1 # stdint.m4 serial 43 2 dnl Copyright (C) 2001-2012 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 _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */ 73 #include <stdint.h> 74 /* Dragonfly defines WCHAR_MIN, WCHAR_MAX only in <wchar.h>. */ 75 #if !(defined WCHAR_MIN && defined WCHAR_MAX) 76 #error "WCHAR_MIN, WCHAR_MAX not defined in <stdint.h>" 77 #endif 78 ] 79 gl_STDINT_INCLUDES 80 [ 81 #ifdef INT8_MAX 82 int8_t a1 = INT8_MAX; 83 int8_t a1min = INT8_MIN; 84 #endif 85 #ifdef INT16_MAX 86 int16_t a2 = INT16_MAX; 87 int16_t a2min = INT16_MIN; 88 #endif 89 #ifdef INT32_MAX 90 int32_t a3 = INT32_MAX; 91 int32_t a3min = INT32_MIN; 92 #endif 93 #ifdef INT64_MAX 94 int64_t a4 = INT64_MAX; 95 int64_t a4min = INT64_MIN; 96 #endif 97 #ifdef UINT8_MAX 98 uint8_t b1 = UINT8_MAX; 99 #else 100 typedef int b1[(unsigned char) -1 != 255 ? 1 : -1]; 101 #endif 102 #ifdef UINT16_MAX 103 uint16_t b2 = UINT16_MAX; 104 #endif 105 #ifdef UINT32_MAX 106 uint32_t b3 = UINT32_MAX; 107 #endif 108 #ifdef UINT64_MAX 109 uint64_t b4 = UINT64_MAX; 110 #endif 111 int_least8_t c1 = INT8_C (0x7f); 112 int_least8_t c1max = INT_LEAST8_MAX; 113 int_least8_t c1min = INT_LEAST8_MIN; 114 int_least16_t c2 = INT16_C (0x7fff); 115 int_least16_t c2max = INT_LEAST16_MAX; 116 int_least16_t c2min = INT_LEAST16_MIN; 117 int_least32_t c3 = INT32_C (0x7fffffff); 118 int_least32_t c3max = INT_LEAST32_MAX; 119 int_least32_t c3min = INT_LEAST32_MIN; 120 int_least64_t c4 = INT64_C (0x7fffffffffffffff); 121 int_least64_t c4max = INT_LEAST64_MAX; 122 int_least64_t c4min = INT_LEAST64_MIN; 123 uint_least8_t d1 = UINT8_C (0xff); 124 uint_least8_t d1max = UINT_LEAST8_MAX; 125 uint_least16_t d2 = UINT16_C (0xffff); 126 uint_least16_t d2max = UINT_LEAST16_MAX; 127 uint_least32_t d3 = UINT32_C (0xffffffff); 128 uint_least32_t d3max = UINT_LEAST32_MAX; 129 uint_least64_t d4 = UINT64_C (0xffffffffffffffff); 130 uint_least64_t d4max = UINT_LEAST64_MAX; 131 int_fast8_t e1 = INT_FAST8_MAX; 132 int_fast8_t e1min = INT_FAST8_MIN; 133 int_fast16_t e2 = INT_FAST16_MAX; 134 int_fast16_t e2min = INT_FAST16_MIN; 135 int_fast32_t e3 = INT_FAST32_MAX; 136 int_fast32_t e3min = INT_FAST32_MIN; 137 int_fast64_t e4 = INT_FAST64_MAX; 138 int_fast64_t e4min = INT_FAST64_MIN; 139 uint_fast8_t f1 = UINT_FAST8_MAX; 140 uint_fast16_t f2 = UINT_FAST16_MAX; 141 uint_fast32_t f3 = UINT_FAST32_MAX; 142 uint_fast64_t f4 = UINT_FAST64_MAX; 143 #ifdef INTPTR_MAX 144 intptr_t g = INTPTR_MAX; 145 intptr_t gmin = INTPTR_MIN; 146 #endif 147 #ifdef UINTPTR_MAX 148 uintptr_t h = UINTPTR_MAX; 149 #endif 150 intmax_t i = INTMAX_MAX; 151 uintmax_t j = UINTMAX_MAX; 152 153 #include <limits.h> /* for CHAR_BIT */ 154 #define TYPE_MINIMUM(t) \ 155 ((t) ((t) 0 < (t) -1 ? (t) 0 : ~ TYPE_MAXIMUM (t))) 156 #define TYPE_MAXIMUM(t) \ 157 ((t) ((t) 0 < (t) -1 \ 158 ? (t) -1 \ 159 : ((((t) 1 << (sizeof (t) * CHAR_BIT - 2)) - 1) * 2 + 1))) 160 struct s { 161 int check_PTRDIFF: 162 PTRDIFF_MIN == TYPE_MINIMUM (ptrdiff_t) 163 && PTRDIFF_MAX == TYPE_MAXIMUM (ptrdiff_t) 164 ? 1 : -1; 165 /* Detect bug in FreeBSD 6.0 / ia64. */ 166 int check_SIG_ATOMIC: 167 SIG_ATOMIC_MIN == TYPE_MINIMUM (sig_atomic_t) 168 && SIG_ATOMIC_MAX == TYPE_MAXIMUM (sig_atomic_t) 169 ? 1 : -1; 170 int check_SIZE: SIZE_MAX == TYPE_MAXIMUM (size_t) ? 1 : -1; 171 int check_WCHAR: 172 WCHAR_MIN == TYPE_MINIMUM (wchar_t) 173 && WCHAR_MAX == TYPE_MAXIMUM (wchar_t) 174 ? 1 : -1; 175 /* Detect bug in mingw. */ 176 int check_WINT: 177 WINT_MIN == TYPE_MINIMUM (wint_t) 178 && WINT_MAX == TYPE_MAXIMUM (wint_t) 179 ? 1 : -1; 180 181 /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */ 182 int check_UINT8_C: 183 (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1; 184 int check_UINT16_C: 185 (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1; 186 187 /* Detect bugs in OpenBSD 3.9 stdint.h. */ 188 #ifdef UINT8_MAX 189 int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1; 190 #endif 191 #ifdef UINT16_MAX 192 int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1; 193 #endif 194 #ifdef UINT32_MAX 195 int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1; 196 #endif 197 #ifdef UINT64_MAX 198 int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1; 199 #endif 200 int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1; 201 int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1; 202 int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1; 203 int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1; 204 int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1; 205 int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1; 206 int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1; 207 int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1; 208 int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1; 209 int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1; 210 int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1; 211 }; 212 ]])], 213 [dnl Determine whether the various *_MIN, *_MAX macros are usable 214 dnl in preprocessor expression. We could do it by compiling a test 215 dnl program for each of these macros. It is faster to run a program 216 dnl that inspects the macro expansion. 217 dnl This detects a bug on HP-UX 11.23/ia64. 218 AC_RUN_IFELSE([ 219 AC_LANG_PROGRAM([[ 220 #define _GL_JUST_INCLUDE_SYSTEM_STDINT_H 1 /* work if build isn't clean */ 221 #include <stdint.h> 222 ] 223 gl_STDINT_INCLUDES 224 [ 225 #include <stdio.h> 226 #include <string.h> 227 #define MVAL(macro) MVAL1(macro) 228 #define MVAL1(expression) #expression 229 static const char *macro_values[] = 230 { 231 #ifdef INT8_MAX 232 MVAL (INT8_MAX), 233 #endif 234 #ifdef INT16_MAX 235 MVAL (INT16_MAX), 236 #endif 237 #ifdef INT32_MAX 238 MVAL (INT32_MAX), 239 #endif 240 #ifdef INT64_MAX 241 MVAL (INT64_MAX), 242 #endif 243 #ifdef UINT8_MAX 244 MVAL (UINT8_MAX), 245 #endif 246 #ifdef UINT16_MAX 247 MVAL (UINT16_MAX), 248 #endif 249 #ifdef UINT32_MAX 250 MVAL (UINT32_MAX), 251 #endif 252 #ifdef UINT64_MAX 253 MVAL (UINT64_MAX), 254 #endif 255 NULL 256 }; 257 ]], [[ 258 const char **mv; 259 for (mv = macro_values; *mv != NULL; mv++) 260 { 261 const char *value = *mv; 262 /* Test whether it looks like a cast expression. */ 263 if (strncmp (value, "((unsigned int)"/*)*/, 15) == 0 264 || strncmp (value, "((unsigned short)"/*)*/, 17) == 0 265 || strncmp (value, "((unsigned char)"/*)*/, 16) == 0 266 || strncmp (value, "((int)"/*)*/, 6) == 0 267 || strncmp (value, "((signed short)"/*)*/, 15) == 0 268 || strncmp (value, "((signed char)"/*)*/, 14) == 0) 269 return mv - macro_values + 1; 270 } 271 return 0; 272 ]])], 273 [gl_cv_header_working_stdint_h=yes], 274 [], 275 [dnl When cross-compiling, assume it works. 276 gl_cv_header_working_stdint_h=yes 277 ]) 278 ]) 279 ]) 280 fi 281 if test "$gl_cv_header_working_stdint_h" = yes; then 282 STDINT_H= 283 else 284 dnl Check for <sys/inttypes.h>, and for 285 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5). 286 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h]) 287 if test $ac_cv_header_sys_inttypes_h = yes; then 288 HAVE_SYS_INTTYPES_H=1 289 else 290 HAVE_SYS_INTTYPES_H=0 291 fi 292 AC_SUBST([HAVE_SYS_INTTYPES_H]) 293 if test $ac_cv_header_sys_bitypes_h = yes; then 294 HAVE_SYS_BITYPES_H=1 295 else 296 HAVE_SYS_BITYPES_H=0 297 fi 298 AC_SUBST([HAVE_SYS_BITYPES_H]) 299 300 gl_STDINT_TYPE_PROPERTIES 301 STDINT_H=stdint.h 302 fi 303 AC_SUBST([STDINT_H]) 304 AM_CONDITIONAL([GL_GENERATE_STDINT_H], [test -n "$STDINT_H"]) 305 ]) 306 307 dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES) 308 dnl Determine the size of each of the given types in bits. 309 AC_DEFUN([gl_STDINT_BITSIZEOF], 310 [ 311 dnl Use a shell loop, to avoid bloating configure, and 312 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into 313 dnl config.h.in, 314 dnl - extra AC_SUBST calls, so that the right substitutions are made. 315 m4_foreach_w([gltype], [$1], 316 [AH_TEMPLATE([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]), 317 [Define to the number of bits in type ']gltype['.])]) 318 for gltype in $1 ; do 319 AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}], 320 [AC_COMPUTE_INT([result], [sizeof ($gltype) * CHAR_BIT], 321 [$2 322 #include <limits.h>], [result=unknown]) 323 eval gl_cv_bitsizeof_${gltype}=\$result 324 ]) 325 eval result=\$gl_cv_bitsizeof_${gltype} 326 if test $result = unknown; then 327 dnl Use a nonempty default, because some compilers, such as IRIX 5 cc, 328 dnl do a syntax check even on unused #if conditions and give an error 329 dnl on valid C code like this: 330 dnl #if 0 331 dnl # if > 32 332 dnl # endif 333 dnl #endif 334 result=0 335 fi 336 GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'` 337 AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result]) 338 eval BITSIZEOF_${GLTYPE}=\$result 339 done 340 m4_foreach_w([gltype], [$1], 341 [AC_SUBST([BITSIZEOF_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))]) 342 ]) 343 344 dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES) 345 dnl Determine the signedness of each of the given types. 346 dnl Define HAVE_SIGNED_TYPE if type is signed. 347 AC_DEFUN([gl_CHECK_TYPES_SIGNED], 348 [ 349 dnl Use a shell loop, to avoid bloating configure, and 350 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into 351 dnl config.h.in, 352 dnl - extra AC_SUBST calls, so that the right substitutions are made. 353 m4_foreach_w([gltype], [$1], 354 [AH_TEMPLATE([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]), 355 [Define to 1 if ']gltype[' is a signed integer type.])]) 356 for gltype in $1 ; do 357 AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed], 358 [AC_COMPILE_IFELSE( 359 [AC_LANG_PROGRAM([$2[ 360 int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])], 361 result=yes, result=no) 362 eval gl_cv_type_${gltype}_signed=\$result 363 ]) 364 eval result=\$gl_cv_type_${gltype}_signed 365 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'` 366 if test "$result" = yes; then 367 AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], [1]) 368 eval HAVE_SIGNED_${GLTYPE}=1 369 else 370 eval HAVE_SIGNED_${GLTYPE}=0 371 fi 372 done 373 m4_foreach_w([gltype], [$1], 374 [AC_SUBST([HAVE_SIGNED_]m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))]) 375 ]) 376 377 dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES) 378 dnl Determine the suffix to use for integer constants of the given types. 379 dnl Define t_SUFFIX for each such type. 380 AC_DEFUN([gl_INTEGER_TYPE_SUFFIX], 381 [ 382 dnl Use a shell loop, to avoid bloating configure, and 383 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into 384 dnl config.h.in, 385 dnl - extra AC_SUBST calls, so that the right substitutions are made. 386 m4_foreach_w([gltype], [$1], 387 [AH_TEMPLATE(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX], 388 [Define to l, ll, u, ul, ull, etc., as suitable for 389 constants of type ']gltype['.])]) 390 for gltype in $1 ; do 391 AC_CACHE_CHECK([for $gltype integer literal suffix], 392 [gl_cv_type_${gltype}_suffix], 393 [eval gl_cv_type_${gltype}_suffix=no 394 eval result=\$gl_cv_type_${gltype}_signed 395 if test "$result" = yes; then 396 glsufu= 397 else 398 glsufu=u 399 fi 400 for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do 401 case $glsuf in 402 '') gltype1='int';; 403 l) gltype1='long int';; 404 ll) gltype1='long long int';; 405 i64) gltype1='__int64';; 406 u) gltype1='unsigned int';; 407 ul) gltype1='unsigned long int';; 408 ull) gltype1='unsigned long long int';; 409 ui64)gltype1='unsigned __int64';; 410 esac 411 AC_COMPILE_IFELSE( 412 [AC_LANG_PROGRAM([$2[ 413 extern $gltype foo; 414 extern $gltype1 foo;]])], 415 [eval gl_cv_type_${gltype}_suffix=\$glsuf]) 416 eval result=\$gl_cv_type_${gltype}_suffix 417 test "$result" != no && break 418 done]) 419 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'` 420 eval result=\$gl_cv_type_${gltype}_suffix 421 test "$result" = no && result= 422 eval ${GLTYPE}_SUFFIX=\$result 423 AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], [$result]) 424 done 425 m4_foreach_w([gltype], [$1], 426 [AC_SUBST(m4_translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])]) 427 ]) 428 429 dnl gl_STDINT_INCLUDES 430 AC_DEFUN([gl_STDINT_INCLUDES], 431 [[ 432 /* BSD/OS 4.0.1 has a bug: <stddef.h>, <stdio.h> and <time.h> must be 433 included before <wchar.h>. */ 434 #include <stddef.h> 435 #include <signal.h> 436 #if HAVE_WCHAR_H 437 # include <stdio.h> 438 # include <time.h> 439 # include <wchar.h> 440 #endif 441 ]]) 442 443 dnl gl_STDINT_TYPE_PROPERTIES 444 dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t 445 dnl of interest to stdint.in.h. 446 AC_DEFUN([gl_STDINT_TYPE_PROPERTIES], 447 [ 448 AC_REQUIRE([gl_MULTIARCH]) 449 if test $APPLE_UNIVERSAL_BUILD = 0; then 450 gl_STDINT_BITSIZEOF([ptrdiff_t size_t], 451 [gl_STDINT_INCLUDES]) 452 fi 453 gl_STDINT_BITSIZEOF([sig_atomic_t wchar_t wint_t], 454 [gl_STDINT_INCLUDES]) 455 gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t], 456 [gl_STDINT_INCLUDES]) 457 gl_cv_type_ptrdiff_t_signed=yes 458 gl_cv_type_size_t_signed=no 459 if test $APPLE_UNIVERSAL_BUILD = 0; then 460 gl_INTEGER_TYPE_SUFFIX([ptrdiff_t size_t], 461 [gl_STDINT_INCLUDES]) 462 fi 463 gl_INTEGER_TYPE_SUFFIX([sig_atomic_t wchar_t wint_t], 464 [gl_STDINT_INCLUDES]) 465 466 dnl If wint_t is smaller than 'int', it cannot satisfy the ISO C 99 467 dnl requirement that wint_t is "unchanged by default argument promotions". 468 dnl In this case gnulib's <wchar.h> and <wctype.h> override wint_t. 469 dnl Set the variable BITSIZEOF_WINT_T accordingly. 470 if test $BITSIZEOF_WINT_T -lt 32; then 471 BITSIZEOF_WINT_T=32 472 fi 473 ]) 474 475 dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in. 476 dnl Remove this when we can assume autoconf >= 2.61. 477 m4_ifdef([AC_COMPUTE_INT], [], [ 478 AC_DEFUN([AC_COMPUTE_INT], [_AC_COMPUTE_INT([$2],[$1],[$3],[$4])]) 479 ]) 480 481 # Hey Emacs! 482 # Local Variables: 483 # indent-tabs-mode: nil 484 # End: 485
