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1 | # stdint.m4 serial 29 |
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. | |
6 | ||
7 | dnl From Paul Eggert and Bruno Haible. | |
8 | dnl Test whether <stdint.h> is supported or must be substituted. | |
9 | ||
10 | AC_DEFUN([gl_STDINT_H], | |
11 | [ | |
12 | AC_PREREQ(2.59)dnl | |
13 | ||
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 | |
17 | HAVE_LONG_LONG_INT=1 | |
18 | else | |
19 | HAVE_LONG_LONG_INT=0 | |
20 | fi | |
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 | |
25 | else | |
26 | HAVE_UNSIGNED_LONG_LONG_INT=0 | |
27 | fi | |
28 | AC_SUBST([HAVE_UNSIGNED_LONG_LONG_INT]) | |
29 | ||
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 | |
33 | HAVE_INTTYPES_H=1 | |
34 | else | |
35 | HAVE_INTTYPES_H=0 | |
36 | fi | |
37 | AC_SUBST([HAVE_INTTYPES_H]) | |
38 | ||
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 | |
42 | HAVE_SYS_TYPES_H=1 | |
43 | else | |
44 | HAVE_SYS_TYPES_H=0 | |
45 | fi | |
46 | AC_SUBST([HAVE_SYS_TYPES_H]) | |
47 | ||
48 | gl_CHECK_NEXT_HEADERS([stdint.h]) | |
49 | if test $ac_cv_header_stdint_h = yes; then | |
50 | HAVE_STDINT_H=1 | |
51 | else | |
52 | HAVE_STDINT_H=0 | |
53 | fi | |
54 | AC_SUBST([HAVE_STDINT_H]) | |
55 | ||
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 | |
61 | AC_COMPILE_IFELSE([ | |
62 | AC_LANG_PROGRAM([[ | |
63 | #define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */ | |
64 | #define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */ | |
65 | #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */ | |
66 | #include <stdint.h> | |
67 | /* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>. */ | |
68 | #if !(defined WCHAR_MIN && defined WCHAR_MAX) | |
69 | #error "WCHAR_MIN, WCHAR_MAX not defined in <stdint.h>" | |
70 | #endif | |
71 | ] | |
72 | gl_STDINT_INCLUDES | |
73 | [ | |
74 | #ifdef INT8_MAX | |
75 | int8_t a1 = INT8_MAX; | |
76 | int8_t a1min = INT8_MIN; | |
77 | #endif | |
78 | #ifdef INT16_MAX | |
79 | int16_t a2 = INT16_MAX; | |
80 | int16_t a2min = INT16_MIN; | |
81 | #endif | |
82 | #ifdef INT32_MAX | |
83 | int32_t a3 = INT32_MAX; | |
84 | int32_t a3min = INT32_MIN; | |
85 | #endif | |
86 | #ifdef INT64_MAX | |
87 | int64_t a4 = INT64_MAX; | |
88 | int64_t a4min = INT64_MIN; | |
89 | #endif | |
90 | #ifdef UINT8_MAX | |
91 | uint8_t b1 = UINT8_MAX; | |
92 | #else | |
93 | typedef int b1[(unsigned char) -1 != 255 ? 1 : -1]; | |
94 | #endif | |
95 | #ifdef UINT16_MAX | |
96 | uint16_t b2 = UINT16_MAX; | |
97 | #endif | |
98 | #ifdef UINT32_MAX | |
99 | uint32_t b3 = UINT32_MAX; | |
100 | #endif | |
101 | #ifdef UINT64_MAX | |
102 | uint64_t b4 = UINT64_MAX; | |
103 | #endif | |
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; | |
136 | #ifdef INTPTR_MAX | |
137 | intptr_t g = INTPTR_MAX; | |
138 | intptr_t gmin = INTPTR_MIN; | |
139 | #endif | |
140 | #ifdef UINTPTR_MAX | |
141 | uintptr_t h = UINTPTR_MAX; | |
142 | #endif | |
143 | intmax_t i = INTMAX_MAX; | |
144 | uintmax_t j = UINTMAX_MAX; | |
145 | ||
146 | #include <limits.h> /* for CHAR_BIT */ | |
147 | #define TYPE_MINIMUM(t) \ | |
148 | ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ (t) 0 << (sizeof (t) * CHAR_BIT - 1))) | |
149 | #define TYPE_MAXIMUM(t) \ | |
150 | ((t) ((t) 0 < (t) -1 ? (t) -1 : ~ (~ (t) 0 << (sizeof (t) * CHAR_BIT - 1)))) | |
151 | struct s { | |
152 | int check_PTRDIFF: | |
153 | PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t) | |
154 | && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t) | |
155 | ? 1 : -1; | |
156 | /* Detect bug in FreeBSD 6.0 / ia64. */ | |
157 | int check_SIG_ATOMIC: | |
158 | SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t) | |
159 | && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t) | |
160 | ? 1 : -1; | |
161 | int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1; | |
162 | int check_WCHAR: | |
163 | WCHAR_MIN == TYPE_MINIMUM (wchar_t) | |
164 | && WCHAR_MAX == TYPE_MAXIMUM (wchar_t) | |
165 | ? 1 : -1; | |
166 | /* Detect bug in mingw. */ | |
167 | int check_WINT: | |
168 | WINT_MIN == TYPE_MINIMUM (wint_t) | |
169 | && WINT_MAX == TYPE_MAXIMUM (wint_t) | |
170 | ? 1 : -1; | |
171 | ||
172 | /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */ | |
173 | int check_UINT8_C: | |
174 | (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1; | |
175 | int check_UINT16_C: | |
176 | (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1; | |
177 | ||
178 | /* Detect bugs in OpenBSD 3.9 stdint.h. */ | |
179 | #ifdef UINT8_MAX | |
180 | int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1; | |
181 | #endif | |
182 | #ifdef UINT16_MAX | |
183 | int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1; | |
184 | #endif | |
185 | #ifdef UINT32_MAX | |
186 | int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1; | |
187 | #endif | |
188 | #ifdef UINT64_MAX | |
189 | int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1; | |
190 | #endif | |
191 | int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1; | |
192 | int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1; | |
193 | int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1; | |
194 | int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1; | |
195 | int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1; | |
196 | int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1; | |
197 | int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1; | |
198 | int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1; | |
199 | int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1; | |
200 | int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1; | |
201 | int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1; | |
202 | }; | |
203 | ]])], | |
204 | [gl_cv_header_working_stdint_h=yes])]) | |
205 | fi | |
206 | if test "$gl_cv_header_working_stdint_h" = yes; then | |
207 | STDINT_H= | |
208 | else | |
209 | dnl Check for <sys/inttypes.h>, and for | |
210 | dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5). | |
211 | AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h]) | |
212 | if test $ac_cv_header_sys_inttypes_h = yes; then | |
213 | HAVE_SYS_INTTYPES_H=1 | |
214 | else | |
215 | HAVE_SYS_INTTYPES_H=0 | |
216 | fi | |
217 | AC_SUBST([HAVE_SYS_INTTYPES_H]) | |
218 | if test $ac_cv_header_sys_bitypes_h = yes; then | |
219 | HAVE_SYS_BITYPES_H=1 | |
220 | else | |
221 | HAVE_SYS_BITYPES_H=0 | |
222 | fi | |
223 | AC_SUBST([HAVE_SYS_BITYPES_H]) | |
224 | ||
225 | dnl Check for <wchar.h> (missing in Linux uClibc when built without wide | |
226 | dnl character support). | |
227 | AC_CHECK_HEADERS_ONCE([wchar.h]) | |
228 | ||
229 | gl_STDINT_TYPE_PROPERTIES | |
230 | STDINT_H=stdint.h | |
231 | fi | |
232 | AC_SUBST(STDINT_H) | |
233 | ]) | |
234 | ||
235 | dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES) | |
236 | dnl Determine the size of each of the given types in bits. | |
237 | AC_DEFUN([gl_STDINT_BITSIZEOF], | |
238 | [ | |
239 | dnl Use a shell loop, to avoid bloating configure, and | |
240 | dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into | |
241 | dnl config.h.in, | |
242 | dnl - extra AC_SUBST calls, so that the right substitutions are made. | |
243 | AC_FOREACH([gltype], [$1], | |
244 | [AH_TEMPLATE([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]), | |
245 | [Define to the number of bits in type ']gltype['.])]) | |
246 | for gltype in $1 ; do | |
247 | AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}], | |
248 | [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT], | |
249 | [$2 | |
250 | #include <limits.h>], [result=unknown]) | |
251 | eval gl_cv_bitsizeof_${gltype}=\$result | |
252 | ]) | |
253 | eval result=\$gl_cv_bitsizeof_${gltype} | |
254 | if test $result = unknown; then | |
255 | dnl Use a nonempty default, because some compilers, such as IRIX 5 cc, | |
256 | dnl do a syntax check even on unused #if conditions and give an error | |
257 | dnl on valid C code like this: | |
258 | dnl #if 0 | |
259 | dnl # if > 32 | |
260 | dnl # endif | |
261 | dnl #endif | |
262 | result=0 | |
263 | fi | |
264 | GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'` | |
265 | AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result]) | |
266 | eval BITSIZEOF_${GLTYPE}=\$result | |
267 | done | |
268 | AC_FOREACH([gltype], [$1], | |
269 | [AC_SUBST([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))]) | |
270 | ]) | |
271 | ||
272 | dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES) | |
273 | dnl Determine the signedness of each of the given types. | |
274 | dnl Define HAVE_SIGNED_TYPE if type is signed. | |
275 | AC_DEFUN([gl_CHECK_TYPES_SIGNED], | |
276 | [ | |
277 | dnl Use a shell loop, to avoid bloating configure, and | |
278 | dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into | |
279 | dnl config.h.in, | |
280 | dnl - extra AC_SUBST calls, so that the right substitutions are made. | |
281 | AC_FOREACH([gltype], [$1], | |
282 | [AH_TEMPLATE([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]), | |
283 | [Define to 1 if ']gltype[' is a signed integer type.])]) | |
284 | for gltype in $1 ; do | |
285 | AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed], | |
286 | [AC_COMPILE_IFELSE( | |
287 | [AC_LANG_PROGRAM([$2[ | |
288 | int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])], | |
289 | result=yes, result=no) | |
290 | eval gl_cv_type_${gltype}_signed=\$result | |
291 | ]) | |
292 | eval result=\$gl_cv_type_${gltype}_signed | |
293 | GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'` | |
294 | if test "$result" = yes; then | |
295 | AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], 1) | |
296 | eval HAVE_SIGNED_${GLTYPE}=1 | |
297 | else | |
298 | eval HAVE_SIGNED_${GLTYPE}=0 | |
299 | fi | |
300 | done | |
301 | AC_FOREACH([gltype], [$1], | |
302 | [AC_SUBST([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))]) | |
303 | ]) | |
304 | ||
305 | dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES) | |
306 | dnl Determine the suffix to use for integer constants of the given types. | |
307 | dnl Define t_SUFFIX for each such type. | |
308 | AC_DEFUN([gl_INTEGER_TYPE_SUFFIX], | |
309 | [ | |
310 | dnl Use a shell loop, to avoid bloating configure, and | |
311 | dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into | |
312 | dnl config.h.in, | |
313 | dnl - extra AC_SUBST calls, so that the right substitutions are made. | |
314 | AC_FOREACH([gltype], [$1], | |
315 | [AH_TEMPLATE(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX], | |
316 | [Define to l, ll, u, ul, ull, etc., as suitable for | |
317 | constants of type ']gltype['.])]) | |
318 | for gltype in $1 ; do | |
319 | AC_CACHE_CHECK([for $gltype integer literal suffix], | |
320 | [gl_cv_type_${gltype}_suffix], | |
321 | [eval gl_cv_type_${gltype}_suffix=no | |
322 | eval result=\$gl_cv_type_${gltype}_signed | |
323 | if test "$result" = yes; then | |
324 | glsufu= | |
325 | else | |
326 | glsufu=u | |
327 | fi | |
328 | for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do | |
329 | case $glsuf in | |
330 | '') gltype1='int';; | |
331 | l) gltype1='long int';; | |
332 | ll) gltype1='long long int';; | |
333 | i64) gltype1='__int64';; | |
334 | u) gltype1='unsigned int';; | |
335 | ul) gltype1='unsigned long int';; | |
336 | ull) gltype1='unsigned long long int';; | |
337 | ui64)gltype1='unsigned __int64';; | |
338 | esac | |
339 | AC_COMPILE_IFELSE( | |
340 | [AC_LANG_PROGRAM([$2 | |
341 | extern $gltype foo; | |
342 | extern $gltype1 foo;])], | |
343 | [eval gl_cv_type_${gltype}_suffix=\$glsuf]) | |
344 | eval result=\$gl_cv_type_${gltype}_suffix | |
345 | test "$result" != no && break | |
346 | done]) | |
347 | GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'` | |
348 | eval result=\$gl_cv_type_${gltype}_suffix | |
349 | test "$result" = no && result= | |
350 | eval ${GLTYPE}_SUFFIX=\$result | |
351 | AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], $result) | |
352 | done | |
353 | AC_FOREACH([gltype], [$1], | |
354 | [AC_SUBST(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])]) | |
355 | ]) | |
356 | ||
357 | dnl gl_STDINT_INCLUDES | |
358 | AC_DEFUN([gl_STDINT_INCLUDES], | |
359 | [[ | |
360 | /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be | |
361 | included before <wchar.h>. */ | |
362 | #include <stddef.h> | |
363 | #include <signal.h> | |
364 | #if HAVE_WCHAR_H | |
365 | # include <stdio.h> | |
366 | # include <time.h> | |
367 | # include <wchar.h> | |
368 | #endif | |
369 | ]]) | |
370 | ||
371 | dnl gl_STDINT_TYPE_PROPERTIES | |
372 | dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t | |
373 | dnl of interest to stdint.in.h. | |
374 | AC_DEFUN([gl_STDINT_TYPE_PROPERTIES], | |
375 | [ | |
376 | gl_STDINT_BITSIZEOF([ptrdiff_t sig_atomic_t size_t wchar_t wint_t], | |
377 | [gl_STDINT_INCLUDES]) | |
378 | gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t], | |
379 | [gl_STDINT_INCLUDES]) | |
380 | gl_cv_type_ptrdiff_t_signed=yes | |
381 | gl_cv_type_size_t_signed=no | |
382 | gl_INTEGER_TYPE_SUFFIX([ptrdiff_t sig_atomic_t size_t wchar_t wint_t], | |
383 | [gl_STDINT_INCLUDES]) | |
384 | ]) | |
385 | ||
386 | dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in. | |
387 | dnl Remove this when we can assume autoconf >= 2.61. | |
388 | m4_ifdef([AC_COMPUTE_INT], [], [ | |
389 | AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])]) | |
390 | ]) | |
391 | ||
392 | # Hey Emacs! | |
393 | # Local Variables: | |
394 | # indent-tabs-mode: nil | |
395 | # End: |