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dnl @synopsis GCC_HEADER_STDINT [( HEADER-TO-GENERATE [, HEADERS-TO-CHECK])] dnl dnl the "ISO C9X: 7.18 Integer types <stdint.h>" section requires the dnl existence of an include file <stdint.h> that defines a set of dnl typedefs, especially uint8_t,int32_t,uintptr_t. dnl Many older installations will not provide this file, but some will dnl have the very same definitions in <inttypes.h>. In other enviroments dnl we can use the inet-types in <sys/types.h> which would define the dnl typedefs int8_t and u_int8_t respectivly. dnl dnl This macros will create a local "_stdint.h" or the headerfile given as dnl an argument. In many cases that file will pick the definition from a dnl "#include <stdint.h>" or "#include <inttypes.h>" statement, while dnl in other environments it will provide the set of basic 'stdint's defined: dnl int8_t,uint8_t,int16_t,uint16_t,int32_t,uint32_t,intptr_t,uintptr_t dnl int_least32_t.. int_fast32_t.. intmax_t dnl which may or may not rely on the definitions of other files. dnl dnl Sometimes the stdint.h or inttypes.h headers conflict with sys/types.h, dnl so we test the headers together with sys/types.h and always include it dnl into the generated header (to match the tests with the generated file). dnl Hopefully this is not a big annoyance. dnl dnl If your installed header files require the stdint-types you will want to dnl create an installable file mylib-int.h that all your other installable dnl header may include. So, for a library package named "mylib", just use dnl GCC_HEADER_STDINT(mylib-int.h) dnl in configure.in and install that header file in Makefile.am along with dnl the other headers (mylib.h). The mylib-specific headers can simply dnl use "#include <mylib-int.h>" to obtain the stdint-types. dnl dnl Remember, if the system already had a valid <stdint.h>, the generated dnl file will include it directly. No need for fuzzy HAVE_STDINT_H things... dnl dnl @author Guido Draheim <guidod@gmx.de>, Paolo Bonzini <bonzini@gnu.org> AC_DEFUN([GCC_HEADER_STDINT], [m4_define(_GCC_STDINT_H, m4_ifval($1, $1, _stdint.h)) inttype_headers=`echo inttypes.h sys/inttypes.h $2 | sed -e 's/,/ /g'` acx_cv_header_stdint=stddef.h acx_cv_header_stdint_kind="(already complete)" for i in stdint.h $inttype_headers; do unset ac_cv_type_uintptr_t unset ac_cv_type_uintmax_t unset ac_cv_type_int_least32_t unset ac_cv_type_int_fast32_t unset ac_cv_type_uint64_t _AS_ECHO_N([looking for a compliant stdint.h in $i, ]) AC_CHECK_TYPE(uintmax_t,[acx_cv_header_stdint=$i],continue,[#include <sys/types.h> #include <$i>]) AC_CHECK_TYPE(uintptr_t,,[acx_cv_header_stdint_kind="(mostly complete)"], [#include <sys/types.h> #include <$i>]) AC_CHECK_TYPE(int_least32_t,,[acx_cv_header_stdint_kind="(mostly complete)"], [#include <sys/types.h> #include <$i>]) AC_CHECK_TYPE(int_fast32_t,,[acx_cv_header_stdint_kind="(mostly complete)"], [#include <sys/types.h> #include <$i>]) AC_CHECK_TYPE(uint64_t,,[acx_cv_header_stdint_kind="(lacks uint64_t)"], [#include <sys/types.h> #include <$i>]) break done if test "$acx_cv_header_stdint" = stddef.h; then acx_cv_header_stdint_kind="(lacks uintmax_t)" for i in stdint.h $inttype_headers; do unset ac_cv_type_uintptr_t unset ac_cv_type_uint32_t unset ac_cv_type_uint64_t _AS_ECHO_N([looking for an incomplete stdint.h in $i, ]) AC_CHECK_TYPE(uint32_t,[acx_cv_header_stdint=$i],continue,[#include <sys/types.h> #include <$i>]) AC_CHECK_TYPE(uint64_t,,,[#include <sys/types.h> #include <$i>]) AC_CHECK_TYPE(uintptr_t,,,[#include <sys/types.h> #include <$i>]) break done fi if test "$acx_cv_header_stdint" = stddef.h; then acx_cv_header_stdint_kind="(u_intXX_t style)" for i in sys/types.h $inttype_headers; do unset ac_cv_type_u_int32_t unset ac_cv_type_u_int64_t _AS_ECHO_N([looking for u_intXX_t types in $i, ]) AC_CHECK_TYPE(u_int32_t,[acx_cv_header_stdint=$i],continue,[#include <sys/types.h> #include <$i>]) AC_CHECK_TYPE(u_int64_t,,,[#include <sys/types.h> #include <$i>]) break done fi if test "$acx_cv_header_stdint" = stddef.h; then acx_cv_header_stdint_kind="(using manual detection)" fi test -z "$ac_cv_type_uintptr_t" && ac_cv_type_uintptr_t=no test -z "$ac_cv_type_uint64_t" && ac_cv_type_uint64_t=no test -z "$ac_cv_type_u_int64_t" && ac_cv_type_u_int64_t=no test -z "$ac_cv_type_int_least32_t" && ac_cv_type_int_least32_t=no test -z "$ac_cv_type_int_fast32_t" && ac_cv_type_int_fast32_t=no # ----------------- Summarize what we found so far AC_MSG_CHECKING([what to include in _GCC_STDINT_H]) case `AS_BASENAME(_GCC_STDINT_H)` in stdint.h) AC_MSG_WARN([are you sure you want it there?]) ;; inttypes.h) AC_MSG_WARN([are you sure you want it there?]) ;; *) ;; esac AC_MSG_RESULT($acx_cv_header_stdint $acx_cv_header_stdint_kind) # ----------------- done included file, check C basic types -------- # Lacking an uintptr_t? Test size of void * case "$acx_cv_header_stdint:$ac_cv_type_uintptr_t" in stddef.h:* | *:no) AC_CHECK_SIZEOF(void *) ;; esac # Lacking an uint64_t? Test size of long case "$acx_cv_header_stdint:$ac_cv_type_uint64_t:$ac_cv_type_u_int64_t" in stddef.h:*:* | *:no:no) AC_CHECK_SIZEOF(long) ;; esac if test $acx_cv_header_stdint = stddef.h; then # Lacking a good header? Test size of everything and deduce all types. AC_CHECK_SIZEOF(int) AC_CHECK_SIZEOF(short) AC_CHECK_SIZEOF(char) AC_MSG_CHECKING(for type equivalent to int8_t) case "$ac_cv_sizeof_char" in 1) acx_cv_type_int8_t=char ;; *) AC_MSG_ERROR(no 8-bit type, please report a bug) esac AC_MSG_RESULT($acx_cv_type_int8_t) AC_MSG_CHECKING(for type equivalent to int16_t) case "$ac_cv_sizeof_int:$ac_cv_sizeof_short" in 2:*) acx_cv_type_int16_t=int ;; *:2) acx_cv_type_int16_t=short ;; *) AC_MSG_ERROR(no 16-bit type, please report a bug) esac AC_MSG_RESULT($acx_cv_type_int16_t) AC_MSG_CHECKING(for type equivalent to int32_t) case "$ac_cv_sizeof_int:$ac_cv_sizeof_long" in 4:*) acx_cv_type_int32_t=int ;; *:4) acx_cv_type_int32_t=long ;; *) AC_MSG_ERROR(no 32-bit type, please report a bug) esac AC_MSG_RESULT($acx_cv_type_int32_t) fi # These tests are here to make the output prettier if test "$ac_cv_type_uint64_t" != yes && test "$ac_cv_type_u_int64_t" != yes; then case "$ac_cv_sizeof_long" in 8) acx_cv_type_int64_t=long ;; esac AC_MSG_CHECKING(for type equivalent to int64_t) AC_MSG_RESULT(${acx_cv_type_int64_t-'using preprocessor symbols'}) fi # Now we can use the above types if test "$ac_cv_type_uintptr_t" != yes; then AC_MSG_CHECKING(for type equivalent to intptr_t) case $ac_cv_sizeof_void_p in 2) acx_cv_type_intptr_t=int16_t ;; 4) acx_cv_type_intptr_t=int32_t ;; 8) acx_cv_type_intptr_t=int64_t ;; *) AC_MSG_ERROR(no equivalent for intptr_t, please report a bug) esac AC_MSG_RESULT($acx_cv_type_intptr_t) fi # ----------------- done all checks, emit header ------------- AC_CONFIG_COMMANDS(_GCC_STDINT_H, [ if test "$GCC" = yes; then echo "/* generated for " `$CC --version | sed 1q` "*/" > tmp-stdint.h else echo "/* generated for $CC */" > tmp-stdint.h fi sed 's/^ *//' >> tmp-stdint.h <<EOF #ifndef GCC_GENERATED_STDINT_H #define GCC_GENERATED_STDINT_H 1 #include <sys/types.h> EOF if test "$acx_cv_header_stdint" != stdint.h; then echo "#include <stddef.h>" >> tmp-stdint.h fi if test "$acx_cv_header_stdint" != stddef.h; then echo "#include <$acx_cv_header_stdint>" >> tmp-stdint.h fi sed 's/^ *//' >> tmp-stdint.h <<EOF /* glibc uses these symbols as guards to prevent redefinitions. */ #ifdef __int8_t_defined #define _INT8_T #define _INT16_T #define _INT32_T #endif #ifdef __uint32_t_defined #define _UINT32_T #endif EOF # ----------------- done header, emit basic int types ------------- if test "$acx_cv_header_stdint" = stddef.h; then sed 's/^ *//' >> tmp-stdint.h <<EOF #ifndef _UINT8_T #define _UINT8_T #ifndef __uint8_t_defined #define __uint8_t_defined typedef unsigned $acx_cv_type_int8_t uint8_t; #endif #endif #ifndef _UINT16_T #define _UINT16_T #ifndef __uint16_t_defined #define __uint16_t_defined typedef unsigned $acx_cv_type_int16_t uint16_t; #endif #endif #ifndef _UINT32_T #define _UINT32_T #ifndef __uint32_t_defined #define __uint32_t_defined typedef unsigned $acx_cv_type_int32_t uint32_t; #endif #endif #ifndef _INT8_T #define _INT8_T #ifndef __int8_t_defined #define __int8_t_defined typedef $acx_cv_type_int8_t int8_t; #endif #endif #ifndef _INT16_T #define _INT16_T #ifndef __int16_t_defined #define __int16_t_defined typedef $acx_cv_type_int16_t int16_t; #endif #endif #ifndef _INT32_T #define _INT32_T #ifndef __int32_t_defined #define __int32_t_defined typedef $acx_cv_type_int32_t int32_t; #endif #endif EOF elif test "$ac_cv_type_u_int32_t" = yes; then sed 's/^ *//' >> tmp-stdint.h <<EOF /* int8_t int16_t int32_t defined by inet code, we do the u_intXX types */ #ifndef _INT8_T #define _INT8_T #endif #ifndef _INT16_T #define _INT16_T #endif #ifndef _INT32_T #define _INT32_T #endif #ifndef _UINT8_T #define _UINT8_T #ifndef __uint8_t_defined #define __uint8_t_defined typedef u_int8_t uint8_t; #endif #endif #ifndef _UINT16_T #define _UINT16_T #ifndef __uint16_t_defined #define __uint16_t_defined typedef u_int16_t uint16_t; #endif #endif #ifndef _UINT32_T #define _UINT32_T #ifndef __uint32_t_defined #define __uint32_t_defined typedef u_int32_t uint32_t; #endif #endif EOF else sed 's/^ *//' >> tmp-stdint.h <<EOF /* Some systems have guard macros to prevent redefinitions, define them. */ #ifndef _INT8_T #define _INT8_T #endif #ifndef _INT16_T #define _INT16_T #endif #ifndef _INT32_T #define _INT32_T #endif #ifndef _UINT8_T #define _UINT8_T #endif #ifndef _UINT16_T #define _UINT16_T #endif #ifndef _UINT32_T #define _UINT32_T #endif EOF fi # ------------- done basic int types, emit int64_t types ------------ if test "$ac_cv_type_uint64_t" = yes; then sed 's/^ *//' >> tmp-stdint.h <<EOF /* system headers have good uint64_t and int64_t */ #ifndef _INT64_T #define _INT64_T #endif #ifndef _UINT64_T #define _UINT64_T #endif EOF elif test "$ac_cv_type_u_int64_t" = yes; then sed 's/^ *//' >> tmp-stdint.h <<EOF /* system headers have an u_int64_t (and int64_t) */ #ifndef _INT64_T #define _INT64_T #endif #ifndef _UINT64_T #define _UINT64_T #ifndef __uint64_t_defined #define __uint64_t_defined typedef u_int64_t uint64_t; #endif #endif EOF elif test -n "$acx_cv_type_int64_t"; then sed 's/^ *//' >> tmp-stdint.h <<EOF /* architecture has a 64-bit type, $acx_cv_type_int64_t */ #ifndef _INT64_T #define _INT64_T typedef $acx_cv_type_int64_t int64_t; #endif #ifndef _UINT64_T #define _UINT64_T #ifndef __uint64_t_defined #define __uint64_t_defined typedef unsigned $acx_cv_type_int64_t uint64_t; #endif #endif EOF else sed 's/^ *//' >> tmp-stdint.h <<EOF /* some common heuristics for int64_t, using compiler-specific tests */ #if defined __STDC_VERSION__ && (__STDC_VERSION__-0) >= 199901L #ifndef _INT64_T #define _INT64_T #ifndef __int64_t_defined typedef long long int64_t; #endif #endif #ifndef _UINT64_T #define _UINT64_T typedef unsigned long long uint64_t; #endif #elif defined __GNUC__ && defined (__STDC__) && __STDC__-0 /* NextStep 2.0 cc is really gcc 1.93 but it defines __GNUC__ = 2 and does not implement __extension__. But that compiler doesn't define __GNUC_MINOR__. */ # if __GNUC__ < 2 || (__NeXT__ && !__GNUC_MINOR__) # define __extension__ # endif # ifndef _INT64_T # define _INT64_T __extension__ typedef long long int64_t; # endif # ifndef _UINT64_T # define _UINT64_T __extension__ typedef unsigned long long uint64_t; # endif #elif !defined __STRICT_ANSI__ # if defined _MSC_VER || defined __WATCOMC__ || defined __BORLANDC__ # ifndef _INT64_T # define _INT64_T typedef __int64 int64_t; # endif # ifndef _UINT64_T # define _UINT64_T typedef unsigned __int64 uint64_t; # endif # endif /* compiler */ #endif /* ANSI version */ EOF fi # ------------- done int64_t types, emit intptr types ------------ if test "$ac_cv_type_uintptr_t" != yes; then sed 's/^ *//' >> tmp-stdint.h <<EOF /* Define intptr_t based on sizeof(void*) = $ac_cv_sizeof_void_p */ #ifndef __uintptr_t_defined typedef u$acx_cv_type_intptr_t uintptr_t; #endif #ifndef __intptr_t_defined typedef $acx_cv_type_intptr_t intptr_t; #endif EOF fi # ------------- done intptr types, emit int_least types ------------ if test "$ac_cv_type_int_least32_t" != yes; then sed 's/^ *//' >> tmp-stdint.h <<EOF /* Define int_least types */ typedef int8_t int_least8_t; typedef int16_t int_least16_t; typedef int32_t int_least32_t; #ifdef _INT64_T typedef int64_t int_least64_t; #endif typedef uint8_t uint_least8_t; typedef uint16_t uint_least16_t; typedef uint32_t uint_least32_t; #ifdef _UINT64_T typedef uint64_t uint_least64_t; #endif EOF fi # ------------- done intptr types, emit int_fast types ------------ if test "$ac_cv_type_int_fast32_t" != yes; then dnl NOTE: The following code assumes that sizeof (int) > 1. dnl Fix when strange machines are reported. sed 's/^ *//' >> tmp-stdint.h <<EOF /* Define int_fast types. short is often slow */ typedef int8_t int_fast8_t; typedef int int_fast16_t; typedef int32_t int_fast32_t; #ifdef _INT64_T typedef int64_t int_fast64_t; #endif typedef uint8_t uint_fast8_t; typedef unsigned int uint_fast16_t; typedef uint32_t uint_fast32_t; #ifdef _UINT64_T typedef uint64_t uint_fast64_t; #endif EOF fi if test "$ac_cv_type_uintmax_t" != yes; then sed 's/^ *//' >> tmp-stdint.h <<EOF /* Define intmax based on what we found */ #ifdef _INT64_T typedef int64_t intmax_t; #else typedef long intmax_t; #endif #ifdef _UINT64_T typedef uint64_t uintmax_t; #else typedef unsigned long uintmax_t; #endif EOF fi sed 's/^ *//' >> tmp-stdint.h <<EOF #endif /* GCC_GENERATED_STDINT_H */ EOF if test -r ]_GCC_STDINT_H[ && cmp -s tmp-stdint.h ]_GCC_STDINT_H[; then rm -f tmp-stdint.h else mv -f tmp-stdint.h ]_GCC_STDINT_H[ fi ], [ GCC="$GCC" CC="$CC" acx_cv_header_stdint="$acx_cv_header_stdint" acx_cv_type_int8_t="$acx_cv_type_int8_t" acx_cv_type_int16_t="$acx_cv_type_int16_t" acx_cv_type_int32_t="$acx_cv_type_int32_t" acx_cv_type_int64_t="$acx_cv_type_int64_t" acx_cv_type_intptr_t="$acx_cv_type_intptr_t" ac_cv_type_uintmax_t="$ac_cv_type_uintmax_t" ac_cv_type_uintptr_t="$ac_cv_type_uintptr_t" ac_cv_type_uint64_t="$ac_cv_type_uint64_t" ac_cv_type_u_int64_t="$ac_cv_type_u_int64_t" ac_cv_type_u_int32_t="$ac_cv_type_u_int32_t" ac_cv_type_int_least32_t="$ac_cv_type_int_least32_t" ac_cv_type_int_fast32_t="$ac_cv_type_int_fast32_t" ac_cv_sizeof_void_p="$ac_cv_sizeof_void_p" ]) ])
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