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1 office 1 # stdint.m4 serial 41
2 dnl Copyright (C) 2001-2011 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_ONCE([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 <wchar.h>, in the same way as gl_WCHAR_H does.
31 AC_CHECK_HEADERS_ONCE([wchar.h])
32 if test $ac_cv_header_wchar_h = yes; then
33 HAVE_WCHAR_H=1
34 else
35 HAVE_WCHAR_H=0
36 fi
37 AC_SUBST([HAVE_WCHAR_H])
38  
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
42 HAVE_INTTYPES_H=1
43 else
44 HAVE_INTTYPES_H=0
45 fi
46 AC_SUBST([HAVE_INTTYPES_H])
47  
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
51 HAVE_SYS_TYPES_H=1
52 else
53 HAVE_SYS_TYPES_H=0
54 fi
55 AC_SUBST([HAVE_SYS_TYPES_H])
56  
57 gl_CHECK_NEXT_HEADERS([stdint.h])
58 if test $ac_cv_header_stdint_h = yes; then
59 HAVE_STDINT_H=1
60 else
61 HAVE_STDINT_H=0
62 fi
63 AC_SUBST([HAVE_STDINT_H])
64  
65 dnl Now see whether we need a substitute <stdint.h>.
66 if test $ac_cv_header_stdint_h = yes; then
67 AC_CACHE_CHECK([whether stdint.h conforms to C99],
68 [gl_cv_header_working_stdint_h],
69 [gl_cv_header_working_stdint_h=no
70 AC_COMPILE_IFELSE([
71 AC_LANG_PROGRAM([[
72 #define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */
73 #define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */
74 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
75 #include <stdint.h>
76 /* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>. */
77 #if !(defined WCHAR_MIN && defined WCHAR_MAX)
78 #error "WCHAR_MIN, WCHAR_MAX not defined in <stdint.h>"
79 #endif
80 ]
81 gl_STDINT_INCLUDES
82 [
83 #ifdef INT8_MAX
84 int8_t a1 = INT8_MAX;
85 int8_t a1min = INT8_MIN;
86 #endif
87 #ifdef INT16_MAX
88 int16_t a2 = INT16_MAX;
89 int16_t a2min = INT16_MIN;
90 #endif
91 #ifdef INT32_MAX
92 int32_t a3 = INT32_MAX;
93 int32_t a3min = INT32_MIN;
94 #endif
95 #ifdef INT64_MAX
96 int64_t a4 = INT64_MAX;
97 int64_t a4min = INT64_MIN;
98 #endif
99 #ifdef UINT8_MAX
100 uint8_t b1 = UINT8_MAX;
101 #else
102 typedef int b1[(unsigned char) -1 != 255 ? 1 : -1];
103 #endif
104 #ifdef UINT16_MAX
105 uint16_t b2 = UINT16_MAX;
106 #endif
107 #ifdef UINT32_MAX
108 uint32_t b3 = UINT32_MAX;
109 #endif
110 #ifdef UINT64_MAX
111 uint64_t b4 = UINT64_MAX;
112 #endif
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;
145 #ifdef INTPTR_MAX
146 intptr_t g = INTPTR_MAX;
147 intptr_t gmin = INTPTR_MIN;
148 #endif
149 #ifdef UINTPTR_MAX
150 uintptr_t h = UINTPTR_MAX;
151 #endif
152 intmax_t i = INTMAX_MAX;
153 uintmax_t j = UINTMAX_MAX;
154  
155 #include <limits.h> /* for CHAR_BIT */
156 #define TYPE_MINIMUM(t) \
157 ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ TYPE_MAXIMUM (t)))
158 #define TYPE_MAXIMUM(t) \
159 ((t) ((t) 0 < (t) -1 \
160 ? (t) -1 \
161 : ((((t) 1 << (sizeof (t) * CHAR_BIT - 2)) - 1) * 2 + 1)))
162 struct s {
163 int check_PTRDIFF:
164 PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t)
165 && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t)
166 ? 1 : -1;
167 /* Detect bug in FreeBSD 6.0 / ia64. */
168 int check_SIG_ATOMIC:
169 SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t)
170 && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t)
171 ? 1 : -1;
172 int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1;
173 int check_WCHAR:
174 WCHAR_MIN == TYPE_MINIMUM (wchar_t)
175 && WCHAR_MAX == TYPE_MAXIMUM (wchar_t)
176 ? 1 : -1;
177 /* Detect bug in mingw. */
178 int check_WINT:
179 WINT_MIN == TYPE_MINIMUM (wint_t)
180 && WINT_MAX == TYPE_MAXIMUM (wint_t)
181 ? 1 : -1;
182  
183 /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */
184 int check_UINT8_C:
185 (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1;
186 int check_UINT16_C:
187 (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1;
188  
189 /* Detect bugs in OpenBSD 3.9 stdint.h. */
190 #ifdef UINT8_MAX
191 int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1;
192 #endif
193 #ifdef UINT16_MAX
194 int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1;
195 #endif
196 #ifdef UINT32_MAX
197 int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1;
198 #endif
199 #ifdef UINT64_MAX
200 int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1;
201 #endif
202 int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1;
203 int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1;
204 int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1;
205 int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1;
206 int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1;
207 int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1;
208 int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1;
209 int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1;
210 int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1;
211 int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1;
212 int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1;
213 };
214 ]])],
215 [dnl Determine whether the various *_MIN, *_MAX macros are usable
216 dnl in preprocessor expression. We could do it by compiling a test
217 dnl program for each of these macros. It is faster to run a program
218 dnl that inspects the macro expansion.
219 dnl This detects a bug on HP-UX 11.23/ia64.
220 AC_RUN_IFELSE([
221 AC_LANG_PROGRAM([[
222 #define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */
223 #define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */
224 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */
225 #include <stdint.h>
226 ]
227 gl_STDINT_INCLUDES
228 [
229 #include <stdio.h>
230 #include <string.h>
231 #define MVAL(macro) MVAL1(macro)
232 #define MVAL1(expression) #expression
233 static const char *macro_values[] =
234 {
235 #ifdef INT8_MAX
236 MVAL (INT8_MAX),
237 #endif
238 #ifdef INT16_MAX
239 MVAL (INT16_MAX),
240 #endif
241 #ifdef INT32_MAX
242 MVAL (INT32_MAX),
243 #endif
244 #ifdef INT64_MAX
245 MVAL (INT64_MAX),
246 #endif
247 #ifdef UINT8_MAX
248 MVAL (UINT8_MAX),
249 #endif
250 #ifdef UINT16_MAX
251 MVAL (UINT16_MAX),
252 #endif
253 #ifdef UINT32_MAX
254 MVAL (UINT32_MAX),
255 #endif
256 #ifdef UINT64_MAX
257 MVAL (UINT64_MAX),
258 #endif
259 NULL
260 };
261 ]], [[
262 const char **mv;
263 for (mv = macro_values; *mv != NULL; mv++)
264 {
265 const char *value = *mv;
266 /* Test whether it looks like a cast expression. */
267 if (strncmp (value, "((unsigned int)"/*)*/, 15) == 0
268 || strncmp (value, "((unsigned short)"/*)*/, 17) == 0
269 || strncmp (value, "((unsigned char)"/*)*/, 16) == 0
270 || strncmp (value, "((int)"/*)*/, 6) == 0
271 || strncmp (value, "((signed short)"/*)*/, 15) == 0
272 || strncmp (value, "((signed char)"/*)*/, 14) == 0)
273 return mv - macro_values + 1;
274 }
275 return 0;
276 ]])],
277 [gl_cv_header_working_stdint_h=yes],
278 [],
279 [dnl When cross-compiling, assume it works.
280 gl_cv_header_working_stdint_h=yes
281 ])
282 ])
283 ])
284 fi
285 if test "$gl_cv_header_working_stdint_h" = yes; then
286 STDINT_H=
287 else
288 dnl Check for <sys/inttypes.h>, and for
289 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5).
290 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h])
291 if test $ac_cv_header_sys_inttypes_h = yes; then
292 HAVE_SYS_INTTYPES_H=1
293 else
294 HAVE_SYS_INTTYPES_H=0
295 fi
296 AC_SUBST([HAVE_SYS_INTTYPES_H])
297 if test $ac_cv_header_sys_bitypes_h = yes; then
298 HAVE_SYS_BITYPES_H=1
299 else
300 HAVE_SYS_BITYPES_H=0
301 fi
302 AC_SUBST([HAVE_SYS_BITYPES_H])
303  
304 gl_STDINT_TYPE_PROPERTIES
305 STDINT_H=stdint.h
306 fi
307 AC_SUBST([STDINT_H])
308 AM_CONDITIONAL([GL_GENERATE_STDINT_H], [test -n "$STDINT_H"])
309 ])
310  
311 dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES)
312 dnl Determine the size of each of the given types in bits.
313 AC_DEFUN([gl_STDINT_BITSIZEOF],
314 [
315 dnl Use a shell loop, to avoid bloating configure, and
316 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
317 dnl config.h.in,
318 dnl - extra AC_SUBST calls, so that the right substitutions are made.
319 m4_foreach_w([gltype], [$1],
320 [AH_TEMPLATE([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
321 [Define to the number of bits in type ']gltype['.])])
322 for gltype in $1 ; do
323 AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}],
324 [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT],
325 [$2
326 #include <limits.h>], [result=unknown])
327 eval gl_cv_bitsizeof_${gltype}=\$result
328 ])
329 eval result=\$gl_cv_bitsizeof_${gltype}
330 if test $result = unknown; then
331 dnl Use a nonempty default, because some compilers, such as IRIX 5 cc,
332 dnl do a syntax check even on unused #if conditions and give an error
333 dnl on valid C code like this:
334 dnl #if 0
335 dnl # if > 32
336 dnl # endif
337 dnl #endif
338 result=0
339 fi
340 GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
341 AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result])
342 eval BITSIZEOF_${GLTYPE}=\$result
343 done
344 m4_foreach_w([gltype], [$1],
345 [AC_SUBST([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
346 ])
347  
348 dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES)
349 dnl Determine the signedness of each of the given types.
350 dnl Define HAVE_SIGNED_TYPE if type is signed.
351 AC_DEFUN([gl_CHECK_TYPES_SIGNED],
352 [
353 dnl Use a shell loop, to avoid bloating configure, and
354 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
355 dnl config.h.in,
356 dnl - extra AC_SUBST calls, so that the right substitutions are made.
357 m4_foreach_w([gltype], [$1],
358 [AH_TEMPLATE([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]),
359 [Define to 1 if ']gltype[' is a signed integer type.])])
360 for gltype in $1 ; do
361 AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed],
362 [AC_COMPILE_IFELSE(
363 [AC_LANG_PROGRAM([$2[
364 int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])],
365 result=yes, result=no)
366 eval gl_cv_type_${gltype}_signed=\$result
367 ])
368 eval result=\$gl_cv_type_${gltype}_signed
369 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
370 if test "$result" = yes; then
371 AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], [1])
372 eval HAVE_SIGNED_${GLTYPE}=1
373 else
374 eval HAVE_SIGNED_${GLTYPE}=0
375 fi
376 done
377 m4_foreach_w([gltype], [$1],
378 [AC_SUBST([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))])
379 ])
380  
381 dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES)
382 dnl Determine the suffix to use for integer constants of the given types.
383 dnl Define t_SUFFIX for each such type.
384 AC_DEFUN([gl_INTEGER_TYPE_SUFFIX],
385 [
386 dnl Use a shell loop, to avoid bloating configure, and
387 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into
388 dnl config.h.in,
389 dnl - extra AC_SUBST calls, so that the right substitutions are made.
390 m4_foreach_w([gltype], [$1],
391 [AH_TEMPLATE(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX],
392 [Define to l, ll, u, ul, ull, etc., as suitable for
393 constants of type ']gltype['.])])
394 for gltype in $1 ; do
395 AC_CACHE_CHECK([for $gltype integer literal suffix],
396 [gl_cv_type_${gltype}_suffix],
397 [eval gl_cv_type_${gltype}_suffix=no
398 eval result=\$gl_cv_type_${gltype}_signed
399 if test "$result" = yes; then
400 glsufu=
401 else
402 glsufu=u
403 fi
404 for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do
405 case $glsuf in
406 '') gltype1='int';;
407 l) gltype1='long int';;
408 ll) gltype1='long long int';;
409 i64) gltype1='__int64';;
410 u) gltype1='unsigned int';;
411 ul) gltype1='unsigned long int';;
412 ull) gltype1='unsigned long long int';;
413 ui64)gltype1='unsigned __int64';;
414 esac
415 AC_COMPILE_IFELSE(
416 [AC_LANG_PROGRAM([$2[
417 extern $gltype foo;
418 extern $gltype1 foo;]])],
419 [eval gl_cv_type_${gltype}_suffix=\$glsuf])
420 eval result=\$gl_cv_type_${gltype}_suffix
421 test "$result" != no && break
422 done])
423 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'`
424 eval result=\$gl_cv_type_${gltype}_suffix
425 test "$result" = no && result=
426 eval ${GLTYPE}_SUFFIX=\$result
427 AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], [$result])
428 done
429 m4_foreach_w([gltype], [$1],
430 [AC_SUBST(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])])
431 ])
432  
433 dnl gl_STDINT_INCLUDES
434 AC_DEFUN([gl_STDINT_INCLUDES],
435 [[
436 /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be
437 included before <wchar.h>. */
438 #include <stddef.h>
439 #include <signal.h>
440 #if HAVE_WCHAR_H
441 # include <stdio.h>
442 # include <time.h>
443 # include <wchar.h>
444 #endif
445 ]])
446  
447 dnl gl_STDINT_TYPE_PROPERTIES
448 dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t
449 dnl of interest to stdint.in.h.
450 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES],
451 [
452 AC_REQUIRE([gl_MULTIARCH])
453 if test $APPLE_UNIVERSAL_BUILD = 0; then
454 gl_STDINT_BITSIZEOF([ptrdiff_t size_t],
455 [gl_STDINT_INCLUDES])
456 fi
457 gl_STDINT_BITSIZEOF([sig_atomic_t wchar_t wint_t],
458 [gl_STDINT_INCLUDES])
459 gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t],
460 [gl_STDINT_INCLUDES])
461 gl_cv_type_ptrdiff_t_signed=yes
462 gl_cv_type_size_t_signed=no
463 if test $APPLE_UNIVERSAL_BUILD = 0; then
464 gl_INTEGER_TYPE_SUFFIX([ptrdiff_t size_t],
465 [gl_STDINT_INCLUDES])
466 fi
467 gl_INTEGER_TYPE_SUFFIX([sig_atomic_t wchar_t wint_t],
468 [gl_STDINT_INCLUDES])
469 ])
470  
471 dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in.
472 dnl Remove this when we can assume autoconf >= 2.61.
473 m4_ifdef([AC_COMPUTE_INT], [], [
474 AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])])
475 ])
476  
477 # Hey Emacs!
478 # Local Variables:
479 # indent-tabs-mode: nil
480 # End: