$OpenBSD: patch-CMakeLists_txt,v 1.1 2014/03/09 19:53:12 pascal Exp $
--- CMakeLists.txt.orig	Tue Feb 25 16:53:25 2014
+++ CMakeLists.txt	Tue Feb 25 16:53:46 2014
@@ -269,7 +269,9 @@ check_cxx_source_compiles(
 
 if(HAVE_DLFCN_H)
     check_library_exists(dl dlerror "" HAVE_DL)
-    set(DL_LIBRARY "dl")
+    if(HAVE_DL)
+        set(DL_LIBRARY "dl")
+    endif()
 endif()
 
 SET(CMAKE_DEBUG_POSTFIX "d" CACHE STRING "add a postfix, usually 'd' on windows")
