ref: 4e927e2184be8ee36d8fc0766bab1479dc0f6c4d
dir: /aclocal.m4/
AC_DEFUN([AC_COMPILE_CHECK_SIZEOF],
[changequote(<<, >>)dnl
dnl The name to #define.
define(<<AC_TYPE_NAME>>, translit(sizeof_$1, [a-z *], [A-Z_P]))dnl
dnl The cache variable name.
define(<<AC_CV_NAME>>, translit(ac_cv_sizeof_$1, [ *], [_p]))dnl
changequote([, ])dnl
AC_MSG_CHECKING(size of $1)
AC_CACHE_VAL(AC_CV_NAME,
[for ac_size in 4 8 1 2 16 $2 ; do # List sizes in rough order of prevalence.
AC_TRY_COMPILE([#include "confdefs.h"
#include <sys/types.h>
$2
], [switch (0) case 0: case (sizeof ($1) == $ac_size):;], AC_CV_NAME=$ac_size)
if test x$AC_CV_NAME != x ; then break; fi
done
])
if test x$AC_CV_NAME = x ; then
AC_MSG_ERROR([cannot determine a size for $1])
fi
AC_MSG_RESULT($AC_CV_NAME)
AC_DEFINE_UNQUOTED(AC_TYPE_NAME, $AC_CV_NAME, [The number of bytes in type $1])
undefine([AC_TYPE_NAME])dnl
undefine([AC_CV_NAME])dnl
])
AC_DEFUN(AC_CHECK_TYPEDEF_,
[dnl
ac_lib_var=`echo $1['_']$2 | sed 'y%./+-%__p_%'`
AC_CACHE_VAL(ac_cv_lib_$ac_lib_var,
[ eval "ac_cv_type_$ac_lib_var='not-found'"
ac_cv_check_typedef_header=`echo ifelse([$2], , stddef.h, $2)`
AC_TRY_COMPILE( [#include <$ac_cv_check_typedef_header>],
[int x = sizeof($1); x = x;],
eval "ac_cv_type_$ac_lib_var=yes" ,
eval "ac_cv_type_$ac_lib_var=no" )
if test `eval echo '$ac_cv_type_'$ac_lib_var` = "no" ; then
ifelse([$4], , :, $4)
else
ifelse([$3], , :, $3)
fi
])])
dnl AC_CHECK_TYPEDEF(TYPEDEF, HEADER [, ACTION-IF-FOUND,
dnl [, ACTION-IF-NOT-FOUND ]])
AC_DEFUN(AC_CHECK_TYPEDEF,
[dnl
AC_MSG_CHECKING([for $1 in $2])
AC_CHECK_TYPEDEF_($1,$2,AC_MSG_RESULT(yes),AC_MSG_RESULT(no))dnl
])
AC_DEFUN([AC_NEED_STDINT_H],
[AC_MSG_CHECKING([for stdint-types])
ac_cv_header_stdint="no-file"
ac_cv_header_stdint_u="no-file"
for i in $1 inttypes.h sys/inttypes.h sys/int_types.h stdint.h ; do
AC_CHECK_TYPEDEF_(uint32_t, $i, [ac_cv_header_stdint=$i])
done
for i in $1 sys/types.h inttypes.h sys/inttypes.h sys/int_types.h ; do
AC_CHECK_TYPEDEF_(u_int32_t, $i, [ac_cv_header_stdint_u=$i])
done
dnl debugging: __AC_MSG( !$ac_cv_header_stdint!$ac_cv_header_stdint_u! ...)
ac_stdint_h=`echo ifelse($1, , stdint.h, $1)`
if test "$ac_cv_header_stdint" != "no-file" ; then
if test "$ac_cv_header_stdint" != "$ac_stdint_h" ; then
AC_MSG_RESULT(found in $ac_cv_header_stdint)
echo "#include <$ac_cv_header_stdint>" >$ac_stdint_h
AC_MSG_RESULT(creating $ac_stdint_h - (just to include $ac_cv_header_stdint) )
else
AC_MSG_RESULT(found in $ac_stdint_h)
fi
ac_cv_header_stdint_generated=false
elif test "$ac_cv_header_stdint_u" != "no-file" ; then
AC_MSG_RESULT(found u_types in $ac_cv_header_stdint_u)
if test $ac_cv_header_stdint = "$ac_stdint_h" ; then
AC_MSG_RESULT(creating $ac_stdint_h - includes $ac_cv_header_stdint, expect problems!)
else
AC_MSG_RESULT(creating $ac_stdint_h - (include inet-types in $ac_cv_header_stdint_u and re-typedef))
fi
cat >$ac_stdint_h <<EOF
#ifndef __AC_STDINT_H
#define __AC_STDINT_H 1
#include <stddef.h>
#include <$ac_cv_header_stdint_u>
/* int8_t int16_t int32_t defined by inet code */
typedef u_int8_t uint8_t;
typedef u_int16_t uint16_t;
typedef u_int32_t uint32_t;
/* it's a networkable system, but without any stdint.h */
/* hence it's an older 32-bit system... (a wild guess that seems to work) */
typedef u_int32_t uintptr_t;
typedef int32_t intptr_t;
EOF
ac_cv_header_stdint_generated=true
else
AC_MSG_RESULT(not found, need to guess the types now... )
AC_COMPILE_CHECK_SIZEOF(long, 32)
AC_COMPILE_CHECK_SIZEOF(void*, 32)
AC_MSG_RESULT( creating $ac_stdint_h - using detected values for sizeof long and sizeof void* )
cat >$ac_stdint_h <<EOF
#ifndef __AC_STDINT_H
#define __AC_STDINT_H 1
/* ISO C 9X: 7.18 Integer types <stdint.h> */
#define __int8_t_defined
typedef signed char int8_t;
typedef unsigned char uint8_t;
typedef signed short int16_t;
typedef unsigned short uint16_t;
EOF
if test "$ac_cv_sizeof_long" = "64" ; then
cat >>$ac_stdint_h <<EOF
typedef signed int int32_t;
typedef unsigned int uint32_t;
typedef signed long int64_t;
typedef unsigned long uint64_t;
#define int64_t int64_t
#define uint64_t uint64_t
EOF
else
cat >>$ac_stdint_h <<EOF
typedef signed long int32_t;
typedef unsigned long uint32_t;
EOF
fi
if test "$ac_cv_sizeof_long" != "$ac_cv_sizeof_voidp" ; then
cat >>$ac_stdint_h <<EOF
typedef signed int intptr_t;
typedef unsigned int uintptr_t;
EOF
else
cat >>$ac_stdint_h <<EOF
typedef signed long intptr_t;
typedef unsigned long uintptr_t;
EOF
ac_cv_header_stdint_generated=true
fi
fi
if "$ac_cv_header_stdint_generated" ; then
cat >>$ac_stdint_h <<EOF
typedef int8_t int_least8_t;
typedef int16_t int_least16_t;
typedef int32_t int_least32_t;
typedef uint8_t uint_least8_t;
typedef uint16_t uint_least16_t;
typedef uint32_t uint_least32_t;
typedef int8_t int_fast8_t;
typedef int32_t int_fast16_t;
typedef int32_t int_fast32_t;
typedef uint8_t uint_fast8_t;
typedef uint32_t uint_fast16_t;
typedef uint32_t uint_fast32_t;
typedef long int intmax_t;
typedef unsigned long uintmax_t;
#endif
EOF
fi dnl
])