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-rw-r--r--tools/missing-macros/src/m4/intdiv0.m484
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diff --git a/tools/missing-macros/src/m4/intdiv0.m4 b/tools/missing-macros/src/m4/intdiv0.m4
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+# intdiv0.m4 serial 3 (gettext-0.18)
+dnl Copyright (C) 2002, 2007-2010 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+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,
+ [
+ gt_cv_int_divbyzero_sigfpe=
+changequote(,)dnl
+ case "$host_os" in
+ macos* | darwin[6-9]* | darwin[1-9][0-9]*)
+ # On MacOS X 10.2 or newer, just assume the same as when cross-
+ # compiling. If we were to perform the real test, 1 Crash Report
+ # dialog window would pop up.
+ case "$host_cpu" in
+ i[34567]86 | x86_64)
+ gt_cv_int_divbyzero_sigfpe="guessing yes" ;;
+ esac
+ ;;
+ esac
+changequote([,])dnl
+ if test -z "$gt_cv_int_divbyzero_sigfpe"; then
+ AC_TRY_RUN([
+#include <stdlib.h>
+#include <signal.h>
+
+static void
+sigfpe_handler (int sig)
+{
+ /* Exit with code 0 if SIGFPE, with code 1 if any other signal. */
+ exit (sig != SIGFPE);
+}
+
+int x = 1;
+int y = 0;
+int z;
+int nan;
+
+int main ()
+{
+ signal (SIGFPE, sigfpe_handler);
+/* IRIX and AIX (when "xlc -qcheck" is used) yield signal SIGTRAP. */
+#if (defined (__sgi) || defined (_AIX)) && defined (SIGTRAP)
+ signal (SIGTRAP, sigfpe_handler);
+#endif
+/* Linux/SPARC yields signal SIGILL. */
+#if defined (__sparc__) && defined (__linux__)
+ signal (SIGILL, sigfpe_handler);
+#endif
+
+ z = x / y;
+ nan = y / y;
+ exit (1);
+}
+], [gt_cv_int_divbyzero_sigfpe=yes], [gt_cv_int_divbyzero_sigfpe=no],
+ [
+ # Guess based on the CPU.
+changequote(,)dnl
+ case "$host_cpu" in
+ alpha* | i[34567]86 | x86_64 | m68k | s390*)
+ gt_cv_int_divbyzero_sigfpe="guessing yes";;
+ *)
+ gt_cv_int_divbyzero_sigfpe="guessing no";;
+ esac
+changequote([,])dnl
+ ])
+ fi
+ ])
+ 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.])
+])