target_include_directories(gtkutil PRIVATE ${GTK${GTK_TARGET}_INCLUDE_DIRS})
target_link_libraries(gtkutil PRIVATE ${GTK${GTK_TARGET}_LIBRARIES})
-find_package(GtkGLExt REQUIRED)
-target_include_directories(gtkutil PRIVATE ${GTKGL_INCLUDE_DIRS})
-target_link_libraries(gtkutil PRIVATE ${GTKGL_LIBRARIES})
+if (GTK_TARGET EQUAL 2)
+ find_package(GtkGLExt REQUIRED)
+ target_include_directories(gtkutil PRIVATE ${GtkGLExt_INCLUDE_DIRS})
+ target_link_libraries(gtkutil PRIVATE ${GtkGLExt_LIBRARIES})
+endif ()