1: dnl @synopsis GCC_HEADER_STDINT [( HEADER-TO-GENERATE [, HEADERS-TO-CHECK])] 2: dnl 3: dnl the "ISO C9X: 7.18 Integer types <stdint.h>" section requires the 4: dnl existence of an include file <stdint.h> that defines a set of 5: dnl typedefs, especially uint8_t,int32_t,uintptr_t. 6: dnl Many older installations will not provide this file, but some will 7: dnl have the very same definitions in <inttypes.h>. In other enviroments 8: dnl we can use the inet-types in <sys/types.h> which would define the 9: dnl typedefs int8_t and u_int8_t respectivly. 10: dnl 11: dnl This macros will create a local "_stdint.h" or the headerfile given as 12: dnl an argument. In many cases that file will pick the definition from a 13: dnl "#include <stdint.h>" or "#include <inttypes.h>" statement, while 14: dnl in other environments it will provide the set of basic 'stdint's defined: 15: dnl int8_t,uint8_t,int16_t,uint16_t,int32_t,uint32_t,intptr_t,uintptr_t 16: dnl int_least32_t.. int_fast32_t.. intmax_t 17: dnl which may or may not rely on the definitions of other files. 18: dnl 19: dnl Sometimes the stdint.h or inttypes.h headers conflict with sys/types.h, 20: dnl so we test the headers together with sys/types.h and always include it 21: dnl into the generated header (to match the tests with the generated file). 22: dnl Hopefully this is not a big annoyance. 23: dnl 24: dnl If your installed header files require the stdint-types you will want to 25: dnl create an installable file mylib-int.h that all your other installable 26: dnl header may include. So, for a library package named "mylib", just use 27: dnl GCC_HEADER_STDINT(mylib-int.h) 28: dnl in configure.in and install that header file in Makefile.am along with 29: dnl the other headers (mylib.h). The mylib-specific headers can simply 30: dnl use "#include <mylib-int.h>" to obtain the stdint-types. 31: dnl 32: dnl Remember, if the system already had a valid <stdint.h>, the generated 33: dnl file will include it directly. No need for fuzzy HAVE_STDINT_H things... 34: dnl 35: dnl @author Guido Draheim <guidod@gmx.de>, Paolo Bonzini <bonzini@gnu.org> 36: 37: AC_DEFUN([GCC_HEADER_STDINT], 38: [m4_define(_GCC_STDINT_H, m4_ifval($1, $1, _stdint.h)) 39: 40: inttype_headers=`echo inttypes.h sys/inttypes.h $2 | sed -e 's/,/ /g'` 41: 42: acx_cv_header_stdint=stddef.h 43: acx_cv_header_stdint_kind="(already complete)" 44: for 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 <$i>]) 61: break 62: done 63: if test "$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 <$i>]) 76: break 77: done 78: fi 79: if test "$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 91: fi 92: if test "$acx_cv_header_stdint" = stddef.h; then 93: acx_cv_header_stdint_kind="(using manual detection)" 94: fi 95: 96: test -z "$ac_cv_type_uintptr_t" && ac_cv_type_uintptr_t=no 97: test -z "$ac_cv_type_uint64_t" && ac_cv_type_uint64_t=no 98: test -z "$ac_cv_type_u_int64_t" && ac_cv_type_u_int64_t=no 99: test -z "$ac_cv_type_int_least32_t" && ac_cv_type_int_least32_t=no 100: test -z "$ac_cv_type_int_fast32_t" && ac_cv_type_int_fast32_t=no 101: 102: # ----------------- Summarize what we found so far 103: 104: AC_MSG_CHECKING([what to include in _GCC_STDINT_H]) 105: 106: case `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: *) ;; 110: esac 111: 112: AC_MSG_RESULT($acx_cv_header_stdint $acx_cv_header_stdint_kind) 113: 114: # ----------------- done included file, check C basic types -------- 115: 116: # Lacking an uintptr_t? Test size of void * 117: case "$acx_cv_header_stdint:$ac_cv_type_uintptr_t" in 118: stddef.h:* | *:no) AC_CHECK_SIZEOF(void *) ;; 119: esac 120: 121: # Lacking an uint64_t? Test size of long 122: case "$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) ;; 124: esac 125: 126: if 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($acx_cv_type_int32_t) 154: fi 155: 156: # These tests are here to make the output prettier 157: 158: if test "$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(${acx_cv_type_int64_t-'using preprocessor symbols'}) 164: fi 165: 166: # Now we can use the above types 167: 168: if test "$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) 177: fi 178: 179: # ----------------- done all checks, emit header ------------- 180: AC_CONFIG_COMMANDS(_GCC_STDINT_H, [ 181: if test "$GCC" = yes; then 182: echo "/* generated for " `$CC --version | sed 1q` "*/" > tmp-stdint.h 183: else 184: echo "/* generated for $CC */" > tmp-stdint.h 185: fi 186: 187: sed 's/^ *//' >> tmp-stdint.h <<EOF 188: 189: #ifndef GCC_GENERATED_STDINT_H 190: #define GCC_GENERATED_STDINT_H 1 191: 192: #include <sys/types.h> 193: EOF 194: 195: if test "$acx_cv_header_stdint" != stdint.h; then 196: echo "#include <stddef.h>" >> tmp-stdint.h 197: fi 198: if test "$acx_cv_header_stdint" != stddef.h; then 199: echo "#include <$acx_cv_header_stdint>" >> tmp-stdint.h 200: fi 201: 202: sed '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: 213: EOF 214: 215: # ----------------- done header, emit basic int types ------------- 216: if 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 $acx_cv_type_int32_t int32_t; 264: #endif 265: #endif 266: EOF 267: elif test "$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 304: EOF 305: else 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 327: EOF 328: fi 329: 330: # ------------- done basic int types, emit int64_t types ------------ 331: if test "$ac_cv_type_uint64_t" = yes; then 332: sed 's/^ *//' >> tmp-stdint.h <<EOF 333: 334: /* system headers have good uint64_t and int64_t */ 335: #ifndef _INT64_T 336: #define _INT64_T 337: #endif 338: #ifndef _UINT64_T 339: #define _UINT64_T 340: #endif 341: EOF 342: elif test "$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 356: EOF 357: elif 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 $acx_cv_type_int64_t uint64_t; 370: #endif 371: #endif 372: EOF 373: else 374: sed 's/^ *//' >> tmp-stdint.h <<EOF 375: 376: /* some common heuristics for int64_t, using compiler-specific tests */ 377: #if defined __STDC_VERSION__ && (__STDC_VERSION__-0) >= 199901L 378: #ifndef _INT64_T 379: #define _INT64_T 380: #ifndef __int64_t_defined 381: typedef long long int64_t; 382: #endif 383: #endif 384: #ifndef _UINT64_T 385: #define _UINT64_T 386: typedef unsigned long long uint64_t; 387: #endif 388: 389: #elif defined __GNUC__ && defined (__STDC__) && __STDC__-0 390: /* NextStep 2.0 cc is really gcc 1.93 but it defines __GNUC__ = 2 and 391: does not implement __extension__. But that compiler doesn't define 392: __GNUC_MINOR__. */ 393: # if __GNUC__ < 2 || (__NeXT__ && !__GNUC_MINOR__) 394: # define __extension__ 395: # endif 396: 397: # ifndef _INT64_T 398: # define _INT64_T 399: __extension__ typedef long long int64_t; 400: # endif 401: # ifndef _UINT64_T 402: # define _UINT64_T 403: __extension__ typedef unsigned long long uint64_t; 404: # endif 405: 406: #elif !defined __STRICT_ANSI__ 407: # if defined _MSC_VER || defined __WATCOMC__ || defined __BORLANDC__ 408: 409: # ifndef _INT64_T 410: # define _INT64_T 411: typedef __int64 int64_t; 412: # endif 413: # ifndef _UINT64_T 414: # define _UINT64_T 415: typedef unsigned __int64 uint64_t; 416: # endif 417: # endif /* compiler */ 418: 419: #endif /* ANSI version */ 420: EOF 421: fi 422: 423: # ------------- done int64_t types, emit intptr types ------------ 424: if test "$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 $acx_cv_type_intptr_t intptr_t; 433: #endif 434: EOF 435: fi 436: 437: # ------------- done intptr types, emit int_least types ------------ 438: if test "$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 455: EOF 456: fi 457: 458: # ------------- done intptr types, emit int_fast types ------------ 459: if test "$ac_cv_type_int_fast32_t" != yes; then 460: dnl NOTE: The following code assumes that sizeof (int) > 1. 461: dnl Fix when strange machines are reported. 462: sed 's/^ *//' >> tmp-stdint.h <<EOF 463: 464: /* Define int_fast types. short is often slow */ 465: typedef int8_t int_fast8_t; 466: typedef int int_fast16_t; 467: typedef int32_t int_fast32_t; 468: #ifdef _INT64_T 469: typedef int64_t int_fast64_t; 470: #endif 471: 472: typedef uint8_t uint_fast8_t; 473: typedef unsigned int uint_fast16_t; 474: typedef uint32_t uint_fast32_t; 475: #ifdef _UINT64_T 476: typedef uint64_t uint_fast64_t; 477: #endif 478: EOF 479: fi 480: 481: if test "$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 495: EOF 496: fi 497: 498: sed 's/^ *//' >> tmp-stdint.h <<EOF 499: 500: #endif /* GCC_GENERATED_STDINT_H */ 501: EOF 502: 503: if test -r ]_GCC_STDINT_H[ && cmp -s tmp-stdint.h ]_GCC_STDINT_H[; then 504: rm -f tmp-stdint.h 505: else 506: mv -f tmp-stdint.h ]_GCC_STDINT_H[ 507: fi 508: 509: ], [ 510: GCC="$GCC" 511: CC="$CC" 512: acx_cv_header_stdint="$acx_cv_header_stdint" 513: acx_cv_type_int8_t="$acx_cv_type_int8_t" 514: acx_cv_type_int16_t="$acx_cv_type_int16_t" 515: acx_cv_type_int32_t="$acx_cv_type_int32_t" 516: acx_cv_type_int64_t="$acx_cv_type_int64_t" 517: acx_cv_type_intptr_t="$acx_cv_type_intptr_t" 518: ac_cv_type_uintmax_t="$ac_cv_type_uintmax_t" 519: ac_cv_type_uintptr_t="$ac_cv_type_uintptr_t" 520: ac_cv_type_uint64_t="$ac_cv_type_uint64_t" 521: ac_cv_type_u_int64_t="$ac_cv_type_u_int64_t" 522: ac_cv_type_u_int32_t="$ac_cv_type_u_int32_t" 523: ac_cv_type_int_least32_t="$ac_cv_type_int_least32_t" 524: ac_cv_type_int_fast32_t="$ac_cv_type_int_fast32_t" 525: ac_cv_sizeof_void_p="$ac_cv_sizeof_void_p" 526: ]) 527: 528: ])