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)

])