2 dnl Copyright (C) 2001-2002, 2004-2006 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 <wchar.h>.
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 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_stdint_h.
58 if test $ac_cv_header_stdint_h = yes; then
59 gl_ABSOLUTE_HEADER([stdint.h])
60 ABSOLUTE_STDINT_H=\"$gl_cv_absolute_stdint_h\"
63 ABSOLUTE_STDINT_H=\"no/such/file/stdint.h\"
66 AC_SUBST([ABSOLUTE_STDINT_H])
67 AC_SUBST([HAVE_STDINT_H])
69 dnl Now see whether we need a substitute <stdint.h>. Use
70 dnl ABSOLUTE_STDINT_H, not <stdint.h>, so that it also works during
71 dnl a "config.status --recheck" if a stdint.h has been
72 dnl created in the build directory.
73 if test $ac_cv_header_stdint_h = yes; then
74 AC_CACHE_CHECK([whether stdint.h conforms to C99],
75 [gl_cv_header_working_stdint_h],
76 [gl_cv_header_working_stdint_h=no
80 #define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */
81 #define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */
82 #include ABSOLUTE_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 int check_PTRDIFF: PTRDIFF_MIN < 0 && 0 < PTRDIFF_MAX ? 1 : -1;
156 int check_SIG_ATOMIC: SIG_ATOMIC_MIN <= 0 && 0 < SIG_ATOMIC_MAX ? 1 : -1;
157 int check_SIZE: 0 < SIZE_MAX ? 1 : -1;
158 int check_WCHAR: WCHAR_MIN <= 0 && 0 < WCHAR_MAX ? 1 : -1;
159 int check_WINT: WINT_MIN <= 0 && 0 < WINT_MAX ? 1 : -1;
161 /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */
163 (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
165 (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
167 /* Detect bugs in OpenBSD 3.9 stdint.h. */
169 int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
172 int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
175 int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
178 int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
180 int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
181 int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
182 int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
183 int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
184 int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
185 int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
186 int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
187 int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
188 int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
189 int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
190 int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
193 [gl_cv_header_working_stdint_h=yes])])
195 if test "$gl_cv_header_working_stdint_h" = yes; then
198 dnl Check for <sys/inttypes.h>, and for
199 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
200 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
201 if test $ac_cv_header_sys_inttypes_h = yes; then
202 HAVE_SYS_INTTYPES_H=1
204 HAVE_SYS_INTTYPES_H=0
206 AC_SUBST([HAVE_SYS_INTTYPES_H])
207 if test $ac_cv_header_sys_bitypes_h = yes; then
212 AC_SUBST([HAVE_SYS_BITYPES_H])
214 gl_STDINT_TYPE_PROPERTIES
220 dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
221 dnl Determine the size of each of the given types in bits.
222 AC_DEFUN([gl_STDINT_BITSIZEOF],
224 dnl Use a shell loop, to avoid bloating configure, and
225 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
227 dnl - extra AC_SUBST calls, so that the right substitutions are made.
228 AC_FOREACH([gltype], [$1],
229 [AH_TEMPLATE([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
230 [Define to the number of bits in type ']gltype['.])])
231 for gltype in $1 ; do
232 AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],
233 [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT],
235 #include <limits.h>], [result=unknown])
236 eval gl_cv_bitsizeof_${gltype}=\$result
238 eval result=\$gl_cv_bitsizeof_${gltype}
239 if test $result = unknown; then
240 dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,
241 dnl do a syntax check even on unused #if conditions and give an error
242 dnl on valid C code like this:
249 GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
250 AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
251 eval BITSIZEOF_${GLTYPE}=\$result
253 AC_FOREACH([gltype], [$1],
254 [AC_SUBST([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
257 dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)
258 dnl Determine the signedness of each of the given types.
259 dnl Define HAVE_SIGNED_TYPE if type is signed.
260 AC_DEFUN([gl_CHECK_TYPES_SIGNED],
262 dnl Use a shell loop, to avoid bloating configure, and
263 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
265 dnl - extra AC_SUBST calls, so that the right substitutions are made.
266 AC_FOREACH([gltype], [$1],
267 [AH_TEMPLATE([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
268 [Define to 1 if ']gltype[' is a signed integer type.])])
269 for gltype in $1 ; do
270 AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],
272 [AC_LANG_PROGRAM([$2[
273 int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],
274 result=yes, result=no)
275 eval gl_cv_type_${gltype}_signed=\$result
277 eval result=\$gl_cv_type_${gltype}_signed
278 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
279 if test "$result" = yes; then
280 AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], 1)
281 eval HAVE_SIGNED_${GLTYPE}=1
283 eval HAVE_SIGNED_${GLTYPE}=0
286 AC_FOREACH([gltype], [$1],
287 [AC_SUBST([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
290 dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)
291 dnl Determine the suffix to use for integer constants of the given types.
292 dnl Define t_SUFFIX for each such type.
293 AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
295 dnl Use a shell loop, to avoid bloating configure, and
296 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
298 dnl - extra AC_SUBST calls, so that the right substitutions are made.
299 AC_FOREACH([gltype], [$1],
300 [AH_TEMPLATE(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
301 [Define to l, ll, u, ul, ull, etc., as suitable for
302 constants of type ']gltype['.])])
303 for gltype in $1 ; do
304 AC_CACHE_CHECK([for $gltype integer literal suffix],
305 [gl_cv_type_${gltype}_suffix],
306 [eval gl_cv_type_${gltype}_suffix=no
307 eval result=\$gl_cv_type_${gltype}_signed
308 if test "$result" = yes; then
313 for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
316 l) gltype1='long int';;
317 ll) gltype1='long long int';;
318 i64) gltype1='__int64';;
319 u) gltype1='unsigned int';;
320 ul) gltype1='unsigned long int';;
321 ull) gltype1='unsigned long long int';;
322 ui64)gltype1='unsigned __int64';;
327 extern $gltype1 foo;])],
328 [eval gl_cv_type_${gltype}_suffix=\$glsuf])
329 eval result=\$gl_cv_type_${gltype}_suffix
330 test "$result" != no && break
332 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
333 eval result=\$gl_cv_type_${gltype}_suffix
334 test "$result" = no && result=
335 eval ${GLTYPE}_SUFFIX=\$result
336 AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], $result)
338 AC_FOREACH([gltype], [$1],
339 [AC_SUBST(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
342 dnl gl_STDINT_INCLUDES
343 AC_DEFUN([gl_STDINT_INCLUDES],
348 /* BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
356 dnl gl_STDINT_TYPE_PROPERTIES
357 dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
358 dnl of interest to stdint_.h.
359 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
361 gl_STDINT_BITSIZEOF([ptrdiff_t sig_atomic_t size_t wchar_t wint_t],
362 [gl_STDINT_INCLUDES])
363 gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
364 [gl_STDINT_INCLUDES])
365 gl_cv_type_ptrdiff_t_signed=yes
366 gl_cv_type_size_t_signed=no
367 gl_INTEGER_TYPE_SUFFIX([ptrdiff_t sig_atomic_t size_t wchar_t wint_t],
368 [gl_STDINT_INCLUDES])
371 dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
372 dnl Remove this when we can assume autoconf >= 2.61.
373 m4_ifdef([AC_COMPUTE_INT], [], [
374 AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])