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.
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])
23 dnl Check for <wchar.h>.
24 AC_CHECK_HEADERS_ONCE([wchar.h])
25 if test $ac_cv_header_wchar_h = yes; then
30 AC_SUBST([HAVE_WCHAR_H])
32 dnl Check for <inttypes.h>.
33 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_inttypes_h.
34 if test $ac_cv_header_inttypes_h = yes; then
39 AC_SUBST([HAVE_INTTYPES_H])
41 dnl Check for <sys/types.h>.
42 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_sys_types_h.
43 if test $ac_cv_header_sys_types_h = yes; then
48 AC_SUBST([HAVE_SYS_TYPES_H])
50 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_stdint_h.
51 if test $ac_cv_header_stdint_h = yes; then
52 gl_ABSOLUTE_HEADER([stdint.h])
53 ABSOLUTE_STDINT_H="<$gl_cv_absolute_stdint_h>"
54 AC_SUBST([ABSOLUTE_STDINT_H])
59 AC_SUBST([HAVE_STDINT_H])
61 dnl Now see whether we need a substitute <stdint.h>. Use
62 dnl ABSOLUTE_STDINT_H, not <stdint.h>, so that it also works during
63 dnl a "config.status --recheck" if a stdint.h has been
64 dnl created in the build directory.
65 if test $ac_cv_header_stdint_h = yes; then
66 AC_CACHE_CHECK([whether stdint.h conforms to C99],
67 [gl_cv_header_working_stdint_h],
68 [gl_cv_header_working_stdint_h=no
72 #define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */
73 #include ABSOLUTE_STDINT_H
78 int16_t a2 = INT16_MAX;
81 int32_t a3 = INT32_MAX;
84 int64_t a4 = INT64_MAX;
87 uint8_t b1 = UINT8_MAX;
89 typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];
92 uint16_t b2 = UINT16_MAX;
95 uint32_t b3 = UINT32_MAX;
98 uint64_t b4 = UINT64_MAX;
100 int_least8_t c1 = INT8_C (0x7f);
101 int_least16_t c2 = INT16_C (0x7fff);
102 int_least32_t c3 = INT32_C (0x7fffffff);
103 int_least64_t c4 = INT64_C (0x7fffffffffffffff);
104 uint_least8_t d1 = UINT8_C (0xff);
105 uint_least16_t d2 = UINT16_C (0xffff);
106 uint_least32_t d3 = UINT32_C (0xffffffff);
107 uint_least64_t d4 = UINT64_C (0xffffffffffffffff);
108 int_fast8_t e1 = INT_FAST8_MAX;
109 int_fast16_t e2 = INT_FAST16_MAX;
110 int_fast32_t e3 = INT_FAST32_MAX;
111 int_fast64_t e4 = INT_FAST64_MAX;
112 uint_fast8_t f1 = UINT_FAST8_MAX;
113 uint_fast16_t f2 = UINT_FAST16_MAX;
114 uint_fast32_t f3 = UINT_FAST32_MAX;
115 uint_fast64_t f4 = UINT_FAST64_MAX;
117 intptr_t g = INTPTR_MAX;
120 uintptr_t h = UINTPTR_MAX;
122 intmax_t i = INTMAX_MAX;
123 uintmax_t j = UINTMAX_MAX;
125 int check_PTRDIFF: PTRDIFF_MIN < 0 && 0 < PTRDIFF_MAX ? 1 : -1;
126 int check_SIG_ATOMIC: SIG_ATOMIC_MIN <= 0 && 0 < SIG_ATOMIC_MAX ? 1 : -1;
127 int check_SIZE: 0 < SIZE_MAX ? 1 : -1;
128 int check_WCHAR: WCHAR_MIN <= 0 && 0 < WCHAR_MAX ? 1 : -1;
129 int check_WINT: WINT_MIN <= 0 && 0 < WINT_MAX ? 1 : -1;
131 /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */
133 (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
135 (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
137 /* Detect bugs in OpenBSD 3.9 stdint.h. */
139 int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
142 int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
145 int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
148 int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
150 int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
151 int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
152 int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
153 int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
154 int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
155 int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
156 int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
157 int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
158 int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
159 int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
160 int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
163 [gl_cv_header_working_stdint_h=yes])])
165 if test "$gl_cv_header_working_stdint_h" != yes; then
167 dnl Check for <sys/inttypes.h>, and for
168 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
169 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
170 if test $ac_cv_header_sys_inttypes_h = yes; then
171 HAVE_SYS_INTTYPES_H=1
173 HAVE_SYS_INTTYPES_H=0
175 AC_SUBST([HAVE_SYS_INTTYPES_H])
176 if test $ac_cv_header_sys_bitypes_h = yes; then
181 AC_SUBST([HAVE_SYS_BITYPES_H])
183 gl_STDINT_TYPE_PROPERTIES
189 dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
190 dnl Determine the size of each of the given types in bits.
191 AC_DEFUN([gl_STDINT_BITSIZEOF],
193 dnl Use a shell loop, to avoid bloating configure, and
194 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
196 dnl - extra AC_SUBST calls, so that the right substitutions are made.
197 AC_FOREACH([gltype], [$1],
198 [AH_TEMPLATE([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
199 [Define to the number of bits in type ']gltype['.])])
200 for gltype in $1 ; do
201 AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],
202 [_AC_COMPUTE_INT([sizeof ($gltype) * CHAR_BIT], result,
204 #include <limits.h>], [result=unknown])
205 eval gl_cv_bitsizeof_${gltype}=\$result
207 eval result=\$gl_cv_bitsizeof_${gltype}
208 if test $result = unknown; then
209 dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,
210 dnl do a syntax check even on unused #if conditions and give an error
211 dnl on valid C code like this:
218 GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
219 AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
220 eval BITSIZEOF_${GLTYPE}=\$result
222 AC_FOREACH([gltype], [$1],
223 [AC_SUBST([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
226 dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)
227 dnl Determine the signedness of each of the given types.
228 dnl Define HAVE_SIGNED_TYPE if type is signed.
229 AC_DEFUN([gl_CHECK_TYPES_SIGNED],
231 dnl Use a shell loop, to avoid bloating configure, and
232 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
234 dnl - extra AC_SUBST calls, so that the right substitutions are made.
235 AC_FOREACH([gltype], [$1],
236 [AH_TEMPLATE([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
237 [Define to 1 if ']gltype[' is a signed integer type.])])
238 for gltype in $1 ; do
239 AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],
241 [AC_LANG_PROGRAM([$2[
242 int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],
243 result=yes, result=no)
244 eval gl_cv_type_${gltype}_signed=\$result
246 eval result=\$gl_cv_type_${gltype}_signed
247 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
248 if test "$result" = yes; then
249 AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], 1)
250 eval HAVE_SIGNED_${GLTYPE}=1
252 eval HAVE_SIGNED_${GLTYPE}=0
255 AC_FOREACH([gltype], [$1],
256 [AC_SUBST([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
259 dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)
260 dnl Determine the suffix to use for integer constants of the given types.
261 dnl Define t_SUFFIX for each such type.
262 AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
264 dnl Use a shell loop, to avoid bloating configure, and
265 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
267 dnl - extra AC_SUBST calls, so that the right substitutions are made.
268 AC_FOREACH([gltype], [$1],
269 [AH_TEMPLATE(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
270 [Define to l, ll, u, ul, ull, etc., as suitable for
271 constants of type ']gltype['.])])
272 for gltype in $1 ; do
273 AC_CACHE_CHECK([for $gltype integer literal suffix],
274 [gl_cv_type_${gltype}_suffix],
275 [eval gl_cv_type_${gltype}_suffix=no
276 eval result=\$gl_cv_type_${gltype}_signed
277 if test "$result" = yes; then
282 for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
285 l) gltype1='long int';;
286 ll) gltype1='long long int';;
287 i64) gltype1='__int64';;
288 u) gltype1='unsigned int';;
289 ul) gltype1='unsigned long int';;
290 ull) gltype1='unsigned long long int';;
291 ui64)gltype1='unsigned __int64';;
296 extern $gltype1 foo;])],
297 [eval gl_cv_type_${gltype}_suffix=\$glsuf])
298 eval test \"\$gl_cv_type_${gltype}_suffix\" != no && break
300 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
301 eval result=\$gl_cv_type_${gltype}_suffix
302 test "$result" = no && result=
303 eval ${GLTYPE}_SUFFIX=\$result
304 AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], $result)
306 AC_FOREACH([gltype], [$1],
307 [AC_SUBST(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
310 dnl gl_STDINT_INCLUDES
311 AC_DEFUN([gl_STDINT_INCLUDES],
316 /* BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before
324 dnl gl_STDINT_TYPE_PROPERTIES
325 dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
326 dnl of interest to stdint_.h.
327 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
329 gl_STDINT_BITSIZEOF([ptrdiff_t sig_atomic_t size_t wchar_t wint_t],
330 [gl_STDINT_INCLUDES])
331 gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
332 [gl_STDINT_INCLUDES])
333 gl_cv_type_ptrdiff_t_signed=yes
334 gl_cv_type_size_t_signed=no
335 gl_INTEGER_TYPE_SUFFIX([ptrdiff_t sig_atomic_t size_t wchar_t wint_t],
336 [gl_STDINT_INCLUDES])