configure.in: exit with failure

* configure.in (rb_cv_broken_backtrace): exit with failure
  normally, no needs to abort.  [ruby-core:63678] [Bug #10008]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@46796 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,8 @@
+Sun Jul 13 10:56:26 2014  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* configure.in (rb_cv_broken_backtrace): exit with failure
+	  normally, no needs to abort.  [ruby-core:63678] [Bug #10008]
+
 Sat Jul 12 15:10:22 2014  Masaki Suketa <masaki.suketa@nifty.ne.jp>
 
 	* ext/win32ole/win32ole.c (fole_record_method_missing): correct

configure.in

@@ -3050,24 +3050,25 @@ void sigsegv(int signum, siginfo_t *info, void *ctx){
     if (n > 0) {
 	/*fprintf(stdout, "backtrace:%d\n",n);*/
     } else {
-	abort();
+	_exit(EXIT_FAILURE);
     }
-    _exit(0);
+    _exit(EXIT_SUCCESS);
 }
 int
-main()
+main(void)
 {
+    volatile int *a = NULL;
     stack_t ss;
     ss.ss_sp = malloc(SIGSTKSZ);
     if (ss.ss_sp == NULL) {
 	fprintf(stderr, "cannot allocate memory for sigaltstack\n");
-	abort();
+	return EXIT_FAILURE;
     }
     ss.ss_size = SIGSTKSZ;
     ss.ss_flags = 0;
     if (sigaltstack(&ss, NULL) == -1) {
 	fprintf(stderr, "sigaltstack failed\n");
-	abort();
+	return EXIT_FAILURE;
     }
     struct sigaction sa;
     memset(&sa, 0, sizeof(struct sigaction));
@@ -3076,9 +3077,8 @@ main()
     sa.sa_flags |= SA_SIGINFO;
     sa.sa_flags |= SA_ONSTACK;
     sigaction(SIGSEGV, &sa, NULL);
-    int *a = NULL;
     a[0] = 1;
-    return 0;
+    return EXIT_SUCCESS;
 }
 ],
 	rb_cv_broken_backtrace=no,