[CMake] Problems to use TRY_COMPILE

[Vitor Vasconcelos Araujo Silva]

	Thanks for your answer Bill,

	I cutted from the example code the LINK_LIBRARIES, sorry.
	I use the Qt4 macro and I get my application compiled without any problems.
	
    FIND_PACKAGE ( Qt4 )

    ADD_DEFINITIONS ( ${QT_DEFINITIONS} )

    INCLUDE_DIRECTORIES ( ${QT_INCLUDE_DIR} )
    INCLUDE_DIRECTORIES ( ${QT_QTCORE_INCLUDE_DIR} )
    INCLUDE_DIRECTORIES ( ${QT_QTGUI_INCLUDE_DIR} )

    INCLUDE_DIRECTORIES ( "../" )

    LINK_DIRECTORIES ( ${QT_LIBRARY_DIR} )

    SET ( GUI_SOURCES
        QGAbstractLayer.cpp
        QGDocViewer.cpp
        QGImageLoader.cpp
        QGMainWindow.cpp
        QGMainWindowSubjectIf.cpp
        QGMultiLayerDoc.cpp
        QGPixmapLayer.cpp
        QGMenu.cpp
        QGFileMenu.cpp
        QGRecentFileMenu.cpp
        QGAbstractMainWindowCommand.cpp
        QGOpenImageCommand.cpp
        QGCloseImageCommand.cpp
        QGEditMenu.cpp
        QGZoomCommand.cpp
        QGCommandToolBar.cpp
        QGMainToolBar.cpp
        QGUndoList.cpp
        QGMainToolsToolBar.cpp
        QGMouseTracker.cpp
        QGSIModeCommand.cpp

        main.cpp )

    INCLUDE_DIRECTORIES ( ${PROJECT_SOURCE_DIR} )

    SET ( QT_EXECUTABLE_NAME "Qt" )
    ADD_EXECUTABLE ( ${QT_EXECUTABLE_NAME} ${GUI_SOURCES} )

    SET(INCLUDE_DIRECTORIES ${QT_INCLUDE_DIR})
    SET(LINK_LIBRARIES ${QT_QTCORE_LIBRARY})

    After this code I call the TRY_COMPILE command. Note that I defined
the INCLUDE_DIRECTORIES and LINK_LIBRARIES variables guessing they 
should be used like this.

 >> TRY_COMPILE(RESULT ${PROJECT_BINARY_DIR}
 >>
 >> ${PROJECT_SOURCE_DIR}/teste.cpp
 >> CMAKE_FLAGS
 >> COMPILE_DEFINITIONS -I${QT_INCLUDE_DIR}
 >>                 -I${QT_QTCORE_INCLUDE_DIR}
 >>                      -l${QT_QTCORE_LIBRARY}
 >> OUTPUT_VARIABLE MY_OUT
 >> )
 >>
 > You are missing LINK_LIBRARIES from Qt.  I don't see where you are
 > passing a link parameter in??
 >
 > -Bill

    And, after the TRY_COMPILE block I finish my CMakeLists defining the
which libraries I want to link to my application.

    TARGET_LINK_LIBRARIES ( ${QT_EXECUTABLE_NAME}
		      ${QT_QTCORE_LIBRARY}
		      ${QT_QTGUI_LIBRARY}
		      )

    Thanks in advance,

-- 
	Vitor VASCONCELOS
	Projet QGAR
	LORIA / INRIA-Lorraine
	Campus Scientifique, BP 239
	54506, Vandoeuvre-lès-Nancy, FRANCE
	Tel: +33 (0)3 54 95 85 76