$OpenBSD: patch-ConfigureChecks_cmake,v 1.2 2017/09/21 17:07:52 rsadowski Exp $

Index: ConfigureChecks.cmake
--- ConfigureChecks.cmake.orig
+++ ConfigureChecks.cmake
@@ -205,7 +205,7 @@ check_c_source_compiles("
 __thread int tls;
 
 int main(void) {
-    return 0;
+    return tls;
 }" HAVE_GCC_THREAD_LOCAL_STORAGE)
 
 check_c_source_compiles("
