diff options
Diffstat (limited to 'gl/m4/intdiv0.m4')
-rw-r--r-- | gl/m4/intdiv0.m4 | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/gl/m4/intdiv0.m4 b/gl/m4/intdiv0.m4 new file mode 100644 index 00000000..b8d78176 --- /dev/null +++ b/gl/m4/intdiv0.m4 | |||
@@ -0,0 +1,70 @@ | |||
1 | # intdiv0.m4 serial 1 (gettext-0.11.3) | ||
2 | dnl Copyright (C) 2002 Free Software Foundation, Inc. | ||
3 | dnl This file is free software; the Free Software Foundation | ||
4 | dnl gives unlimited permission to copy and/or distribute it, | ||
5 | dnl with or without modifications, as long as this notice is preserved. | ||
6 | |||
7 | dnl From Bruno Haible. | ||
8 | |||
9 | AC_DEFUN([gt_INTDIV0], | ||
10 | [ | ||
11 | AC_REQUIRE([AC_PROG_CC])dnl | ||
12 | AC_REQUIRE([AC_CANONICAL_HOST])dnl | ||
13 | |||
14 | AC_CACHE_CHECK([whether integer division by zero raises SIGFPE], | ||
15 | gt_cv_int_divbyzero_sigfpe, | ||
16 | [ | ||
17 | AC_TRY_RUN([ | ||
18 | #include <stdlib.h> | ||
19 | #include <signal.h> | ||
20 | |||
21 | static void | ||
22 | #ifdef __cplusplus | ||
23 | sigfpe_handler (int sig) | ||
24 | #else | ||
25 | sigfpe_handler (sig) int sig; | ||
26 | #endif | ||
27 | { | ||
28 | /* Exit with code 0 if SIGFPE, with code 1 if any other signal. */ | ||
29 | exit (sig != SIGFPE); | ||
30 | } | ||
31 | |||
32 | int x = 1; | ||
33 | int y = 0; | ||
34 | int z; | ||
35 | int nan; | ||
36 | |||
37 | int main () | ||
38 | { | ||
39 | signal (SIGFPE, sigfpe_handler); | ||
40 | /* IRIX and AIX (when "xlc -qcheck" is used) yield signal SIGTRAP. */ | ||
41 | #if (defined (__sgi) || defined (_AIX)) && defined (SIGTRAP) | ||
42 | signal (SIGTRAP, sigfpe_handler); | ||
43 | #endif | ||
44 | /* Linux/SPARC yields signal SIGILL. */ | ||
45 | #if defined (__sparc__) && defined (__linux__) | ||
46 | signal (SIGILL, sigfpe_handler); | ||
47 | #endif | ||
48 | |||
49 | z = x / y; | ||
50 | nan = y / y; | ||
51 | exit (1); | ||
52 | } | ||
53 | ], gt_cv_int_divbyzero_sigfpe=yes, gt_cv_int_divbyzero_sigfpe=no, | ||
54 | [ | ||
55 | # Guess based on the CPU. | ||
56 | case "$host_cpu" in | ||
57 | alpha* | i[34567]86 | m68k | s390*) | ||
58 | gt_cv_int_divbyzero_sigfpe="guessing yes";; | ||
59 | *) | ||
60 | gt_cv_int_divbyzero_sigfpe="guessing no";; | ||
61 | esac | ||
62 | ]) | ||
63 | ]) | ||
64 | case "$gt_cv_int_divbyzero_sigfpe" in | ||
65 | *yes) value=1;; | ||
66 | *) value=0;; | ||
67 | esac | ||
68 | AC_DEFINE_UNQUOTED(INTDIV0_RAISES_SIGFPE, $value, | ||
69 | [Define if integer division by zero raises signal SIGFPE.]) | ||
70 | ]) | ||