$OpenBSD: patch-configure,v 1.1 2009/08/07 10:46:41 jasper Exp $

use '-pthread' instead of '-lpthread'

--- configure.orig	Thu Jul  9 21:13:05 2009
+++ configure	Fri Aug  7 12:40:00 2009
@@ -5982,12 +5982,12 @@ return pthread_create ();
   return 0;
 }
 _ACEOF
-for ac_lib in '' pthread; do
+for ac_lib in pthread; do
   if test -z "$ac_lib"; then
     ac_res="none required"
   else
-    ac_res=-l$ac_lib
-    LIBS="-l$ac_lib  $ac_func_search_save_LIBS"
+    ac_res=-$ac_lib
+    LIBS="-$ac_lib  $ac_func_search_save_LIBS"
   fi
   rm -f conftest.$ac_objext conftest$ac_exeext
 if { (ac_try="$ac_link"
