stdint.m4 revision 1.1.1.1
1dnl @synopsis GCC_HEADER_STDINT [( HEADER-TO-GENERATE [, HEADERS-TO-CHECK])] 2dnl 3dnl the "ISO C9X: 7.18 Integer types <stdint.h>" section requires the 4dnl existence of an include file <stdint.h> that defines a set of 5dnl typedefs, especially uint8_t,int32_t,uintptr_t. 6dnl Many older installations will not provide this file, but some will 7dnl have the very same definitions in <inttypes.h>. In other enviroments 8dnl we can use the inet-types in <sys/types.h> which would define the 9dnl typedefs int8_t and u_int8_t respectivly. 10dnl 11dnl This macros will create a local "_stdint.h" or the headerfile given as 12dnl an argument. In many cases that file will pick the definition from a 13dnl "#include <stdint.h>" or "#include <inttypes.h>" statement, while 14dnl in other environments it will provide the set of basic 'stdint's defined: 15dnl int8_t,uint8_t,int16_t,uint16_t,int32_t,uint32_t,intptr_t,uintptr_t 16dnl int_least32_t.. int_fast32_t.. intmax_t 17dnl which may or may not rely on the definitions of other files. 18dnl 19dnl Sometimes the stdint.h or inttypes.h headers conflict with sys/types.h, 20dnl so we test the headers together with sys/types.h and always include it 21dnl into the generated header (to match the tests with the generated file). 22dnl Hopefully this is not a big annoyance. 23dnl 24dnl If your installed header files require the stdint-types you will want to 25dnl create an installable file mylib-int.h that all your other installable 26dnl header may include. So, for a library package named "mylib", just use 27dnl GCC_HEADER_STDINT(mylib-int.h) 28dnl in configure.in and install that header file in Makefile.am along with 29dnl the other headers (mylib.h). The mylib-specific headers can simply 30dnl use "#include <mylib-int.h>" to obtain the stdint-types. 31dnl 32dnl Remember, if the system already had a valid <stdint.h>, the generated 33dnl file will include it directly. No need for fuzzy HAVE_STDINT_H things... 34dnl 35dnl @author Guido Draheim <guidod@gmx.de>, Paolo Bonzini <bonzini@gnu.org> 36 37AC_DEFUN([GCC_HEADER_STDINT], 38[m4_define(_GCC_STDINT_H, m4_ifval($1, $1, _stdint.h)) 39 40inttype_headers=`echo inttypes.h sys/inttypes.h $2 | sed -e 's/,/ /g'` 41 42acx_cv_header_stdint=stddef.h 43acx_cv_header_stdint_kind="(already complete)" 44for i in stdint.h $inttype_headers; do 45 unset ac_cv_type_uintptr_t 46 unset ac_cv_type_uintmax_t 47 unset ac_cv_type_int_least32_t 48 unset ac_cv_type_int_fast32_t 49 unset ac_cv_type_uint64_t 50 _AS_ECHO_N([looking for a compliant stdint.h in $i, ]) 51 AC_CHECK_TYPE(uintmax_t,[acx_cv_header_stdint=$i],continue,[#include <sys/types.h> 52#include <$i>]) 53 AC_CHECK_TYPE(uintptr_t,,[acx_cv_header_stdint_kind="(mostly complete)"], [#include <sys/types.h> 54#include <$i>]) 55 AC_CHECK_TYPE(int_least32_t,,[acx_cv_header_stdint_kind="(mostly complete)"], [#include <sys/types.h> 56#include <$i>]) 57 AC_CHECK_TYPE(int_fast32_t,,[acx_cv_header_stdint_kind="(mostly complete)"], [#include <sys/types.h> 58#include <$i>]) 59 AC_CHECK_TYPE(uint64_t,,[acx_cv_header_stdint_kind="(lacks uint64_t)"], [#include <sys/types.h> 60#include <$i>]) 61 break 62done 63if test "$acx_cv_header_stdint" = stddef.h; then 64 acx_cv_header_stdint_kind="(lacks uintmax_t)" 65 for i in stdint.h $inttype_headers; do 66 unset ac_cv_type_uintptr_t 67 unset ac_cv_type_uint32_t 68 unset ac_cv_type_uint64_t 69 _AS_ECHO_N([looking for an incomplete stdint.h in $i, ]) 70 AC_CHECK_TYPE(uint32_t,[acx_cv_header_stdint=$i],continue,[#include <sys/types.h> 71#include <$i>]) 72 AC_CHECK_TYPE(uint64_t,,,[#include <sys/types.h> 73#include <$i>]) 74 AC_CHECK_TYPE(uintptr_t,,,[#include <sys/types.h> 75#include <$i>]) 76 break 77 done 78fi 79if test "$acx_cv_header_stdint" = stddef.h; then 80 acx_cv_header_stdint_kind="(u_intXX_t style)" 81 for i in sys/types.h $inttype_headers; do 82 unset ac_cv_type_u_int32_t 83 unset ac_cv_type_u_int64_t 84 _AS_ECHO_N([looking for u_intXX_t types in $i, ]) 85 AC_CHECK_TYPE(u_int32_t,[acx_cv_header_stdint=$i],continue,[#include <sys/types.h> 86#include <$i>]) 87 AC_CHECK_TYPE(u_int64_t,,,[#include <sys/types.h> 88#include <$i>]) 89 break 90 done 91fi 92if test "$acx_cv_header_stdint" = stddef.h; then 93 acx_cv_header_stdint_kind="(using manual detection)" 94fi 95 96test -z "$ac_cv_type_uintptr_t" && ac_cv_type_uintptr_t=no 97test -z "$ac_cv_type_uint64_t" && ac_cv_type_uint64_t=no 98test -z "$ac_cv_type_u_int64_t" && ac_cv_type_u_int64_t=no 99test -z "$ac_cv_type_int_least32_t" && ac_cv_type_int_least32_t=no 100test -z "$ac_cv_type_int_fast32_t" && ac_cv_type_int_fast32_t=no 101 102# ----------------- Summarize what we found so far 103 104AC_MSG_CHECKING([what to include in _GCC_STDINT_H]) 105 106case `AS_BASENAME(_GCC_STDINT_H)` in 107 stdint.h) AC_MSG_WARN([are you sure you want it there?]) ;; 108 inttypes.h) AC_MSG_WARN([are you sure you want it there?]) ;; 109 *) ;; 110esac 111 112AC_MSG_RESULT($acx_cv_header_stdint $acx_cv_header_stdint_kind) 113 114# ----------------- done included file, check C basic types -------- 115 116# Lacking an uintptr_t? Test size of void * 117case "$acx_cv_header_stdint:$ac_cv_type_uintptr_t" in 118 stddef.h:* | *:no) AC_CHECK_SIZEOF(void *) ;; 119esac 120 121# Lacking an uint64_t? Test size of long 122case "$acx_cv_header_stdint:$ac_cv_type_uint64_t:$ac_cv_type_u_int64_t" in 123 stddef.h:*:* | *:no:no) AC_CHECK_SIZEOF(long) ;; 124esac 125 126if test $acx_cv_header_stdint = stddef.h; then 127 # Lacking a good header? Test size of everything and deduce all types. 128 AC_CHECK_SIZEOF(int) 129 AC_CHECK_SIZEOF(short) 130 AC_CHECK_SIZEOF(char) 131 132 AC_MSG_CHECKING(for type equivalent to int8_t) 133 case "$ac_cv_sizeof_char" in 134 1) acx_cv_type_int8_t=char ;; 135 *) AC_MSG_ERROR(no 8-bit type, please report a bug) 136 esac 137 AC_MSG_RESULT($acx_cv_type_int8_t) 138 139 AC_MSG_CHECKING(for type equivalent to int16_t) 140 case "$ac_cv_sizeof_int:$ac_cv_sizeof_short" in 141 2:*) acx_cv_type_int16_t=int ;; 142 *:2) acx_cv_type_int16_t=short ;; 143 *) AC_MSG_ERROR(no 16-bit type, please report a bug) 144 esac 145 AC_MSG_RESULT($acx_cv_type_int16_t) 146 147 AC_MSG_CHECKING(for type equivalent to int32_t) 148 case "$ac_cv_sizeof_int:$ac_cv_sizeof_long" in 149 4:*) acx_cv_type_int32_t=int ;; 150 *:4) acx_cv_type_int32_t=long ;; 151 *) AC_MSG_ERROR(no 32-bit type, please report a bug) 152 esac 153 AC_MSG_RESULT($acx_cv_type_int32_t) 154fi 155 156# These tests are here to make the output prettier 157 158if test "$ac_cv_type_uint64_t" != yes && test "$ac_cv_type_u_int64_t" != yes; then 159 case "$ac_cv_sizeof_long" in 160 8) acx_cv_type_int64_t=long ;; 161 esac 162 AC_MSG_CHECKING(for type equivalent to int64_t) 163 AC_MSG_RESULT(${acx_cv_type_int64_t-'using preprocessor symbols'}) 164fi 165 166# Now we can use the above types 167 168if test "$ac_cv_type_uintptr_t" != yes; then 169 AC_MSG_CHECKING(for type equivalent to intptr_t) 170 case $ac_cv_sizeof_void_p in 171 2) acx_cv_type_intptr_t=int16_t ;; 172 4) acx_cv_type_intptr_t=int32_t ;; 173 8) acx_cv_type_intptr_t=int64_t ;; 174 *) AC_MSG_ERROR(no equivalent for intptr_t, please report a bug) 175 esac 176 AC_MSG_RESULT($acx_cv_type_intptr_t) 177fi 178 179# ----------------- done all checks, emit header ------------- 180AC_CONFIG_COMMANDS(_GCC_STDINT_H, [ 181if test "$GCC" = yes; then 182 echo "/* generated for " `$CC --version | sed 1q` "*/" > tmp-stdint.h 183else 184 echo "/* generated for $CC */" > tmp-stdint.h 185fi 186 187sed 's/^ *//' >> tmp-stdint.h <<EOF 188 189 #ifndef GCC_GENERATED_STDINT_H 190 #define GCC_GENERATED_STDINT_H 1 191 192 #include <sys/types.h> 193EOF 194 195if test "$acx_cv_header_stdint" != stdint.h; then 196 echo "#include <stddef.h>" >> tmp-stdint.h 197fi 198if test "$acx_cv_header_stdint" != stddef.h; then 199 echo "#include <$acx_cv_header_stdint>" >> tmp-stdint.h 200fi 201 202sed 's/^ *//' >> tmp-stdint.h <<EOF 203 /* glibc uses these symbols as guards to prevent redefinitions. */ 204 #ifdef __int8_t_defined 205 #define _INT8_T 206 #define _INT16_T 207 #define _INT32_T 208 #endif 209 #ifdef __uint32_t_defined 210 #define _UINT32_T 211 #endif 212 213EOF 214 215# ----------------- done header, emit basic int types ------------- 216if test "$acx_cv_header_stdint" = stddef.h; then 217 sed 's/^ *//' >> tmp-stdint.h <<EOF 218 219 #ifndef _UINT8_T 220 #define _UINT8_T 221 #ifndef __uint8_t_defined 222 #define __uint8_t_defined 223 typedef unsigned $acx_cv_type_int8_t uint8_t; 224 #endif 225 #endif 226 227 #ifndef _UINT16_T 228 #define _UINT16_T 229 #ifndef __uint16_t_defined 230 #define __uint16_t_defined 231 typedef unsigned $acx_cv_type_int16_t uint16_t; 232 #endif 233 #endif 234 235 #ifndef _UINT32_T 236 #define _UINT32_T 237 #ifndef __uint32_t_defined 238 #define __uint32_t_defined 239 typedef unsigned $acx_cv_type_int32_t uint32_t; 240 #endif 241 #endif 242 243 #ifndef _INT8_T 244 #define _INT8_T 245 #ifndef __int8_t_defined 246 #define __int8_t_defined 247 typedef $acx_cv_type_int8_t int8_t; 248 #endif 249 #endif 250 251 #ifndef _INT16_T 252 #define _INT16_T 253 #ifndef __int16_t_defined 254 #define __int16_t_defined 255 typedef $acx_cv_type_int16_t int16_t; 256 #endif 257 #endif 258 259 #ifndef _INT32_T 260 #define _INT32_T 261 #ifndef __int32_t_defined 262 #define __int32_t_defined 263 typedef $acx_cv_type_int32_t int32_t; 264 #endif 265 #endif 266EOF 267elif test "$ac_cv_type_u_int32_t" = yes; then 268 sed 's/^ *//' >> tmp-stdint.h <<EOF 269 270 /* int8_t int16_t int32_t defined by inet code, we do the u_intXX types */ 271 #ifndef _INT8_T 272 #define _INT8_T 273 #endif 274 #ifndef _INT16_T 275 #define _INT16_T 276 #endif 277 #ifndef _INT32_T 278 #define _INT32_T 279 #endif 280 281 #ifndef _UINT8_T 282 #define _UINT8_T 283 #ifndef __uint8_t_defined 284 #define __uint8_t_defined 285 typedef u_int8_t uint8_t; 286 #endif 287 #endif 288 289 #ifndef _UINT16_T 290 #define _UINT16_T 291 #ifndef __uint16_t_defined 292 #define __uint16_t_defined 293 typedef u_int16_t uint16_t; 294 #endif 295 #endif 296 297 #ifndef _UINT32_T 298 #define _UINT32_T 299 #ifndef __uint32_t_defined 300 #define __uint32_t_defined 301 typedef u_int32_t uint32_t; 302 #endif 303 #endif 304EOF 305else 306 sed 's/^ *//' >> tmp-stdint.h <<EOF 307 308 /* Some systems have guard macros to prevent redefinitions, define them. */ 309 #ifndef _INT8_T 310 #define _INT8_T 311 #endif 312 #ifndef _INT16_T 313 #define _INT16_T 314 #endif 315 #ifndef _INT32_T 316 #define _INT32_T 317 #endif 318 #ifndef _UINT8_T 319 #define _UINT8_T 320 #endif 321 #ifndef _UINT16_T 322 #define _UINT16_T 323 #endif 324 #ifndef _UINT32_T 325 #define _UINT32_T 326 #endif 327EOF 328fi 329 330# ------------- done basic int types, emit int64_t types ------------ 331if test "$ac_cv_type_uint64_t" = yes; then 332 sed 's/^ *//' >> tmp-stdint.h <<EOF 333 334 /* system headers have good uint64_t and int64_t */ 335 #ifndef _INT64_T 336 #define _INT64_T 337 #endif 338 #ifndef _UINT64_T 339 #define _UINT64_T 340 #endif 341EOF 342elif test "$ac_cv_type_u_int64_t" = yes; then 343 sed 's/^ *//' >> tmp-stdint.h <<EOF 344 345 /* system headers have an u_int64_t (and int64_t) */ 346 #ifndef _INT64_T 347 #define _INT64_T 348 #endif 349 #ifndef _UINT64_T 350 #define _UINT64_T 351 #ifndef __uint64_t_defined 352 #define __uint64_t_defined 353 typedef u_int64_t uint64_t; 354 #endif 355 #endif 356EOF 357elif test -n "$acx_cv_type_int64_t"; then 358 sed 's/^ *//' >> tmp-stdint.h <<EOF 359 360 /* architecture has a 64-bit type, $acx_cv_type_int64_t */ 361 #ifndef _INT64_T 362 #define _INT64_T 363 typedef $acx_cv_type_int64_t int64_t; 364 #endif 365 #ifndef _UINT64_T 366 #define _UINT64_T 367 #ifndef __uint64_t_defined 368 #define __uint64_t_defined 369 typedef unsigned $acx_cv_type_int64_t uint64_t; 370 #endif 371 #endif 372EOF 373else 374 sed 's/^ *//' >> tmp-stdint.h <<EOF 375 376 /* some common heuristics for int64_t, using compiler-specific tests */ 377 #if defined __STDC_VERSION__ && (__STDC_VERSION__-0) >= 199901L 378 #ifndef _INT64_T 379 #define _INT64_T 380 #ifndef __int64_t_defined 381 typedef long long int64_t; 382 #endif 383 #endif 384 #ifndef _UINT64_T 385 #define _UINT64_T 386 typedef unsigned long long uint64_t; 387 #endif 388 389 #elif defined __GNUC__ && defined (__STDC__) && __STDC__-0 390 /* NextStep 2.0 cc is really gcc 1.93 but it defines __GNUC__ = 2 and 391 does not implement __extension__. But that compiler doesn't define 392 __GNUC_MINOR__. */ 393 # if __GNUC__ < 2 || (__NeXT__ && !__GNUC_MINOR__) 394 # define __extension__ 395 # endif 396 397 # ifndef _INT64_T 398 # define _INT64_T 399 __extension__ typedef long long int64_t; 400 # endif 401 # ifndef _UINT64_T 402 # define _UINT64_T 403 __extension__ typedef unsigned long long uint64_t; 404 # endif 405 406 #elif !defined __STRICT_ANSI__ 407 # if defined _MSC_VER || defined __WATCOMC__ || defined __BORLANDC__ 408 409 # ifndef _INT64_T 410 # define _INT64_T 411 typedef __int64 int64_t; 412 # endif 413 # ifndef _UINT64_T 414 # define _UINT64_T 415 typedef unsigned __int64 uint64_t; 416 # endif 417 # endif /* compiler */ 418 419 #endif /* ANSI version */ 420EOF 421fi 422 423# ------------- done int64_t types, emit intptr types ------------ 424if test "$ac_cv_type_uintptr_t" != yes; then 425 sed 's/^ *//' >> tmp-stdint.h <<EOF 426 427 /* Define intptr_t based on sizeof(void*) = $ac_cv_sizeof_void_p */ 428 #ifndef __uintptr_t_defined 429 typedef u$acx_cv_type_intptr_t uintptr_t; 430 #endif 431 #ifndef __intptr_t_defined 432 typedef $acx_cv_type_intptr_t intptr_t; 433 #endif 434EOF 435fi 436 437# ------------- done intptr types, emit int_least types ------------ 438if test "$ac_cv_type_int_least32_t" != yes; then 439 sed 's/^ *//' >> tmp-stdint.h <<EOF 440 441 /* Define int_least types */ 442 typedef int8_t int_least8_t; 443 typedef int16_t int_least16_t; 444 typedef int32_t int_least32_t; 445 #ifdef _INT64_T 446 typedef int64_t int_least64_t; 447 #endif 448 449 typedef uint8_t uint_least8_t; 450 typedef uint16_t uint_least16_t; 451 typedef uint32_t uint_least32_t; 452 #ifdef _UINT64_T 453 typedef uint64_t uint_least64_t; 454 #endif 455EOF 456fi 457 458# ------------- done intptr types, emit int_fast types ------------ 459if test "$ac_cv_type_int_fast32_t" != yes; then 460 dnl NOTE: The following code assumes that sizeof (int) > 1. 461 dnl Fix when strange machines are reported. 462 sed 's/^ *//' >> tmp-stdint.h <<EOF 463 464 /* Define int_fast types. short is often slow */ 465 typedef int8_t int_fast8_t; 466 typedef int int_fast16_t; 467 typedef int32_t int_fast32_t; 468 #ifdef _INT64_T 469 typedef int64_t int_fast64_t; 470 #endif 471 472 typedef uint8_t uint_fast8_t; 473 typedef unsigned int uint_fast16_t; 474 typedef uint32_t uint_fast32_t; 475 #ifdef _UINT64_T 476 typedef uint64_t uint_fast64_t; 477 #endif 478EOF 479fi 480 481if test "$ac_cv_type_uintmax_t" != yes; then 482 sed 's/^ *//' >> tmp-stdint.h <<EOF 483 484 /* Define intmax based on what we found */ 485 #ifdef _INT64_T 486 typedef int64_t intmax_t; 487 #else 488 typedef long intmax_t; 489 #endif 490 #ifdef _UINT64_T 491 typedef uint64_t uintmax_t; 492 #else 493 typedef unsigned long uintmax_t; 494 #endif 495EOF 496fi 497 498sed 's/^ *//' >> tmp-stdint.h <<EOF 499 500 #endif /* GCC_GENERATED_STDINT_H */ 501EOF 502 503if test -r ]_GCC_STDINT_H[ && cmp -s tmp-stdint.h ]_GCC_STDINT_H[; then 504 rm -f tmp-stdint.h 505else 506 mv -f tmp-stdint.h ]_GCC_STDINT_H[ 507fi 508 509], [ 510GCC="$GCC" 511CC="$CC" 512acx_cv_header_stdint="$acx_cv_header_stdint" 513acx_cv_type_int8_t="$acx_cv_type_int8_t" 514acx_cv_type_int16_t="$acx_cv_type_int16_t" 515acx_cv_type_int32_t="$acx_cv_type_int32_t" 516acx_cv_type_int64_t="$acx_cv_type_int64_t" 517acx_cv_type_intptr_t="$acx_cv_type_intptr_t" 518ac_cv_type_uintmax_t="$ac_cv_type_uintmax_t" 519ac_cv_type_uintptr_t="$ac_cv_type_uintptr_t" 520ac_cv_type_uint64_t="$ac_cv_type_uint64_t" 521ac_cv_type_u_int64_t="$ac_cv_type_u_int64_t" 522ac_cv_type_u_int32_t="$ac_cv_type_u_int32_t" 523ac_cv_type_int_least32_t="$ac_cv_type_int_least32_t" 524ac_cv_type_int_fast32_t="$ac_cv_type_int_fast32_t" 525ac_cv_sizeof_void_p="$ac_cv_sizeof_void_p" 526]) 527 528]) 529