58d7b41f25
2004-09-22 Kelley Cook <kcook@gcc.gnu.org> * gettext-sister.m4: Renamed from gettext.m4 * codeset.m4, gettext.m4, glibc21.m4, iconv.m4, intdiv0.m4, po.m4, inttypes.m4, inttypes-pri.m4, inttypes_h.m4, lcmessage.m4, lib-ld.m4, lib-link.m4, lib-prefix.m4, nls.m4, progtest.m4, stdint_h.m4, uintmax_t.m4, ulonglong.m4: Import from gettext-0.12.1 sources.
73 lines
1.9 KiB
Plaintext
73 lines
1.9 KiB
Plaintext
# intdiv0.m4 serial 1 (gettext-0.11.3)
|
|
dnl Copyright (C) 2002 Free Software Foundation, Inc.
|
|
dnl This file is free software, distributed under the terms of the GNU
|
|
dnl General Public License. As a special exception to the GNU General
|
|
dnl Public License, this file may be distributed as part of a program
|
|
dnl that contains a configuration script generated by Autoconf, under
|
|
dnl the same distribution terms as the rest of that program.
|
|
|
|
dnl From Bruno Haible.
|
|
|
|
AC_DEFUN([gt_INTDIV0],
|
|
[
|
|
AC_REQUIRE([AC_PROG_CC])dnl
|
|
AC_REQUIRE([AC_CANONICAL_HOST])dnl
|
|
|
|
AC_CACHE_CHECK([whether integer division by zero raises SIGFPE],
|
|
gt_cv_int_divbyzero_sigfpe,
|
|
[
|
|
AC_TRY_RUN([
|
|
#include <stdlib.h>
|
|
#include <signal.h>
|
|
|
|
static void
|
|
#ifdef __cplusplus
|
|
sigfpe_handler (int sig)
|
|
#else
|
|
sigfpe_handler (sig) int sig;
|
|
#endif
|
|
{
|
|
/* Exit with code 0 if SIGFPE, with code 1 if any other signal. */
|
|
exit (sig != SIGFPE);
|
|
}
|
|
|
|
int x = 1;
|
|
int y = 0;
|
|
int z;
|
|
int nan;
|
|
|
|
int main ()
|
|
{
|
|
signal (SIGFPE, sigfpe_handler);
|
|
/* IRIX and AIX (when "xlc -qcheck" is used) yield signal SIGTRAP. */
|
|
#if (defined (__sgi) || defined (_AIX)) && defined (SIGTRAP)
|
|
signal (SIGTRAP, sigfpe_handler);
|
|
#endif
|
|
/* Linux/SPARC yields signal SIGILL. */
|
|
#if defined (__sparc__) && defined (__linux__)
|
|
signal (SIGILL, sigfpe_handler);
|
|
#endif
|
|
|
|
z = x / y;
|
|
nan = y / y;
|
|
exit (1);
|
|
}
|
|
], gt_cv_int_divbyzero_sigfpe=yes, gt_cv_int_divbyzero_sigfpe=no,
|
|
[
|
|
# Guess based on the CPU.
|
|
case "$host_cpu" in
|
|
alpha* | i[34567]86 | m68k | s390*)
|
|
gt_cv_int_divbyzero_sigfpe="guessing yes";;
|
|
*)
|
|
gt_cv_int_divbyzero_sigfpe="guessing no";;
|
|
esac
|
|
])
|
|
])
|
|
case "$gt_cv_int_divbyzero_sigfpe" in
|
|
*yes) value=1;;
|
|
*) value=0;;
|
|
esac
|
|
AC_DEFINE_UNQUOTED(INTDIV0_RAISES_SIGFPE, $value,
|
|
[Define if integer division by zero raises signal SIGFPE.])
|
|
])
|