$OpenBSD: patch-vcl_Library_vclplug_gtk3_mk,v 1.3 2016/03/01 21:39:58 robert Exp $
--- vcl/Library_vclplug_gtk3.mk.orig.port	Wed Jan 27 01:58:25 2016
+++ vcl/Library_vclplug_gtk3.mk	Wed Feb 10 14:23:02 2016
@@ -114,10 +114,10 @@ $(eval $(call gb_Library_add_exception_objects,vclplug
     vcl/unx/gtk3/gtk3hudawareness \
 ))
 
-ifeq ($(OS),LINUX)
+ifneq (,$(filter LINUX OPENBSD,$(OS)))
 $(eval $(call gb_Library_add_libs,vclplug_gtk3,\
 	-lm \
-	-ldl \
+	$(if $(filter LINUX,$(OS)),-ldl) \
 	-lpthread \
 ))
 endif
