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| author | DJ Delorie <dj@delorie.com> | 2004-09-23 19:43:47 +0000 |
|---|---|---|
| committer | DJ Delorie <dj@delorie.com> | 2004-09-23 19:43:47 +0000 |
| commit | b950f12782a8f86cf0530c4777ee1ffb86ab27f9 (patch) | |
| tree | d274bfec3d3497a719a8f7b6a998f3f57fc2dd5f /config/intdiv0.m4 | |
| parent | 190e2f916b9658702ad050cffae35f287bb6753e (diff) | |
| download | gdb-b950f12782a8f86cf0530c4777ee1ffb86ab27f9.tar.gz | |
Merge from gcc
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.
Diffstat (limited to 'config/intdiv0.m4')
| -rw-r--r-- | config/intdiv0.m4 | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/config/intdiv0.m4 b/config/intdiv0.m4 new file mode 100644 index 00000000000..55dddcf1c24 --- /dev/null +++ b/config/intdiv0.m4 @@ -0,0 +1,72 @@ +# 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.]) +]) |