ENH: Added BUILD_FLTK_GUI option (defaults to ON).

Source/CMakeLists.txt

@@ -1,9 +1,11 @@
 INCLUDE (${CMAKE_ROOT}/Modules/FindFLTK.cmake)
 
-
 IF(FLTK_LIBRARY)
   IF(FLTK_INCLUDE_PATH)
-    SUBDIRS(FLTKDialog)
+    OPTION(BUILD_FLTK_GUI "Build FLTK CMake GUI." "ON")
+    IF(BUILD_FLTK_GUI)
+      SUBDIRS(FLTKDialog)
+    ENDIF(BUILD_FLTK_GUI)
   ENDIF(FLTK_INCLUDE_PATH)
 ENDIF(FLTK_LIBRARY)