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|
AC_DEFUN([AC_TYPEOF], [
dnl * first check if we can get the size with redefining typedefs
order="$2"
if test "$2" = ""; then
order="int long long-long"
fi
result=""
visible="unknown"
AC_MSG_CHECKING([type of $1])
AC_CACHE_VAL(i_cv_typeof_$1,[
if test "x$ac_cv_c_compiler_gnu" = "xyes"; then
dnl * try with printf() + -Werror
old_CFLAGS="$CFLAGS"
CFLAGS="$CFLAGS -Werror"
for type in $order; do
case "$type" in
int)
fmt="%d"
;;
unsigned-int)
fmt="%u"
;;
long)
fmt="%ld"
;;
unsigned-long)
fmt="%lu"
;;
long-long)
fmt="%lld"
;;
unsigned-long-long)
fmt="%llu"
;;
*)
fmt=""
;;
esac
if test "$fmt" != ""; then
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
#include <stdio.h>
]], [[
printf("$fmt", ($1)0);
]])],[
if test "$result" != ""; then
dnl * warning check isn't working
result=""
visible="unknown"
break
fi
result="`echo $type|sed 's/-/ /g'`"
visible="$result"
],[])
fi
done
CFLAGS="$old_CFLAGS"
fi
if test "$result" = ""; then
for type in $order; do
type="`echo $type|sed 's/-/ /g'`"
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#include <sys/types.h>
typedef $type $1;
]], [[]])],[
if test "$result" != ""; then
dnl * compiler allows redefining to anything
result=""
visible="unknown"
break
fi
result="$type"
visible="$type"
],[])
done
fi
if test "$result" = ""; then
dnl * check with sizes
dnl * older autoconfs don't include sys/types.h, so do it manually
AC_RUN_IFELSE([AC_LANG_SOURCE([[
#include <stdio.h>
#include <sys/types.h>
int main() {
FILE *f=fopen("conftestval", "w");
if (!f) exit(1);
fprintf(f, "%d\n", sizeof($1));
exit(0);
}
]])],[
size=`cat conftestval`
rm -f conftestval
for type in $order; do
actype="ac_cv_sizeof_`echo $type|sed 's/-/_/g'`"
if test "$size" = "`eval echo \\$$actype`"; then
result="`echo $type|sed 's/-/ /g'`"
visible="`expr $size \* 8`bit (using $result)"
break
fi
done
if test "$result" = ""; then
result=unknown
visible="`expr $size \* 8`bit (unknown type)"
fi
],[],[])
fi
i_cv_typeof_$1=$result/$visible
])
typeof_$1=`echo $i_cv_typeof_$1 | sed s,/.*$,,`
visible=`echo $i_cv_typeof_$1 | sed s,^.*/,,`
AC_MSG_RESULT($visible)
])
|
