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author | Jing Yu <jingyu@google.com> | 2009-11-05 16:55:30 -0800 |
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committer | Jing Yu <jingyu@google.com> | 2009-11-05 16:55:30 -0800 |
commit | 2cafa61b4b039e5ac3b876fc44a05c61d66df4d4 (patch) | |
tree | 1caaaacd28e00e283dbacd6726db52cbf2d5d909 /binutils-2.19/config/intdiv0.m4 | |
parent | 8d401cf711539af5a2f78d12447341d774892618 (diff) | |
download | toolchain_binutils-2cafa61b4b039e5ac3b876fc44a05c61d66df4d4.zip toolchain_binutils-2cafa61b4b039e5ac3b876fc44a05c61d66df4d4.tar.gz toolchain_binutils-2cafa61b4b039e5ac3b876fc44a05c61d66df4d4.tar.bz2 |
check in binutils sources for prebuilt toolchains in Eclair.
Diffstat (limited to 'binutils-2.19/config/intdiv0.m4')
-rw-r--r-- | binutils-2.19/config/intdiv0.m4 | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/binutils-2.19/config/intdiv0.m4 b/binutils-2.19/config/intdiv0.m4 new file mode 100644 index 0000000..55dddcf --- /dev/null +++ b/binutils-2.19/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.]) +]) |