From eb247ac377623d2a722aab1e6eae7adab5f7ebea Mon Sep 17 00:00:00 2001
From: M Joonas Pihlaja <jpihlaja@cc.helsinki.fi>
Date: Fri, 9 Jul 2010 12:09:07 +0300
Subject: Don't trust OpenBSD's gcc to produce working code for __thread.

The gcc on OpenBSD 4.5 to 4.7 at least produces bad code for __thread,
without as much as a warning.

See PR #6410 "Using __thread TLS variables compiles ok but segfault at runtime."

http://cvs.openbsd.org/cgi-bin/query-pr-wrapper?full=yes&numbers=6410
---
 configure.ac | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/configure.ac b/configure.ac
index b9488d92..3c6f01d5 100644
--- a/configure.ac
+++ b/configure.ac
@@ -531,6 +531,9 @@ AC_LINK_IFELSE([
 #ifdef __MINGW32__
 #error MinGW has broken __thread support
 #endif
+#ifdef __OpenBSD__
+#error OpenBSD has broken __thread support
+#endif
 static __thread int x ;
 int main () { x = 123; return x; }
 ], support_for__thread=yes)
-- 
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