1# stdint.m4 serial 19 2dnl Copyright (C) 2001-2002, 2004-2006 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 <wchar.h>. 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 dnl AC_INCLUDES_DEFAULT defines $ac_cv_header_stdint_h. 58 if test $ac_cv_header_stdint_h = yes; then 59 gl_ABSOLUTE_HEADER([stdint.h]) 60 ABSOLUTE_STDINT_H=\"$gl_cv_absolute_stdint_h\" 61 HAVE_STDINT_H=1 62 else 63 ABSOLUTE_STDINT_H=\"no/such/file/stdint.h\" 64 HAVE_STDINT_H=0 65 fi 66 AC_SUBST([ABSOLUTE_STDINT_H]) 67 AC_SUBST([HAVE_STDINT_H]) 68 69 dnl Now see whether we need a substitute <stdint.h>. Use 70 dnl ABSOLUTE_STDINT_H, not <stdint.h>, so that it also works during 71 dnl a "config.status --recheck" if a stdint.h has been 72 dnl created in the build directory. 73 if test $ac_cv_header_stdint_h = yes; then 74 AC_CACHE_CHECK([whether stdint.h conforms to C99], 75 [gl_cv_header_working_stdint_h], 76 [gl_cv_header_working_stdint_h=no 77 AC_COMPILE_IFELSE([ 78 AC_LANG_PROGRAM([[ 79#include <stddef.h> 80#define __STDC_LIMIT_MACROS 1 /* to make it work also in C++ mode */ 81#define __STDC_CONSTANT_MACROS 1 /* to make it work also in C++ mode */ 82#include ABSOLUTE_STDINT_H 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; 154struct s { 155 int check_PTRDIFF: PTRDIFF_MIN < 0 && 0 < PTRDIFF_MAX ? 1 : -1; 156 int check_SIG_ATOMIC: SIG_ATOMIC_MIN <= 0 && 0 < SIG_ATOMIC_MAX ? 1 : -1; 157 int check_SIZE: 0 < SIZE_MAX ? 1 : -1; 158 int check_WCHAR: WCHAR_MIN <= 0 && 0 < WCHAR_MAX ? 1 : -1; 159 int check_WINT: WINT_MIN <= 0 && 0 < WINT_MAX ? 1 : -1; 160 161 /* Detect bugs in glibc 2.4 and Solaris 10 stdint.h, among others. */ 162 int check_UINT8_C: 163 (-1 < UINT8_C (0)) == (-1 < (uint_least8_t) 0) ? 1 : -1; 164 int check_UINT16_C: 165 (-1 < UINT16_C (0)) == (-1 < (uint_least16_t) 0) ? 1 : -1; 166 167 /* Detect bugs in OpenBSD 3.9 stdint.h. */ 168#ifdef UINT8_MAX 169 int check_uint8: (uint8_t) -1 == UINT8_MAX ? 1 : -1; 170#endif 171#ifdef UINT16_MAX 172 int check_uint16: (uint16_t) -1 == UINT16_MAX ? 1 : -1; 173#endif 174#ifdef UINT32_MAX 175 int check_uint32: (uint32_t) -1 == UINT32_MAX ? 1 : -1; 176#endif 177#ifdef UINT64_MAX 178 int check_uint64: (uint64_t) -1 == UINT64_MAX ? 1 : -1; 179#endif 180 int check_uint_least8: (uint_least8_t) -1 == UINT_LEAST8_MAX ? 1 : -1; 181 int check_uint_least16: (uint_least16_t) -1 == UINT_LEAST16_MAX ? 1 : -1; 182 int check_uint_least32: (uint_least32_t) -1 == UINT_LEAST32_MAX ? 1 : -1; 183 int check_uint_least64: (uint_least64_t) -1 == UINT_LEAST64_MAX ? 1 : -1; 184 int check_uint_fast8: (uint_fast8_t) -1 == UINT_FAST8_MAX ? 1 : -1; 185 int check_uint_fast16: (uint_fast16_t) -1 == UINT_FAST16_MAX ? 1 : -1; 186 int check_uint_fast32: (uint_fast32_t) -1 == UINT_FAST32_MAX ? 1 : -1; 187 int check_uint_fast64: (uint_fast64_t) -1 == UINT_FAST64_MAX ? 1 : -1; 188 int check_uintptr: (uintptr_t) -1 == UINTPTR_MAX ? 1 : -1; 189 int check_uintmax: (uintmax_t) -1 == UINTMAX_MAX ? 1 : -1; 190 int check_size: (size_t) -1 == SIZE_MAX ? 1 : -1; 191}; 192 ]])], 193 [gl_cv_header_working_stdint_h=yes])]) 194 fi 195 if test "$gl_cv_header_working_stdint_h" != yes; then 196 197 dnl Check for <sys/inttypes.h>, and for 198 dnl <sys/bitypes.h> (used in Linux libc4 >= 4.6.7 and libc5). 199 AC_CHECK_HEADERS([sys/inttypes.h sys/bitypes.h]) 200 if test $ac_cv_header_sys_inttypes_h = yes; then 201 HAVE_SYS_INTTYPES_H=1 202 else 203 HAVE_SYS_INTTYPES_H=0 204 fi 205 AC_SUBST([HAVE_SYS_INTTYPES_H]) 206 if test $ac_cv_header_sys_bitypes_h = yes; then 207 HAVE_SYS_BITYPES_H=1 208 else 209 HAVE_SYS_BITYPES_H=0 210 fi 211 AC_SUBST([HAVE_SYS_BITYPES_H]) 212 213 gl_STDINT_TYPE_PROPERTIES 214 STDINT_H=stdint.h 215 fi 216 AC_SUBST(STDINT_H) 217]) 218 219dnl gl_STDINT_BITSIZEOF(TYPES, INCLUDES) 220dnl Determine the size of each of the given types in bits. 221AC_DEFUN([gl_STDINT_BITSIZEOF], 222[ 223 dnl Use a shell loop, to avoid bloating configure, and 224 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into 225 dnl config.h.in, 226 dnl - extra AC_SUBST calls, so that the right substitutions are made. 227 AC_FOREACH([gltype], [$1], 228 [AH_TEMPLATE([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]), 229 [Define to the number of bits in type ']gltype['.])]) 230 for gltype in $1 ; do 231 AC_CACHE_CHECK([for bit size of $gltype], [gl_cv_bitsizeof_${gltype}], 232 [_AC_COMPUTE_INT([sizeof ($gltype) * CHAR_BIT], result, 233 [$2 234#include <limits.h>], [result=unknown]) 235 eval gl_cv_bitsizeof_${gltype}=\$result 236 ]) 237 eval result=\$gl_cv_bitsizeof_${gltype} 238 if test $result = unknown; then 239 dnl Use a nonempty default, because some compilers, such as IRIX 5 cc, 240 dnl do a syntax check even on unused #if conditions and give an error 241 dnl on valid C code like this: 242 dnl #if 0 243 dnl # if > 32 244 dnl # endif 245 dnl #endif 246 result=0 247 fi 248 GLTYPE=`echo "$gltype" | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'` 249 AC_DEFINE_UNQUOTED([BITSIZEOF_${GLTYPE}], [$result]) 250 eval BITSIZEOF_${GLTYPE}=\$result 251 done 252 AC_FOREACH([gltype], [$1], 253 [AC_SUBST([BITSIZEOF_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))]) 254]) 255 256dnl gl_CHECK_TYPES_SIGNED(TYPES, INCLUDES) 257dnl Determine the signedness of each of the given types. 258dnl Define HAVE_SIGNED_TYPE if type is signed. 259AC_DEFUN([gl_CHECK_TYPES_SIGNED], 260[ 261 dnl Use a shell loop, to avoid bloating configure, and 262 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into 263 dnl config.h.in, 264 dnl - extra AC_SUBST calls, so that the right substitutions are made. 265 AC_FOREACH([gltype], [$1], 266 [AH_TEMPLATE([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]), 267 [Define to 1 if ']gltype[' is a signed integer type.])]) 268 for gltype in $1 ; do 269 AC_CACHE_CHECK([whether $gltype is signed], [gl_cv_type_${gltype}_signed], 270 [AC_COMPILE_IFELSE( 271 [AC_LANG_PROGRAM([$2[ 272 int verify[2 * (($gltype) -1 < ($gltype) 0) - 1];]])], 273 result=yes, result=no) 274 eval gl_cv_type_${gltype}_signed=\$result 275 ]) 276 eval result=\$gl_cv_type_${gltype}_signed 277 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'` 278 if test "$result" = yes; then 279 AC_DEFINE_UNQUOTED([HAVE_SIGNED_${GLTYPE}], 1) 280 eval HAVE_SIGNED_${GLTYPE}=1 281 else 282 eval HAVE_SIGNED_${GLTYPE}=0 283 fi 284 done 285 AC_FOREACH([gltype], [$1], 286 [AC_SUBST([HAVE_SIGNED_]translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_]))]) 287]) 288 289dnl gl_INTEGER_TYPE_SUFFIX(TYPES, INCLUDES) 290dnl Determine the suffix to use for integer constants of the given types. 291dnl Define t_SUFFIX for each such type. 292AC_DEFUN([gl_INTEGER_TYPE_SUFFIX], 293[ 294 dnl Use a shell loop, to avoid bloating configure, and 295 dnl - extra AH_TEMPLATE calls, so that autoheader knows what to put into 296 dnl config.h.in, 297 dnl - extra AC_SUBST calls, so that the right substitutions are made. 298 AC_FOREACH([gltype], [$1], 299 [AH_TEMPLATE(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX], 300 [Define to l, ll, u, ul, ull, etc., as suitable for 301 constants of type ']gltype['.])]) 302 for gltype in $1 ; do 303 AC_CACHE_CHECK([for $gltype integer literal suffix], 304 [gl_cv_type_${gltype}_suffix], 305 [eval gl_cv_type_${gltype}_suffix=no 306 eval result=\$gl_cv_type_${gltype}_signed 307 if test "$result" = yes; then 308 glsufu= 309 else 310 glsufu=u 311 fi 312 for glsuf in "$glsufu" ${glsufu}l ${glsufu}ll ${glsufu}i64; do 313 case $glsuf in 314 '') gltype1='int';; 315 l) gltype1='long int';; 316 ll) gltype1='long long int';; 317 i64) gltype1='__int64';; 318 u) gltype1='unsigned int';; 319 ul) gltype1='unsigned long int';; 320 ull) gltype1='unsigned long long int';; 321 ui64)gltype1='unsigned __int64';; 322 esac 323 AC_COMPILE_IFELSE( 324 [AC_LANG_PROGRAM([$2 325 extern $gltype foo; 326 extern $gltype1 foo;])], 327 [eval gl_cv_type_${gltype}_suffix=\$glsuf]) 328 eval result=\$gl_cv_type_${gltype}_suffix 329 test "$result" != no && break 330 done]) 331 GLTYPE=`echo $gltype | tr 'abcdefghijklmnopqrstuvwxyz ' 'ABCDEFGHIJKLMNOPQRSTUVWXYZ_'` 332 eval result=\$gl_cv_type_${gltype}_suffix 333 test "$result" = no && result= 334 eval ${GLTYPE}_SUFFIX=\$result 335 AC_DEFINE_UNQUOTED([${GLTYPE}_SUFFIX], $result) 336 done 337 AC_FOREACH([gltype], [$1], 338 [AC_SUBST(translit(gltype,[abcdefghijklmnopqrstuvwxyz ],[ABCDEFGHIJKLMNOPQRSTUVWXYZ_])[_SUFFIX])]) 339]) 340 341dnl gl_STDINT_INCLUDES 342AC_DEFUN([gl_STDINT_INCLUDES], 343[[ 344 #include <stddef.h> 345 #include <signal.h> 346 #if HAVE_WCHAR_H 347 /* BSD/OS 4.1 has a bug: <stdio.h> and <time.h> must be included before 348 <wchar.h>. */ 349 # include <stdio.h> 350 # include <time.h> 351 # include <wchar.h> 352 #endif 353]]) 354 355dnl gl_STDINT_TYPE_PROPERTIES 356dnl Compute HAVE_SIGNED_t, BITSIZEOF_t and t_SUFFIX, for all the types t 357dnl of interest to stdint_.h. 358AC_DEFUN([gl_STDINT_TYPE_PROPERTIES], 359[ 360 gl_STDINT_BITSIZEOF([ptrdiff_t sig_atomic_t size_t wchar_t wint_t], 361 [gl_STDINT_INCLUDES]) 362 gl_CHECK_TYPES_SIGNED([sig_atomic_t wchar_t wint_t], 363 [gl_STDINT_INCLUDES]) 364 gl_cv_type_ptrdiff_t_signed=yes 365 gl_cv_type_size_t_signed=no 366 gl_INTEGER_TYPE_SUFFIX([ptrdiff_t sig_atomic_t size_t wchar_t wint_t], 367 [gl_STDINT_INCLUDES]) 368]) 369