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Check if SIGABRT can be trapped multiple times in a row
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Original file line number | Diff line number | Diff line change |
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# SYNOPSIS | ||
# | ||
# AX_CHECK_CATCHABLE_ABRT | ||
# | ||
# DESCRIPTION | ||
# | ||
# Check whether SIGABRT can be caught using signal handlers. | ||
|
||
#serial 1 | ||
|
||
AC_DEFUN([AX_CHECK_CATCHABLE_ABRT], [dnl | ||
AC_PREREQ(2.64) | ||
AS_VAR_PUSHDEF([CACHEVAR], [ax_cv_check_[]_AC_LANG_ABBREV[]CATCHABLE_ABRT])dnl | ||
AC_CACHE_CHECK([whether SIGABRT can be caught when using the _AC_LANG compiler], CACHEVAR, [ | ||
AC_RUN_IFELSE([ | ||
AC_LANG_PROGRAM([[ | ||
#include <signal.h> | ||
#include <stdlib.h> | ||
#ifndef SIGABRT | ||
# error SIGABRT is not defined | ||
#endif | ||
static void sigabrt_handler_3(int _) | ||
{ | ||
exit(0); | ||
} | ||
static void sigabrt_handler_2(int _) | ||
{ | ||
signal(SIGABRT, sigabrt_handler_3); | ||
abort(); | ||
exit(1); | ||
} | ||
static void sigabrt_handler_1(int _) | ||
{ | ||
signal(SIGABRT, sigabrt_handler_2); | ||
abort(); | ||
exit(1); | ||
} | ||
]], [[ | ||
signal(SIGABRT, sigabrt_handler_1); | ||
abort(); | ||
exit(1); | ||
]])], | ||
[AS_VAR_SET(CACHEVAR, [yes])], | ||
[AS_VAR_SET(CACHEVAR, [no])], | ||
[AS_VAR_SET(CACHEVAR, [unknown])] | ||
) | ||
]) | ||
AS_VAR_IF(CACHEVAR, yes, | ||
[AC_DEFINE([HAVE_CATCHABLE_ABRT], [1], [Define if SIGABRT can be caught using signal handlers])], | ||
[AC_MSG_WARN([On this platform, SIGABRT cannot be caught using signal handlers.])] | ||
) | ||
AS_VAR_POPDEF([CACHEVAR])dnl | ||
]) |
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