1# stdint.m4 serial 41 2dnl Copyright (C) 2001-2011 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_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] 81gl_STDINT_INCLUDES 82[ 83#ifdef INT8_MAX 84int8_t a1 = INT8_MAX; 85int8_t a1min = INT8_MIN; 86#endif 87#ifdef INT16_MAX 88int16_t a2 = INT16_MAX; 89int16_t a2min = INT16_MIN; 90#endif 91#ifdef INT32_MAX 92int32_t a3 = INT32_MAX; 93int32_t a3min = INT32_MIN; 94#endif 95#ifdef INT64_MAX 96int64_t a4 = INT64_MAX; 97int64_t a4min = INT64_MIN; 98#endif 99#ifdef UINT8_MAX 100uint8_t b1 = UINT8_MAX; 101#else 102typedef int b1[(unsigned char) -1 != 255 ? 1 : -1]; 103#endif 104#ifdef UINT16_MAX 105uint16_t b2 = UINT16_MAX; 106#endif 107#ifdef UINT32_MAX 108uint32_t b3 = UINT32_MAX; 109#endif 110#ifdef UINT64_MAX 111uint64_t b4 = UINT64_MAX; 112#endif 113int_least8_t c1 = INT8_C (0x7f); 114int_least8_t c1max = INT_LEAST8_MAX; 115int_least8_t c1min = INT_LEAST8_MIN; 116int_least16_t c2 = INT16_C (0x7fff); 117int_least16_t c2max = INT_LEAST16_MAX; 118int_least16_t c2min = INT_LEAST16_MIN; 119int_least32_t c3 = INT32_C (0x7fffffff); 120int_least32_t c3max = INT_LEAST32_MAX; 121int_least32_t c3min = INT_LEAST32_MIN; 122int_least64_t c4 = INT64_C (0x7fffffffffffffff); 123int_least64_t c4max = INT_LEAST64_MAX; 124int_least64_t c4min = INT_LEAST64_MIN; 125uint_least8_t d1 = UINT8_C (0xff); 126uint_least8_t d1max = UINT_LEAST8_MAX; 127uint_least16_t d2 = UINT16_C (0xffff); 128uint_least16_t d2max = UINT_LEAST16_MAX; 129uint_least32_t d3 = UINT32_C (0xffffffff); 130uint_least32_t d3max = UINT_LEAST32_MAX; 131uint_least64_t d4 = UINT64_C (0xffffffffffffffff); 132uint_least64_t d4max = UINT_LEAST64_MAX; 133int_fast8_t e1 = INT_FAST8_MAX; 134int_fast8_t e1min = INT_FAST8_MIN; 135int_fast16_t e2 = INT_FAST16_MAX; 136int_fast16_t e2min = INT_FAST16_MIN; 137int_fast32_t e3 = INT_FAST32_MAX; 138int_fast32_t e3min = INT_FAST32_MIN; 139int_fast64_t e4 = INT_FAST64_MAX; 140int_fast64_t e4min = INT_FAST64_MIN; 141uint_fast8_t f1 = UINT_FAST8_MAX; 142uint_fast16_t f2 = UINT_FAST16_MAX; 143uint_fast32_t f3 = UINT_FAST32_MAX; 144uint_fast64_t f4 = UINT_FAST64_MAX; 145#ifdef INTPTR_MAX 146intptr_t g = INTPTR_MAX; 147intptr_t gmin = INTPTR_MIN; 148#endif 149#ifdef UINTPTR_MAX 150uintptr_t h = UINTPTR_MAX; 151#endif 152intmax_t i = INTMAX_MAX; 153uintmax_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))) 162struct 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] 227gl_STDINT_INCLUDES 228[ 229#include <stdio.h> 230#include <string.h> 231#define MVAL(macro) MVAL1(macro) 232#define MVAL1(expression) #expression 233static 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 311dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES) 312dnl Determine the size of each of the given types in bits. 313AC_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 348dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES) 349dnl Determine the signedness of each of the given types. 350dnl Define HAVE_SIGNED_TYPE if type is signed. 351AC_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 381dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES) 382dnl Determine the suffix to use for integer constants of the given types. 383dnl Define t_SUFFIX for each such type. 384AC_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 433dnl gl_STDINT_INCLUDES 434AC_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 447dnl gl_STDINT_TYPE_PROPERTIES 448dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t 449dnl of interest to stdint.in.h. 450AC_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 471dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in. 472dnl Remove this when we can assume autoconf >= 2.61. 473m4_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: 481