diff options
Diffstat (limited to 'config/stdint.m4')
| -rw-r--r-- | config/stdint.m4 | 486 |
1 files changed, 486 insertions, 0 deletions
diff --git a/config/stdint.m4 b/config/stdint.m4 new file mode 100644 index 0000000..21ef2ec --- /dev/null +++ b/config/stdint.m4 @@ -0,0 +1,486 @@ +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 uintptr_t)" + for i in stdint.h $inttype_headers; do + 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 <$i>]) + AC_CHECK_TYPE(uint64_t,,[acx_cv_header_stdint_kind="(lacks uintptr_t and uint64_t)"], [#include <sys/types.h> +#include <$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 <$i>]) + AC_CHECK_TYPE(u_int64_t,,[acx_cv_header_stdint_kind="(u_intXX_t style, lacks u_int64_t)"], [#include <sys/types.h> +#include <$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 + typedef unsigned $acx_cv_type_int8_t uint8_t; + #endif + + #ifndef _UINT16_T + #define _UINT16_T + typedef unsigned $acx_cv_type_int16_t uint16_t; + #endif + + #ifndef _UINT32_T + #define _UINT32_T + typedef unsigned $acx_cv_type_int32_t uint32_t; + #endif + + #ifndef _INT8_T + #define _INT8_T + typedef $acx_cv_type_int8_t int8_t; + #endif + + #ifndef _INT16_T + #define _INT16_T + typedef $acx_cv_type_int16_t int16_t; + #endif + + #ifndef _INT32_T + #define _INT32_T + typedef $acx_cv_type_int32_t int32_t; + #endif +EOF +elif test "$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 + typedef u_int8_t uint8_t; + #endif + + #ifndef _UINT16_T + #define _UINT16_T + typedef u_int16_t uint16_t; + #endif + + #ifndef _UINT32_T + #define _UINT32_T + typedef u_int32_t uint32_t; + #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 + typedef u_int64_t uint64_t; + #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 + typedef unsigned $acx_cv_type_int64_t uint64_t; + #endif +EOF +else + sed 's/^ *//' >> tmp-stdint.h <<EOF + + /* some common heuristics for int64_t, using compiler-specific tests */ + #if defined __STDC_VERSION__ && (__STDC_VERSION__-0) >= 199901L + #ifndef _INT64_T + #define _INT64_T + typedef long long int64_t; + #endif + #ifndef _UINT64_T + #define _UINT64_T + typedef unsigned long long uint64_t; + #endif + + #elif defined __GNUC__ && defined (__STDC__) && __STDC__-0 + /* NextStep 2.0 cc is really gcc 1.93 but it defines __GNUC__ = 2 and + does not implement __extension__. But that compiler doesn't define + __GNUC_MINOR__. */ + # if __GNUC__ < 2 || (__NeXT__ && !__GNUC_MINOR__) + # define __extension__ + # endif + + # ifndef _INT64_T + # define _INT64_T + __extension__ typedef long long int64_t; + # endif + # ifndef _UINT64_T + # define _UINT64_T + __extension__ typedef unsigned long long uint64_t; + # endif + + #elif !defined __STRICT_ANSI__ + # if defined _MSC_VER || defined __WATCOMC__ || defined __BORLANDC__ + + # ifndef _INT64_T + # define _INT64_T + typedef __int64 int64_t; + # endif + # ifndef _UINT64_T + # define _UINT64_T + typedef unsigned __int64 uint64_t; + # endif + # endif /* compiler */ + + #endif /* ANSI version */ +EOF +fi + +# ------------- done int64_t types, emit intptr types ------------ +if test "$ac_cv_type_uintptr_t" != yes; then + sed 's/^ *//' >> tmp-stdint.h <<EOF + + /* Define intptr_t based on sizeof(void*) = $ac_cv_sizeof_void_p */ + typedef u$acx_cv_type_intptr_t uintptr_t; + typedef $acx_cv_type_intptr_t intptr_t; +EOF +fi + +# ------------- done intptr types, emit int_least types ------------ +if test "$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" +]) + +]) |