tildefriends/deps/libsodium/m4/ax_check_catchable_abrt.m4

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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], 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
])