merges r22091 from trunk into ruby_1_9_1.

* signal.c (register_sigaltstack): ignore sigaltstack error.
  It fails on OpenBSD 4.4 when pthread library is linked.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@22517 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 2 deletions

diff --git a/signal.c b/signal.c
index 317537cae5..0845a3df49 100644
--- a/signal.c
+++ b/signal.c
@@ -444,8 +444,7 @@ register_sigaltstack(void)
     newSS.ss_size = ALT_STACK_SIZE;
     newSS.ss_flags = 0;
 
-    if (sigaltstack(&newSS, &oldSS) < 0) 
-	rb_bug("register_sigaltstack. error\n");
+    sigaltstack(&newSS, &oldSS); /* ignore error. */
 }
 #endif