1# stdint.m4 serial 34 2dnl Copyright (C) 2001-2009 Free Software Foundation, Inc. 3dnl This file is free software; the Free Software Foundation 4dnl gives unlimited permission to copy and/or distribute it, 5dnl with or without modifications, as long as this notice is preserved. 6 7dnl From Paul Eggert and Bruno Haible. 8dnl Test whether <stdint.h> is supported or must be substituted. 9 10AC_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] 72gl_STDINT_INCLUDES 73[ 74#ifdef INT8_MAX 75int8_t a1 = INT8_MAX; 76int8_t a1min = INT8_MIN; 77#endif 78#ifdef INT16_MAX 79int16_t a2 = INT16_MAX; 80int16_t a2min = INT16_MIN; 81#endif 82#ifdef INT32_MAX 83int32_t a3 = INT32_MAX; 84int32_t a3min = INT32_MIN; 85#endif 86#ifdef INT64_MAX 87int64_t a4 = INT64_MAX; 88int64_t a4min = INT64_MIN; 89#endif 90#ifdef UINT8_MAX 91uint8_t b1 = UINT8_MAX; 92#else 93typedef int b1[(unsigned char) -1 != 255 ? 1 : -1]; 94#endif 95#ifdef UINT16_MAX 96uint16_t b2 = UINT16_MAX; 97#endif 98#ifdef UINT32_MAX 99uint32_t b3 = UINT32_MAX; 100#endif 101#ifdef UINT64_MAX 102uint64_t b4 = UINT64_MAX; 103#endif 104int_least8_t c1 = INT8_C (0x7f); 105int_least8_t c1max = INT_LEAST8_MAX; 106int_least8_t c1min = INT_LEAST8_MIN; 107int_least16_t c2 = INT16_C (0x7fff); 108int_least16_t c2max = INT_LEAST16_MAX; 109int_least16_t c2min = INT_LEAST16_MIN; 110int_least32_t c3 = INT32_C (0x7fffffff); 111int_least32_t c3max = INT_LEAST32_MAX; 112int_least32_t c3min = INT_LEAST32_MIN; 113int_least64_t c4 = INT64_C (0x7fffffffffffffff); 114int_least64_t c4max = INT_LEAST64_MAX; 115int_least64_t c4min = INT_LEAST64_MIN; 116uint_least8_t d1 = UINT8_C (0xff); 117uint_least8_t d1max = UINT_LEAST8_MAX; 118uint_least16_t d2 = UINT16_C (0xffff); 119uint_least16_t d2max = UINT_LEAST16_MAX; 120uint_least32_t d3 = UINT32_C (0xffffffff); 121uint_least32_t d3max = UINT_LEAST32_MAX; 122uint_least64_t d4 = UINT64_C (0xffffffffffffffff); 123uint_least64_t d4max = UINT_LEAST64_MAX; 124int_fast8_t e1 = INT_FAST8_MAX; 125int_fast8_t e1min = INT_FAST8_MIN; 126int_fast16_t e2 = INT_FAST16_MAX; 127int_fast16_t e2min = INT_FAST16_MIN; 128int_fast32_t e3 = INT_FAST32_MAX; 129int_fast32_t e3min = INT_FAST32_MIN; 130int_fast64_t e4 = INT_FAST64_MAX; 131int_fast64_t e4min = INT_FAST64_MIN; 132uint_fast8_t f1 = UINT_FAST8_MAX; 133uint_fast16_t f2 = UINT_FAST16_MAX; 134uint_fast32_t f3 = UINT_FAST32_MAX; 135uint_fast64_t f4 = UINT_FAST64_MAX; 136#ifdef INTPTR_MAX 137intptr_t g = INTPTR_MAX; 138intptr_t gmin = INTPTR_MIN; 139#endif 140#ifdef UINTPTR_MAX 141uintptr_t h = UINTPTR_MAX; 142#endif 143intmax_t i = INTMAX_MAX; 144uintmax_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)))) 151struct 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 [dnl Determine whether the various *_MIN, *_MAX macros are usable 205 dnl in preprocessor expression. We could do it by compiling a test 206 dnl program for each of these macros. It is faster to run a program 207 dnl that inspects the macro expansion. 208 dnl This detects a bug on HP-UX 11.23/ia64. 209 AC_RUN_IFELSE([ 210 AC_LANG_PROGRAM([[ 211#define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */ 212#define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */ 213#define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */ 214#include <stdint.h> 215] 216gl_STDINT_INCLUDES 217[ 218#include <stdio.h> 219#include <string.h> 220#define MVAL(macro) MVAL1(macro) 221#define MVAL1(expression) #expression 222static const char *macro_values[] = 223 { 224#ifdef INT8_MAX 225 MVAL (INT8_MAX), 226#endif 227#ifdef INT16_MAX 228 MVAL (INT16_MAX), 229#endif 230#ifdef INT32_MAX 231 MVAL (INT32_MAX), 232#endif 233#ifdef INT64_MAX 234 MVAL (INT64_MAX), 235#endif 236#ifdef UINT8_MAX 237 MVAL (UINT8_MAX), 238#endif 239#ifdef UINT16_MAX 240 MVAL (UINT16_MAX), 241#endif 242#ifdef UINT32_MAX 243 MVAL (UINT32_MAX), 244#endif 245#ifdef UINT64_MAX 246 MVAL (UINT64_MAX), 247#endif 248 NULL 249 }; 250]], [[ 251 const char **mv; 252 for (mv = macro_values; *mv != NULL; mv++) 253 { 254 const char *value = *mv; 255 /* Test whether it looks like a cast expression. */ 256 if (strncmp (value, "((unsigned int)"/*)*/, 15) == 0 257 || strncmp (value, "((unsigned short)"/*)*/, 17) == 0 258 || strncmp (value, "((unsigned char)"/*)*/, 16) == 0 259 || strncmp (value, "((int)"/*)*/, 6) == 0 260 || strncmp (value, "((signed short)"/*)*/, 15) == 0 261 || strncmp (value, "((signed char)"/*)*/, 14) == 0) 262 return 1; 263 } 264 return 0; 265]])], 266 [gl_cv_header_working_stdint_h=yes], 267 [], 268 [dnl When cross-compiling, assume it works. 269 gl_cv_header_working_stdint_h=yes 270 ]) 271 ]) 272 ]) 273 fi 274 if test "$gl_cv_header_working_stdint_h" = yes; then 275 STDINT_H= 276 else 277 dnl Check for <sys/inttypes.h>, and for 278 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5). 279 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h]) 280 if test $ac_cv_header_sys_inttypes_h = yes; then 281 HAVE_SYS_INTTYPES_H=1 282 else 283 HAVE_SYS_INTTYPES_H=0 284 fi 285 AC_SUBST([HAVE_SYS_INTTYPES_H]) 286 if test $ac_cv_header_sys_bitypes_h = yes; then 287 HAVE_SYS_BITYPES_H=1 288 else 289 HAVE_SYS_BITYPES_H=0 290 fi 291 AC_SUBST([HAVE_SYS_BITYPES_H]) 292 293 dnl Check for <wchar.h> (missing in Linux uClibc when built without wide 294 dnl character support). 295 AC_CHECK_HEADERS_ONCE([wchar.h]) 296 297 gl_STDINT_TYPE_PROPERTIES 298 STDINT_H=stdint.h 299 fi 300 AC_SUBST([STDINT_H]) 301]) 302 303dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES) 304dnl Determine the size of each of the given types in bits. 305AC_DEFUN([gl_STDINT_BITSIZEOF], 306[ 307 dnl Use a shell loop, to avoid bloating configure, and 308 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into 309 dnl config.h.in, 310 dnl - extra AC_SUBST calls, so that the right substitutions are made. 311 m4_foreach_w([gltype], [$1], 312 [AH_TEMPLATE([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]), 313 [Define to the number of bits in type ']gltype['.])]) 314 for gltype in $1 ; do 315 AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}], 316 [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT], 317 [$2 318#include <limits.h>], [result=unknown]) 319 eval gl_cv_bitsizeof_${gltype}=\$result 320 ]) 321 eval result=\$gl_cv_bitsizeof_${gltype} 322 if test $result = unknown; then 323 dnl Use a nonempty default, because some compilers, such as IRIX 5 cc, 324 dnl do a syntax check even on unused #if conditions and give an error 325 dnl on valid C code like this: 326 dnl #if 0 327 dnl # if > 32 328 dnl # endif 329 dnl #endif 330 result=0 331 fi 332 GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'` 333 AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result]) 334 eval BITSIZEOF_${GLTYPE}=\$result 335 done 336 m4_foreach_w([gltype], [$1], 337 [AC_SUBST([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))]) 338]) 339 340dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES) 341dnl Determine the signedness of each of the given types. 342dnl Define HAVE_SIGNED_TYPE if type is signed. 343AC_DEFUN([gl_CHECK_TYPES_SIGNED], 344[ 345 dnl Use a shell loop, to avoid bloating configure, and 346 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into 347 dnl config.h.in, 348 dnl - extra AC_SUBST calls, so that the right substitutions are made. 349 m4_foreach_w([gltype], [$1], 350 [AH_TEMPLATE([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]), 351 [Define to 1 if ']gltype[' is a signed integer type.])]) 352 for gltype in $1 ; do 353 AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed], 354 [AC_COMPILE_IFELSE( 355 [AC_LANG_PROGRAM([$2[ 356 int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])], 357 result=yes, result=no) 358 eval gl_cv_type_${gltype}_signed=\$result 359 ]) 360 eval result=\$gl_cv_type_${gltype}_signed 361 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'` 362 if test "$result" = yes; then 363 AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], [1]) 364 eval HAVE_SIGNED_${GLTYPE}=1 365 else 366 eval HAVE_SIGNED_${GLTYPE}=0 367 fi 368 done 369 m4_foreach_w([gltype], [$1], 370 [AC_SUBST([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))]) 371]) 372 373dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES) 374dnl Determine the suffix to use for integer constants of the given types. 375dnl Define t_SUFFIX for each such type. 376AC_DEFUN([gl_INTEGER_TYPE_SUFFIX], 377[ 378 dnl Use a shell loop, to avoid bloating configure, and 379 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into 380 dnl config.h.in, 381 dnl - extra AC_SUBST calls, so that the right substitutions are made. 382 m4_foreach_w([gltype], [$1], 383 [AH_TEMPLATE(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX], 384 [Define to l, ll, u, ul, ull, etc., as suitable for 385 constants of type ']gltype['.])]) 386 for gltype in $1 ; do 387 AC_CACHE_CHECK([for $gltype integer literal suffix], 388 [gl_cv_type_${gltype}_suffix], 389 [eval gl_cv_type_${gltype}_suffix=no 390 eval result=\$gl_cv_type_${gltype}_signed 391 if test "$result" = yes; then 392 glsufu= 393 else 394 glsufu=u 395 fi 396 for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do 397 case $glsuf in 398 '') gltype1='int';; 399 l) gltype1='long int';; 400 ll) gltype1='long long int';; 401 i64) gltype1='__int64';; 402 u) gltype1='unsigned int';; 403 ul) gltype1='unsigned long int';; 404 ull) gltype1='unsigned long long int';; 405 ui64)gltype1='unsigned __int64';; 406 esac 407 AC_COMPILE_IFELSE( 408 [AC_LANG_PROGRAM([$2[ 409 extern $gltype foo; 410 extern $gltype1 foo;]])], 411 [eval gl_cv_type_${gltype}_suffix=\$glsuf]) 412 eval result=\$gl_cv_type_${gltype}_suffix 413 test "$result" != no && break 414 done]) 415 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'` 416 eval result=\$gl_cv_type_${gltype}_suffix 417 test "$result" = no && result= 418 eval ${GLTYPE}_SUFFIX=\$result 419 AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], [$result]) 420 done 421 m4_foreach_w([gltype], [$1], 422 [AC_SUBST(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])]) 423]) 424 425dnl gl_STDINT_INCLUDES 426AC_DEFUN([gl_STDINT_INCLUDES], 427[[ 428 /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be 429 included before <wchar.h>. */ 430 #include <stddef.h> 431 #include <signal.h> 432 #if HAVE_WCHAR_H 433 # include <stdio.h> 434 # include <time.h> 435 # include <wchar.h> 436 #endif 437]]) 438 439dnl gl_STDINT_TYPE_PROPERTIES 440dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t 441dnl of interest to stdint.in.h. 442AC_DEFUN([gl_STDINT_TYPE_PROPERTIES], 443[ 444 AC_REQUIRE([gl_MULTIARCH]) 445 if test $APPLE_UNIVERSAL_BUILD = 0; then 446 gl_STDINT_BITSIZEOF([ptrdiff_t size_t], 447 [gl_STDINT_INCLUDES]) 448 fi 449 gl_STDINT_BITSIZEOF([sig_atomic_t wchar_t wint_t], 450 [gl_STDINT_INCLUDES]) 451 gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t], 452 [gl_STDINT_INCLUDES]) 453 gl_cv_type_ptrdiff_t_signed=yes 454 gl_cv_type_size_t_signed=no 455 if test $APPLE_UNIVERSAL_BUILD = 0; then 456 gl_INTEGER_TYPE_SUFFIX([ptrdiff_t size_t], 457 [gl_STDINT_INCLUDES]) 458 fi 459 gl_INTEGER_TYPE_SUFFIX([sig_atomic_t wchar_t wint_t], 460 [gl_STDINT_INCLUDES]) 461]) 462 463dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in. 464dnl Remove this when we can assume autoconf >= 2.61. 465m4_ifdef([AC_COMPUTE_INT], [], [ 466 AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])]) 467]) 468 469# Hey Emacs! 470# Local Variables: 471# indent-tabs-mode: nil 472# End: 473