TYPE_MAXIMUM (wchar_t)
167 /* Detect bug in mingw. */
169 WINT_MIN == TYPE_MINIMUM (wint_t)
170 && WINT_MAX == TYPE_MAXIMUM (wint_t)
173 /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */
175 (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
177 (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
179 /* Detect bugs in OpenBSD 3.9 stdint.h. */
181 int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
184 int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
187 int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
190 int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
192 int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
193 int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
194 int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
195 int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
196 int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
197 int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
198 int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
199 int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
200 int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
201 int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
202 int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
205 [dnl Determine whether the various *_MIN, *_MAX macros are usable
206 dnl in preprocessor expression. We could do it by compiling a test
207 dnl program for each of these macros. It is faster to run a program
208 dnl that inspects the macro expansion.
209 dnl This detects a bug on HP-UX 11.23/ia64.
212 #define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */
213 #define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */
214 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
221 #define MVAL(macro) MVAL1(macro)
222 #define MVAL1(expression) #expression
223 static const char *macro_values[] =
253 for (mv = macro_values; *mv != NULL; mv++)
255 const char *value = *mv;
256 /* Test whether it looks like a cast expression. */
257 if (strncmp (value, "((unsigned int)"/*)*/, 15) == 0
258 || strncmp (value, "((unsigned short)"/*)*/, 17) == 0
259 || strncmp (value, "((unsigned char)"/*)*/, 16) == 0
260 || strncmp (value, "((int)"/*)*/, 6) == 0
261 || strncmp (value, "((signed short)"/*)*/, 15) == 0
262 || strncmp (value, "((signed char)"/*)*/, 14) == 0)
267 [gl_cv_header_working_stdint_h=yes],
269 [dnl When cross-compiling, assume it works.
270 gl_cv_header_working_stdint_h=yes
275 if test "$gl_cv_header_working_stdint_h" = yes; then
278 dnl Check for <sys/inttypes.h>, and for
279 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
280 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
281 if test $ac_cv_header_sys_inttypes_h = yes; then
282 HAVE_SYS_INTTYPES_H=1
284 HAVE_SYS_INTTYPES_H=0
286 AC_SUBST([HAVE_SYS_INTTYPES_H])
287 if test $ac_cv_header_sys_bitypes_h = yes; then
292 AC_SUBST([HAVE_SYS_BITYPES_H])
294 dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
295 dnl character support).
296 AC_CHECK_HEADERS_ONCE([wchar.h])
298 gl_STDINT_TYPE_PROPERTIES
304 dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
305 dnl Determine the size of each of the given types in bits.
306 AC_DEFUN([gl_STDINT_BITSIZEOF],
308 dnl Use a shell loop, to avoid bloating configure, and
309 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
311 dnl - extra AC_SUBST calls, so that the right substitutions are made.
312 m4_foreach_w([gltype], [$1],
313 [AH_TEMPLATE([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
314 [Define to the number of bits in type ']gltype['.])])
315 for gltype in $1 ; do
316 AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],
317 [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT],
319 #include <limits.h>], [result=unknown])
320 eval gl_cv_bitsizeof_${gltype}=\$result
322 eval result=\$gl_cv_bitsizeof_${gltype}
323 if test $result = unknown; then
324 dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,
325 dnl do a syntax check even on unused #if conditions and give an error
326 dnl on valid C code like this:
333 GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
334 AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
335 eval BITSIZEOF_${GLTYPE}=\$result
337 m4_foreach_w([gltype], [$1],
338 [AC_SUBST([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
341 dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)
342 dnl Determine the signedness of each of the given types.
343 dnl Define HAVE_SIGNED_TYPE if type is signed.
344 AC_DEFUN([gl_CHECK_TYPES_SIGNED],
346 dnl Use a shell loop, to avoid bloating configure, and
347 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
349 dnl - extra AC_SUBST calls, so that the right substitutions are made.
350 m4_foreach_w([gltype], [$1],
351 [AH_TEMPLATE([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
352 [Define to 1 if ']gltype[' is a signed integer type.])])
353 for gltype in $1 ; do
354 AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],
356 [AC_LANG_PROGRAM([$2[
357 int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],
358 result=yes, result=no)
359 eval gl_cv_type_${gltype}_signed=\$result
361 eval result=\$gl_cv_type_${gltype}_signed
362 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
363 if test "$result" = yes; then
364 AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], [1])
365 eval HAVE_SIGNED_${GLTYPE}=1
367 eval HAVE_SIGNED_${GLTYPE}=0
370 m4_foreach_w([gltype], [$1],
371 [AC_SUBST([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
374 dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)
375 dnl Determine the suffix to use for integer constants of the given types.
376 dnl Define t_SUFFIX for each such type.
377 AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
379 dnl Use a shell loop, to avoid bloating configure, and
380 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
382 dnl - extra AC_SUBST calls, so that the right substitutions are made.
383 m4_foreach_w([gltype], [$1],
384 [AH_TEMPLATE(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
385 [Define to l, ll, u, ul, ull, etc., as suitable for
386 constants of type ']gltype['.])])
387 for gltype in $1 ; do
388 AC_CACHE_CHECK([for $gltype integer literal suffix],
389 [gl_cv_type_${gltype}_suffix],
390 [eval gl_cv_type_${gltype}_suffix=no
391 eval result=\$gl_cv_type_${gltype}_signed
392 if test "$result" = yes; then
397 for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
400 l) gltype1='long int';;
401 ll) gltype1='long long int';;
402 i64) gltype1='__int64';;
403 u) gltype1='unsigned int';;
404 ul) gltype1='unsigned long int';;
405 ull) gltype1='unsigned long long int';;
406 ui64)gltype1='unsigned __int64';;
409 [AC_LANG_PROGRAM([$2[
411 extern $gltype1 foo;]])],
412 [eval gl_cv_type_${gltype}_suffix=\$glsuf])
413 eval result=\$gl_cv_type_${gltype}_suffix
414 test "$result" != no && break
416 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
417 eval result=\$gl_cv_type_${gltype}_suffix
418 test "$result" = no && result=
419 eval ${GLTYPE}_SUFFIX=\$result
420 AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], [$result])
422 m4_foreach_w([gltype], [$1],
423 [AC_SUBST(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
426 dnl gl_STDINT_INCLUDES
427 AC_DEFUN([gl_STDINT_INCLUDES],
429 /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
430 included before <wchar.h>. */
440 dnl gl_STDINT_TYPE_PROPERTIES
441 dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
442 dnl of interest to stdint.in.h.
443 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
445 AC_REQUIRE([gl_MULTIARCH])
446 if test $APPLE_UNIVERSAL_BUILD = 0; then
447 gl_STDINT_BITSIZEOF([ptrdiff_t size_t],
448 [gl_STDINT_INCLUDES])
450 gl_STDINT_BITSIZEOF([sig_atomic_t wchar_t wint_t],
451 [gl_STDINT_INCLUDES])
452 gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
453 [gl_STDINT_INCLUDES])
454 gl_cv_type_ptrdiff_t_signed=yes
455 gl_cv_type_size_t_signed=no
456 if test $APPLE_UNIVERSAL_BUILD = 0; then
457 gl_INTEGER_TYPE_SUFFIX([ptrdiff_t size_t],
458 [gl_STDINT_INCLUDES])
460 gl_INTEGER_TYPE_SUFFIX([sig_atomic_t wchar_t wint_t],
461 [gl_STDINT_INCLUDES])
464 dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
465 dnl Remove this when we can assume autoconf >= 2.61.
466 m4_ifdef([AC_COMPUTE_INT], [], [
467 AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
472 # indent-tabs-mode: nil