+if HAVE_FRAMEWORK_PLIB
+fgfs_PLIB_FW = $(plib_FRAMEWORK)
+metar_PLIB_FW = $(plib_FRAMEWORK)
+else
+fgfs_PLIB_LIBS = -lplibpuaux -lplibpu -lplibfnt -lplibjs -lplibnet \
+ -lplibsg -lplibul
+metar_PLIB_LIBS = -lplibnet -lplibul
+endif
+
+if HAVE_FRAMEWORK_OSG
+fgfs_OSG_FW = $(osg_FRAMEWORKS) $(openthreads_FRAMEWORK)
+endif
+
+GFX_CODE = fg_os_osgviewer.cxx fg_os_common.cxx fg_os.hxx
+