diff -up ilmbase-1.0.3/IlmBase.pc.in.pkgconfig ilmbase-1.0.3/IlmBase.pc.in
--- ilmbase-1.0.3/IlmBase.pc.in.pkgconfig	2012-07-17 18:27:25.000000000 -0500
+++ ilmbase-1.0.3/IlmBase.pc.in	2012-09-08 11:11:15.913468312 -0500
@@ -9,3 +9,4 @@ Description: Base math and exception lib
 Version: @ILMBASE_VERSION@
 Libs: -L${libdir} -lImath -lHalf -lIex -lIexMath -lIlmThread @PTHREAD_LIBS@
 Cflags: @PTHREAD_CFLAGS@ -I${OpenEXR_includedir}
+Requires.private: gl glu