1# stdint.m4 serial 31 2dnl Copyright (C) 2001-2008 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 [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 235dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES) 236dnl Determine the size of each of the given types in bits. 237AC_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 m4_foreach_w([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 m4_foreach_w([gltype], [$1], 269 [AC_SUBST([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))]) 270]) 271 272dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES) 273dnl Determine the signedness of each of the given types. 274dnl Define HAVE_SIGNED_TYPE if type is signed. 275AC_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 m4_foreach_w([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 m4_foreach_w([gltype], [$1], 302 [AC_SUBST([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))]) 303]) 304 305dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES) 306dnl Determine the suffix to use for integer constants of the given types. 307dnl Define t_SUFFIX for each such type. 308AC_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 m4_foreach_w([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 m4_foreach_w([gltype], [$1], 354 [AC_SUBST(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])]) 355]) 356 357dnl gl_STDINT_INCLUDES 358AC_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 371dnl gl_STDINT_TYPE_PROPERTIES 372dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t 373dnl of interest to stdint.in.h. 374AC_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 386dnl Autoconf >= 2.61 has AC_COMPUTE_INT built-in. 387dnl Remove this when we can assume autoconf >= 2.61. 388m4_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: 396