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6. Install Qt


        -- for Qt, there is no "make install", just place the source
        -- where you want it to live:
	cd /usr/local
	tar -xvzf qt-x11-2.2.2.tar.gz
	ls -s qt-2.2.2 qt
	cd qt
	

Read the INSTALL file about environment variables to setup before you try to build Qt. You can add the following to /etc/profile:

                QTDIR=/usr/local/qt
                PATH=$PATH:$QTDIR/bin
                MANPATH=$MANPATH:$QTDIR/man
                LD_LIBRARY_PATH=$LD_LIBRARY_PATH:$QTDIR/lib
                export QTDIR PATH MANPATH LD_LIBRARY_PATH
        
LD_LIBRARY_PATH is optional if you include an entry in /etc/ld.so.conf for the library path: /usr/local/qt/lib, then run "ldconfig" to update /etc/ld.so.cache.


        -- note: configure has some options you can try, to see them
        -- see ./configure --help
	./configure

        -- NOTE: when you run make as suggested on the next line, you may
        -- encounter a make error that halts the build IF you run make
        -- from outside X.  The program $QTDIR/bin/uic (the User Interface Compiler)
        -- may Segmentation Fault when run from a Linux console.  You can run
        -- "startx" and use the twm (tiny window manager) and xterm (or whatever you
        -- might have setup for X) to run the rest of the Qt build.  If for some
        -- reason twm is not even available, then you can run "XFree86 &", use
        -- "CTRL-ALT-F1" to get to a console, start an xterm as
        --  "xterm -display localhost:0.0 &", then switch back to X with "ALT-F7".

	make

        -- Only for old versions of Qt before 2.1.0 or so ...
	-- compile the opengl extension
	-- Note that in qt 2.2.0 on, the OpenGL support has been moved out of extensions
	-- and is now a standard part of the library that is installed if configure
	-- finds OpenGL installed on your system.  If you were to not want OpenGL
	-- support in Qt, you'd have to pass the -no-opengl option to configure.
	cd extensions/opengl/src
	-- Check the Makefile and ensure there are not Mesa references.
	make


	ldconfig
        cd ../examples
        -- Try compiling and running the examples.
	




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