2 dnl Copyright (C) 2001-2002, 2004-2007 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 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_stdint_h.
49 if test $ac_cv_header_stdint_h = yes; then
50 gl_ABSOLUTE_HEADER([stdint.h])
51 ABSOLUTE_STDINT_H=\"$gl_cv_absolute_stdint_h\"
54 ABSOLUTE_STDINT_H=\"no/such/file/stdint.h\"
57 AC_SUBST([ABSOLUTE_STDINT_H])
58 AC_SUBST([HAVE_STDINT_H])
60 dnl Now see whether we need a substitute <stdint.h>. Use
61 dnl ABSOLUTE_STDINT_H, not <stdint.h>, so that it also works during
62 dnl a "config.status --recheck" if a stdint.h has been
63 dnl created in the build directory.
64 if test $ac_cv_header_stdint_h = yes; then
65 AC_CACHE_CHECK([whether stdint.h conforms to C99],
66 [gl_cv_header_working_stdint_h],
67 [gl_cv_header_working_stdint_h=no
69 AC_LANG_PROGRAM([gl_STDINT_INCLUDES
71 #define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */
72 #define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */
73 #include ABSOLUTE_STDINT_H
76 int8_t a1min = INT8_MIN;
79 int16_t a2 = INT16_MAX;
80 int16_t a2min = INT16_MIN;
83 int32_t a3 = INT32_MAX;
84 int32_t a3min = INT32_MIN;
87 int64_t a4 = INT64_MAX;
88 int64_t a4min = INT64_MIN;
91 uint8_t b1 = UINT8_MAX;
93 typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];
96 uint16_t b2 = UINT16_MAX;
99 uint32_t b3 = UINT32_MAX;
102 uint64_t b4 = UINT64_MAX;
104 int_least8_t c1 = INT8_C (0x7f);
105 int_least8_t c1max = INT_LEAST8_MAX;
106 int_least8_t c1min = INT_LEAST8_MIN;
107 int_least16_t c2 = INT16_C (0x7fff);
108 int_least16_t c2max = INT_LEAST16_MAX;
109 int_least16_t c2min = INT_LEAST16_MIN;
110 int_least32_t c3 = INT32_C (0x7fffffff);
111 int_least32_t c3max = INT_LEAST32_MAX;
112 int_least32_t c3min = INT_LEAST32_MIN;
113 int_least64_t c4 = INT64_C (0x7fffffffffffffff);
114 int_least64_t c4max = INT_LEAST64_MAX;
115 int_least64_t c4min = INT_LEAST64_MIN;
116 uint_least8_t d1 = UINT8_C (0xff);
117 uint_least8_t d1max = UINT_LEAST8_MAX;
118 uint_least16_t d2 = UINT16_C (0xffff);
119 uint_least16_t d2max = UINT_LEAST16_MAX;
120 uint_least32_t d3 = UINT32_C (0xffffffff);
121 uint_least32_t d3max = UINT_LEAST32_MAX;
122 uint_least64_t d4 = UINT64_C (0xffffffffffffffff);
123 uint_least64_t d4max = UINT_LEAST64_MAX;
124 int_fast8_t e1 = INT_FAST8_MAX;
125 int_fast8_t e1min = INT_FAST8_MIN;
126 int_fast16_t e2 = INT_FAST16_MAX;
127 int_fast16_t e2min = INT_FAST16_MIN;
128 int_fast32_t e3 = INT_FAST32_MAX;
129 int_fast32_t e3min = INT_FAST32_MIN;
130 int_fast64_t e4 = INT_FAST64_MAX;
131 int_fast64_t e4min = INT_FAST64_MIN;
132 uint_fast8_t f1 = UINT_FAST8_MAX;
133 uint_fast16_t f2 = UINT_FAST16_MAX;
134 uint_fast32_t f3 = UINT_FAST32_MAX;
135 uint_fast64_t f4 = UINT_FAST64_MAX;
137 intptr_t g = INTPTR_MAX;
138 intptr_t gmin = INTPTR_MIN;
141 uintptr_t h = UINTPTR_MAX;
143 intmax_t i = INTMAX_MAX;
144 uintmax_t j = UINTMAX_MAX;
146 int check_PTRDIFF: PTRDIFF_MIN < (ptrdiff_t) 0 && (ptrdiff_t) 0 < PTRDIFF_MAX ? 1 : -1;
147 int check_SIG_ATOMIC: SIG_ATOMIC_MIN <= (sig_atomic_t) 0 && (sig_atomic_t) 0 < SIG_ATOMIC_MAX ? 1 : -1;
148 int check_SIZE: (size_t) 0 < SIZE_MAX ? 1 : -1;
149 int check_WCHAR: WCHAR_MIN <= (wchar_t) 0 && (wchar_t) 0 < WCHAR_MAX ? 1 : -1;
150 int check_WINT: WINT_MIN <= (wint_t) 0 && (wint_t) 0 < WINT_MAX ? 1 : -1;
152 /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */
154 (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
156 (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
158 /* Detect bugs in OpenBSD 3.9 stdint.h. */
160 int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
163 int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
166 int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
169 int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
171 int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
172 int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
173 int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
174 int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
175 int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
176 int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
177 int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
178 int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
179 int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
180 int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
181 int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
184 [gl_cv_header_working_stdint_h=yes])])
186 if test "$gl_cv_header_working_stdint_h" = yes; then
189 dnl Check for <sys/inttypes.h>, and for
190 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
191 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
192 if test $ac_cv_header_sys_inttypes_h = yes; then
193 HAVE_SYS_INTTYPES_H=1
195 HAVE_SYS_INTTYPES_H=0
197 AC_SUBST([HAVE_SYS_INTTYPES_H])
198 if test $ac_cv_header_sys_bitypes_h = yes; then
203 AC_SUBST([HAVE_SYS_BITYPES_H])
205 gl_STDINT_TYPE_PROPERTIES
211 dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
212 dnl Determine the size of each of the given types in bits.
213 AC_DEFUN([gl_STDINT_BITSIZEOF],
215 dnl Use a shell loop, to avoid bloating configure, and
216 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
218 dnl - extra AC_SUBST calls, so that the right substitutions are made.
219 AC_FOREACH([gltype], [$1],
220 [AH_TEMPLATE([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
221 [Define to the number of bits in type ']gltype['.])])
222 for gltype in $1 ; do
223 AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],
224 [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT],
226 #include <limits.h>], [result=unknown])
227 eval gl_cv_bitsizeof_${gltype}=\$result
229 eval result=\$gl_cv_bitsizeof_${gltype}
230 if test $result = unknown; then
231 dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,
232 dnl do a syntax check even on unused #if conditions and give an error
233 dnl on valid C code like this:
240 GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
241 AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
242 eval BITSIZEOF_${GLTYPE}=\$result
244 AC_FOREACH([gltype], [$1],
245 [AC_SUBST([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
248 dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)
249 dnl Determine the signedness of each of the given types.
250 dnl Define HAVE_SIGNED_TYPE if type is signed.
251 AC_DEFUN([gl_CHECK_TYPES_SIGNED],
253 dnl Use a shell loop, to avoid bloating configure, and
254 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
256 dnl - extra AC_SUBST calls, so that the right substitutions are made.
257 AC_FOREACH([gltype], [$1],
258 [AH_TEMPLATE([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
259 [Define to 1 if ']gltype[' is a signed integer type.])])
260 for gltype in $1 ; do
261 AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],
263 [AC_LANG_PROGRAM([$2[
264 int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],
265 result=yes, result=no)
266 eval gl_cv_type_${gltype}_signed=\$result
268 eval result=\$gl_cv_type_${gltype}_signed
269 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
270 if test "$result" = yes; then
271 AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], 1)
272 eval HAVE_SIGNED_${GLTYPE}=1
274 eval HAVE_SIGNED_${GLTYPE}=0
277 AC_FOREACH([gltype], [$1],
278 [AC_SUBST([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
281 dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)
282 dnl Determine the suffix to use for integer constants of the given types.
283 dnl Define t_SUFFIX for each such type.
284 AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
286 dnl Use a shell loop, to avoid bloating configure, and
287 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
289 dnl - extra AC_SUBST calls, so that the right substitutions are made.
290 AC_FOREACH([gltype], [$1],
291 [AH_TEMPLATE(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
292 [Define to l, ll, u, ul, ull, etc., as suitable for
293 constants of type ']gltype['.])])
294 for gltype in $1 ; do
295 AC_CACHE_CHECK([for $gltype integer literal suffix],
296 [gl_cv_type_${gltype}_suffix],
297 [eval gl_cv_type_${gltype}_suffix=no
298 eval result=\$gl_cv_type_${gltype}_signed
299 if test "$result" = yes; then
304 for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
307 l) gltype1='long int';;
308 ll) gltype1='long long int';;
309 i64) gltype1='__int64';;
310 u) gltype1='unsigned int';;
311 ul) gltype1='unsigned long int';;
312 ull) gltype1='unsigned long long int';;
313 ui64)gltype1='unsigned __int64';;
318 extern $gltype1 foo;])],
319 [eval gl_cv_type_${gltype}_suffix=\$glsuf])
320 eval result=\$gl_cv_type_${gltype}_suffix
321 test "$result" != no && break
323 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
324 eval result=\$gl_cv_type_${gltype}_suffix
325 test "$result" = no && result=
326 eval ${GLTYPE}_SUFFIX=\$result
327 AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], $result)
329 AC_FOREACH([gltype], [$1],
330 [AC_SUBST(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
333 dnl gl_STDINT_INCLUDES
334 AC_DEFUN([gl_STDINT_INCLUDES],
336 /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
337 included before <wchar.h>. */
345 dnl gl_STDINT_TYPE_PROPERTIES
346 dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
347 dnl of interest to stdint_.h.
348 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
350 gl_STDINT_BITSIZEOF([ptrdiff_t sig_atomic_t size_t wchar_t wint_t],
351 [gl_STDINT_INCLUDES])
352 gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
353 [gl_STDINT_INCLUDES])
354 gl_cv_type_ptrdiff_t_signed=yes
355 gl_cv_type_size_t_signed=no
356 gl_INTEGER_TYPE_SUFFIX([ptrdiff_t sig_atomic_t size_t wchar_t wint_t],
357 [gl_STDINT_INCLUDES])
360 dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
361 dnl Remove this when we can assume autoconf >= 2.61.
362 m4_ifdef([AC_COMPUTE_INT], [], [
363 AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
368 # indent-tabs-mode: nil