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 typedef unsigned $acx_cv_type_int8_t uint8_t; 222 #endif 223 224 #ifndef _UINT16_T 225 #define _UINT16_T 226 typedef unsigned $acx_cv_type_int16_t uint16_t; 227 #endif 228 229 #ifndef _UINT32_T 230 #define _UINT32_T 231 typedef unsigned $acx_cv_type_int32_t uint32_t; 232 #endif 233 234 #ifndef _INT8_T 235 #define _INT8_T 236 typedef $acx_cv_type_int8_t int8_t; 237 #endif 238 239 #ifndef _INT16_T 240 #define _INT16_T 241 typedef $acx_cv_type_int16_t int16_t; 242 #endif 243 244 #ifndef _INT32_T 245 #define _INT32_T 246 typedef $acx_cv_type_int32_t int32_t; 247 #endif 248EOF 249elif test "$ac_cv_type_u_int32_t" = yes; then 250 sed 's/^ *//' >> tmp-stdint.h <<EOF 251 252 /* int8_t int16_t int32_t defined by inet code, we do the u_intXX types */ 253 #ifndef _INT8_T 254 #define _INT8_T 255 #endif 256 #ifndef _INT16_T 257 #define _INT16_T 258 #endif 259 #ifndef _INT32_T 260 #define _INT32_T 261 #endif 262 263 #ifndef _UINT8_T 264 #define _UINT8_T 265 typedef u_int8_t uint8_t; 266 #endif 267 268 #ifndef _UINT16_T 269 #define _UINT16_T 270 typedef u_int16_t uint16_t; 271 #endif 272 273 #ifndef _UINT32_T 274 #define _UINT32_T 275 typedef u_int32_t uint32_t; 276 #endif 277EOF 278else 279 sed 's/^ *//' >> tmp-stdint.h <<EOF 280 281 /* Some systems have guard macros to prevent redefinitions, define them. */ 282 #ifndef _INT8_T 283 #define _INT8_T 284 #endif 285 #ifndef _INT16_T 286 #define _INT16_T 287 #endif 288 #ifndef _INT32_T 289 #define _INT32_T 290 #endif 291 #ifndef _UINT8_T 292 #define _UINT8_T 293 #endif 294 #ifndef _UINT16_T 295 #define _UINT16_T 296 #endif 297 #ifndef _UINT32_T 298 #define _UINT32_T 299 #endif 300EOF 301fi 302 303# ------------- done basic int types, emit int64_t types ------------ 304if test "$ac_cv_type_uint64_t" = yes; then 305 sed 's/^ *//' >> tmp-stdint.h <<EOF 306 307 /* system headers have good uint64_t and int64_t */ 308 #ifndef _INT64_T 309 #define _INT64_T 310 #endif 311 #ifndef _UINT64_T 312 #define _UINT64_T 313 #endif 314EOF 315elif test "$ac_cv_type_u_int64_t" = yes; then 316 sed 's/^ *//' >> tmp-stdint.h <<EOF 317 318 /* system headers have an u_int64_t (and int64_t) */ 319 #ifndef _INT64_T 320 #define _INT64_T 321 #endif 322 #ifndef _UINT64_T 323 #define _UINT64_T 324 typedef u_int64_t uint64_t; 325 #endif 326EOF 327elif test -n "$acx_cv_type_int64_t"; then 328 sed 's/^ *//' >> tmp-stdint.h <<EOF 329 330 /* architecture has a 64-bit type, $acx_cv_type_int64_t */ 331 #ifndef _INT64_T 332 #define _INT64_T 333 typedef $acx_cv_type_int64_t int64_t; 334 #endif 335 #ifndef _UINT64_T 336 #define _UINT64_T 337 typedef unsigned $acx_cv_type_int64_t uint64_t; 338 #endif 339EOF 340else 341 sed 's/^ *//' >> tmp-stdint.h <<EOF 342 343 /* some common heuristics for int64_t, using compiler-specific tests */ 344 #if defined __STDC_VERSION__ && (__STDC_VERSION__-0) >= 199901L 345 #ifndef _INT64_T 346 #define _INT64_T 347 typedef long long int64_t; 348 #endif 349 #ifndef _UINT64_T 350 #define _UINT64_T 351 typedef unsigned long long uint64_t; 352 #endif 353 354 #elif defined __GNUC__ && defined (__STDC__) && __STDC__-0 355 /* NextStep 2.0 cc is really gcc 1.93 but it defines __GNUC__ = 2 and 356 does not implement __extension__. But that compiler doesn't define 357 __GNUC_MINOR__. */ 358 # if __GNUC__ < 2 || (__NeXT__ && !__GNUC_MINOR__) 359 # define __extension__ 360 # endif 361 362 # ifndef _INT64_T 363 # define _INT64_T 364 __extension__ typedef long long int64_t; 365 # endif 366 # ifndef _UINT64_T 367 # define _UINT64_T 368 __extension__ typedef unsigned long long uint64_t; 369 # endif 370 371 #elif !defined __STRICT_ANSI__ 372 # if defined _MSC_VER || defined __WATCOMC__ || defined __BORLANDC__ 373 374 # ifndef _INT64_T 375 # define _INT64_T 376 typedef __int64 int64_t; 377 # endif 378 # ifndef _UINT64_T 379 # define _UINT64_T 380 typedef unsigned __int64 uint64_t; 381 # endif 382 # endif /* compiler */ 383 384 #endif /* ANSI version */ 385EOF 386fi 387 388# ------------- done int64_t types, emit intptr types ------------ 389if test "$ac_cv_type_uintptr_t" != yes; then 390 sed 's/^ *//' >> tmp-stdint.h <<EOF 391 392 /* Define intptr_t based on sizeof(void*) = $ac_cv_sizeof_void_p */ 393 typedef u$acx_cv_type_intptr_t uintptr_t; 394 typedef $acx_cv_type_intptr_t intptr_t; 395EOF 396fi 397 398# ------------- done intptr types, emit int_least types ------------ 399if test "$ac_cv_type_int_least32_t" != yes; then 400 sed 's/^ *//' >> tmp-stdint.h <<EOF 401 402 /* Define int_least types */ 403 typedef int8_t int_least8_t; 404 typedef int16_t int_least16_t; 405 typedef int32_t int_least32_t; 406 #ifdef _INT64_T 407 typedef int64_t int_least64_t; 408 #endif 409 410 typedef uint8_t uint_least8_t; 411 typedef uint16_t uint_least16_t; 412 typedef uint32_t uint_least32_t; 413 #ifdef _UINT64_T 414 typedef uint64_t uint_least64_t; 415 #endif 416EOF 417fi 418 419# ------------- done intptr types, emit int_fast types ------------ 420if test "$ac_cv_type_int_fast32_t" != yes; then 421 dnl NOTE: The following code assumes that sizeof (int) > 1. 422 dnl Fix when strange machines are reported. 423 sed 's/^ *//' >> tmp-stdint.h <<EOF 424 425 /* Define int_fast types. short is often slow */ 426 typedef int8_t int_fast8_t; 427 typedef int int_fast16_t; 428 typedef int32_t int_fast32_t; 429 #ifdef _INT64_T 430 typedef int64_t int_fast64_t; 431 #endif 432 433 typedef uint8_t uint_fast8_t; 434 typedef unsigned int uint_fast16_t; 435 typedef uint32_t uint_fast32_t; 436 #ifdef _UINT64_T 437 typedef uint64_t uint_fast64_t; 438 #endif 439EOF 440fi 441 442if test "$ac_cv_type_uintmax_t" != yes; then 443 sed 's/^ *//' >> tmp-stdint.h <<EOF 444 445 /* Define intmax based on what we found */ 446 #ifdef _INT64_T 447 typedef int64_t intmax_t; 448 #else 449 typedef long intmax_t; 450 #endif 451 #ifdef _UINT64_T 452 typedef uint64_t uintmax_t; 453 #else 454 typedef unsigned long uintmax_t; 455 #endif 456EOF 457fi 458 459sed 's/^ *//' >> tmp-stdint.h <<EOF 460 461 #endif /* GCC_GENERATED_STDINT_H */ 462EOF 463 464if test -r ]_GCC_STDINT_H[ && cmp -s tmp-stdint.h ]_GCC_STDINT_H[; then 465 rm -f tmp-stdint.h 466else 467 mv -f tmp-stdint.h ]_GCC_STDINT_H[ 468fi 469 470], [ 471GCC="$GCC" 472CC="$CC" 473acx_cv_header_stdint="$acx_cv_header_stdint" 474acx_cv_type_int8_t="$acx_cv_type_int8_t" 475acx_cv_type_int16_t="$acx_cv_type_int16_t" 476acx_cv_type_int32_t="$acx_cv_type_int32_t" 477acx_cv_type_int64_t="$acx_cv_type_int64_t" 478acx_cv_type_intptr_t="$acx_cv_type_intptr_t" 479ac_cv_type_uintmax_t="$ac_cv_type_uintmax_t" 480ac_cv_type_uintptr_t="$ac_cv_type_uintptr_t" 481ac_cv_type_uint64_t="$ac_cv_type_uint64_t" 482ac_cv_type_u_int64_t="$ac_cv_type_u_int64_t" 483ac_cv_type_u_int32_t="$ac_cv_type_u_int32_t" 484ac_cv_type_int_least32_t="$ac_cv_type_int_least32_t" 485ac_cv_type_int_fast32_t="$ac_cv_type_int_fast32_t" 486ac_cv_sizeof_void_p="$ac_cv_sizeof_void_p" 487]) 488 489]) 490