SlackBuilds.org/desktop/kde-gtk-config/gtkproxies.diff

--- a/gtkproxies/CMakeLists.txt	2017-03-15 19:19:53.000000000 -0400
+++ b/gtkproxies/CMakeLists.txt 2017-03-16 20:21:14.239240865 -0400
@@ -6,7 +6,7 @@
 target_link_libraries(reload_gtk_apps ${GTK2_LIBRARIES})
 install(TARGETS reload_gtk_apps RUNTIME DESTINATION "${KDE4_LIBEXEC_INSTALL_DIR}")
 
-add_definitions(-DDATA_DIR="\\\"${DATA_INSTALL_DIR}/kcm-gtk-module/\\\"")
+add_definitions(-DDATA_DIR=\"${DATA_INSTALL_DIR}/kcm-gtk-module\")
 
 add_executable(gtk_preview preview.c)
 target_link_libraries(gtk_preview ${GTK2_LIBRARIES} ${GTK2_GIOMM_LIBRARY})