2 dnl Copyright (C) 2001-2007 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([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 <inttypes.h>.
31 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_inttypes_h.
32 if test $ac_cv_header_inttypes_h = yes; then
37 AC_SUBST([HAVE_INTTYPES_H])
39 dnl Check for <sys/types.h>.
40 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_sys_types_h.
41 if test $ac_cv_header_sys_types_h = yes; then
46 AC_SUBST([HAVE_SYS_TYPES_H])
48 gl_CHECK_NEXT_HEADERS([stdint.h])
49 if test $ac_cv_header_stdint_h = yes; then
54 AC_SUBST([HAVE_STDINT_H])
56 dnl Now see whether we need a substitute <stdint.h>.
57 if test $ac_cv_header_stdint_h = yes; then
58 AC_CACHE_CHECK([whether stdint.h conforms to C99],
59 [gl_cv_header_working_stdint_h],
60 [gl_cv_header_working_stdint_h=no
62 AC_LANG_PROGRAM([gl_STDINT_INCLUDES
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 */
70 int8_t a1min = INT8_MIN;
73 int16_t a2 = INT16_MAX;
74 int16_t a2min = INT16_MIN;
77 int32_t a3 = INT32_MAX;
78 int32_t a3min = INT32_MIN;
81 int64_t a4 = INT64_MAX;
82 int64_t a4min = INT64_MIN;
85 uint8_t b1 = UINT8_MAX;
87 typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];
90 uint16_t b2 = UINT16_MAX;
93 uint32_t b3 = UINT32_MAX;
96 uint64_t b4 = UINT64_MAX;
98 int_least8_t c1 = INT8_C (0x7f);
99 int_least8_t c1max = INT_LEAST8_MAX;
100 int_least8_t c1min = INT_LEAST8_MIN;
101 int_least16_t c2 = INT16_C (0x7fff);
102 int_least16_t c2max = INT_LEAST16_MAX;
103 int_least16_t c2min = INT_LEAST16_MIN;
104 int_least32_t c3 = INT32_C (0x7fffffff);
105 int_least32_t c3max = INT_LEAST32_MAX;
106 int_least32_t c3min = INT_LEAST32_MIN;
107 int_least64_t c4 = INT64_C (0x7fffffffffffffff);
108 int_least64_t c4max = INT_LEAST64_MAX;
109 int_least64_t c4min = INT_LEAST64_MIN;
110 uint_least8_t d1 = UINT8_C (0xff);
111 uint_least8_t d1max = UINT_LEAST8_MAX;
112 uint_least16_t d2 = UINT16_C (0xffff);
113 uint_least16_t d2max = UINT_LEAST16_MAX;
114 uint_least32_t d3 = UINT32_C (0xffffffff);
115 uint_least32_t d3max = UINT_LEAST32_MAX;
116 uint_least64_t d4 = UINT64_C (0xffffffffffffffff);
117 uint_least64_t d4max = UINT_LEAST64_MAX;
118 int_fast8_t e1 = INT_FAST8_MAX;
119 int_fast8_t e1min = INT_FAST8_MIN;
120 int_fast16_t e2 = INT_FAST16_MAX;
121 int_fast16_t e2min = INT_FAST16_MIN;
122 int_fast32_t e3 = INT_FAST32_MAX;
123 int_fast32_t e3min = INT_FAST32_MIN;
124 int_fast64_t e4 = INT_FAST64_MAX;
125 int_fast64_t e4min = INT_FAST64_MIN;
126 uint_fast8_t f1 = UINT_FAST8_MAX;
127 uint_fast16_t f2 = UINT_FAST16_MAX;
128 uint_fast32_t f3 = UINT_FAST32_MAX;
129 uint_fast64_t f4 = UINT_FAST64_MAX;
131 intptr_t g = INTPTR_MAX;
132 intptr_t gmin = INTPTR_MIN;
135 uintptr_t h = UINTPTR_MAX;
137 intmax_t i = INTMAX_MAX;
138 uintmax_t j = UINTMAX_MAX;
140 #include <limits.h> /* for CHAR_BIT */
141 #define TYPE_MINIMUM(t) \
142 ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1)))
143 #define TYPE_MAXIMUM(t) \
144 ((t) ((t) 0 < (t) -1 ? (t) -1 : ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))))
147 PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t)
148 && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t)
150 /* Detect bug in FreeBSD 6.0 / ia64. */
151 int check_SIG_ATOMIC:
152 SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t)
153 && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t)
155 int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1;
157 WCHAR_MIN == TYPE_MINIMUM (wchar_t)
158 && WCHAR_MAX == TYPE_MAXIMUM (wchar_t)
160 /* Detect bug in mingw. */
162 WINT_MIN == TYPE_MINIMUM (wint_t)
163 && WINT_MAX == TYPE_MAXIMUM (wint_t)
166 /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */
168 (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
170 (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
172 /* Detect bugs in OpenBSD 3.9 stdint.h. */
174 int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
177 int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
180 int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
183 int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
185 int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
186 int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
187 int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
188 int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
189 int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
190 int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
191 int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
192 int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
193 int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
194 int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
195 int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
198 [gl_cv_header_working_stdint_h=yes])])
200 if test "$gl_cv_header_working_stdint_h" = yes; then
203 dnl Check for <sys/inttypes.h>, and for
204 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
205 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
206 if test $ac_cv_header_sys_inttypes_h = yes; then
207 HAVE_SYS_INTTYPES_H=1
209 HAVE_SYS_INTTYPES_H=0
211 AC_SUBST([HAVE_SYS_INTTYPES_H])
212 if test $ac_cv_header_sys_bitypes_h = yes; then
217 AC_SUBST([HAVE_SYS_BITYPES_H])
219 dnl Check for <wchar.h> (missing in Linux uClibc when built without wide
220 dnl character support).
221 AC_CHECK_HEADERS_ONCE([wchar.h])
223 gl_STDINT_TYPE_PROPERTIES
229 dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
230 dnl Determine the size of each of the given types in bits.
231 AC_DEFUN([gl_STDINT_BITSIZEOF],
233 dnl Use a shell loop, to avoid bloating configure, and
234 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
236 dnl - extra AC_SUBST calls, so that the right substitutions are made.
237 AC_FOREACH([gltype], [$1],
238 [AH_TEMPLATE([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
239 [Define to the number of bits in type ']gltype['.])])
240 for gltype in $1 ; do
241 AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],
242 [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT],
244 #include <limits.h>], [result=unknown])
245 eval gl_cv_bitsizeof_${gltype}=\$result
247 eval result=\$gl_cv_bitsizeof_${gltype}
248 if test $result = unknown; then
249 dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,
250 dnl do a syntax check even on unused #if conditions and give an error
251 dnl on valid C code like this:
258 GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
259 AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
260 eval BITSIZEOF_${GLTYPE}=\$result
262 AC_FOREACH([gltype], [$1],
263 [AC_SUBST([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
266 dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)
267 dnl Determine the signedness of each of the given types.
268 dnl Define HAVE_SIGNED_TYPE if type is signed.
269 AC_DEFUN([gl_CHECK_TYPES_SIGNED],
271 dnl Use a shell loop, to avoid bloating configure, and
272 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
274 dnl - extra AC_SUBST calls, so that the right substitutions are made.
275 AC_FOREACH([gltype], [$1],
276 [AH_TEMPLATE([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
277 [Define to 1 if ']gltype[' is a signed integer type.])])
278 for gltype in $1 ; do
279 AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],
281 [AC_LANG_PROGRAM([$2[
282 int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],
283 result=yes, result=no)
284 eval gl_cv_type_${gltype}_signed=\$result
286 eval result=\$gl_cv_type_${gltype}_signed
287 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
288 if test "$result" = yes; then
289 AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], 1)
290 eval HAVE_SIGNED_${GLTYPE}=1
292 eval HAVE_SIGNED_${GLTYPE}=0
295 AC_FOREACH([gltype], [$1],
296 [AC_SUBST([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
299 dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)
300 dnl Determine the suffix to use for integer constants of the given types.
301 dnl Define t_SUFFIX for each such type.
302 AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
304 dnl Use a shell loop, to avoid bloating configure, and
305 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
307 dnl - extra AC_SUBST calls, so that the right substitutions are made.
308 AC_FOREACH([gltype], [$1],
309 [AH_TEMPLATE(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
310 [Define to l, ll, u, ul, ull, etc., as suitable for
311 constants of type ']gltype['.])])
312 for gltype in $1 ; do
313 AC_CACHE_CHECK([for $gltype integer literal suffix],
314 [gl_cv_type_${gltype}_suffix],
315 [eval gl_cv_type_${gltype}_suffix=no
316 eval result=\$gl_cv_type_${gltype}_signed
317 if test "$result" = yes; then
322 for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
325 l) gltype1='long int';;
326 ll) gltype1='long long int';;
327 i64) gltype1='__int64';;
328 u) gltype1='unsigned int';;
329 ul) gltype1='unsigned long int';;
330 ull) gltype1='unsigned long long int';;
331 ui64)gltype1='unsigned __int64';;
336 extern $gltype1 foo;])],
337 [eval gl_cv_type_${gltype}_suffix=\$glsuf])
338 eval result=\$gl_cv_type_${gltype}_suffix
339 test "$result" != no && break
341 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
342 eval result=\$gl_cv_type_${gltype}_suffix
343 test "$result" = no && result=
344 eval ${GLTYPE}_SUFFIX=\$result
345 AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], $result)
347 AC_FOREACH([gltype], [$1],
348 [AC_SUBST(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
351 dnl gl_STDINT_INCLUDES
352 AC_DEFUN([gl_STDINT_INCLUDES],
354 /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
355 included before <wchar.h>. */
365 dnl gl_STDINT_TYPE_PROPERTIES
366 dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
367 dnl of interest to stdint_.h.
368 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
370 gl_STDINT_BITSIZEOF([ptrdiff_t sig_atomic_t size_t wchar_t wint_t],
371 [gl_STDINT_INCLUDES])
372 gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
373 [gl_STDINT_INCLUDES])
374 gl_cv_type_ptrdiff_t_signed=yes
375 gl_cv_type_size_t_signed=no
376 gl_INTEGER_TYPE_SUFFIX([ptrdiff_t sig_atomic_t size_t wchar_t wint_t],
377 [gl_STDINT_INCLUDES])
380 dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
381 dnl Remove this when we can assume autoconf >= 2.61.
382 m4_ifdef([AC_COMPUTE_INT], [], [
383 AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
388 # indent-tabs-mode: nil