set(OpenGL_GL_PREFERENCE "GLVND")
find_package(OpenGL)
if (NOT (OPENGL_GLU_FOUND AND OPENGL_FOUND))
 message(FATAL_ERROR "Could not find GL and/or GLU")
endif (NOT (OPENGL_GLU_FOUND AND OPENGL_FOUND))

include_directories(${OPENGL_INCLUDE_DIR})
set(LIBS ${LIBS} ${OPENGL_LIBRARIES})
set(FLTK_SKIP_FORMS TRUE)
set(FLTK_SKIP_FLUID TRUE)
find_package(FLTK)
if (FLTK_FOUND)
include_directories(${FLTK_INCLUDE_DIR})
set(LIBS ${LIBS} ${FLTK_LIBRARIES} ${OPENGL_LIBRARIES})

SET(HAS_FLTK_INTERFACE "TRUE" CACHE INTERNAL "")
set(NUTIL_EXTERNAL_INCLUDES ${NUTIL_EXTERNAL_INCLUDES} ${FLTK_INCLUDE_DIR} ${OPENGL_INCLUDE_DIR} CACHE INTERNAL "NUtil External include directories" FORCE)
set(NUTIL_EXTERNAL_LIBRARY_DIRS ${NUTIL_EXTERNAL_LIBRARY_DIRS} ${CMAKE_CXX_IMPLICIT_LINK_DIRECTORIES} CACHE INTERNAL "NUtil External library dirs" FORCE)
set(NUTIL_EXTERNAL_LIBRARIES ${NUTIL_EXTERNAL_LIBRARIES} ${OPENGL_LIBRARIES} ${FLTK_LIBRARIES} CACHE INTERNAL "NUtil External libraries" FORCE)
include_directories(.)
add_library (fltkdisplay-dynamic SHARED fltkdisplay.cc nfltkwindow.cc nglu.cc )
add_library (fltkdisplay-static STATIC EXCLUDE_FROM_ALL  fltkdisplay.cc nfltkwindow.cc nglu.cc)
SET_TARGET_PROPERTIES(fltkdisplay-static PROPERTIES OUTPUT_NAME "fltkdisplay")
SET_TARGET_PROPERTIES(fltkdisplay-dynamic PROPERTIES OUTPUT_NAME "fltkdisplay")
target_link_libraries (fltkdisplay-dynamic ${LIBS} nutil-dynamic )
target_link_libraries (fltkdisplay-static ${LIBS} nutil-static )

add_subdirectory(test)


IF (UNIX)
install(TARGETS fltkdisplay-dynamic)
install(FILES fltkdisplay.h
        DESTINATION include)

endif()
endif(FLTK_FOUND)