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| ==Objectives==
| | #REDIRECT [[Getting Started/Build]] |
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| You probably want to keep your current KDE-3.5.x installation till you feel that KDE-4.x.y meets your needs for actual day to day use of your computer. Yet, you want to be able to change over with a minimum of work when the time comes to make the switch.
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| ==Method==
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| The best way to accomplish this is to install the needed support libraries on your system in the usual manner. Convention is that these should be installed in the /usr/local/ directory. By default, Troll Tech installs Qt in: /usr/local/Trolltech/Qt-4/. The current KDE-4.0 release branch should be built against Qt-4.3.x (the latest in this branch is 4.3.3 which should be used unless there are reasons not to use it). It is best to install KDE-4.x.y in its own directory so that the directory can be deleted if some large problem occurs. I will be using /usr/local/KDE-4.0/ but you can call it whatever you want.
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| We will keep configurations straight by using a separate user account for accessing KDE-4.x.y. This user account will contain your configurations of KDE-4 and will have a script to set the environment variables (.bash_profile if using Linux).
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| ==Installation==
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| === Required packages from your distribution===
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| * [[Getting_Started/Build/KDE4/LFS|Linux from Scratch]] or to build from source.
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| The requirements to build kde4 from source vary from distribution to distribution. Instructions for your distribution are provided below:
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| You need to have the correct versions for: Qt, Soprano, & QImageBlitz.
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| '''DO NOT build the versions for KDE4 TRUNK'''
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| ===Create the User Account===
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| Use whatever method you wish to create a new user account. Mine is called: "KDE4". Then edit or create the user specific login script (.bash_profile for Linux). There is a lot that goes into this. Note that this presumes that USER was correctly set by the system login script.
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| <nowiki>------8<------8<------8<------8<------8<------8<------8<------8<------8<------8<------8<------</nowiki>
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| :<nowiki>#</nowiki> Redundant setting of HOME as work around for Bash bug
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| :HOME=/home/KDE4
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| :PATH=$HOME/bin:<nowiki>$</nowiki>PATH
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| :export PATH HOME
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| :XDG_DATA_HOME="$HOME/.local/share"
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| :XDG_CONFIG_HOME="$HOME/.config"
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| :export XDG_DATA_HOME XDG_CONFIG_HOME
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| :KDEDIR=/usr/local/KDE-4.0
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| :KDEHOME=$HOME/.kde4
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| :KDETMP=/tmp/$USER-kde4
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| :mkdir -p $KDETMP
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| :KDEVARTMP=/var/tmp/$USER-kde4
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| :mkdir -p $KDEVARTMP
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| :KDEDIRS=$KDEDIR
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| :PKG_CONFIG_PATH=/usr/local/KDE-4.0/lib/pkgconfig:$PKG_CONFIG_PATH
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| :export KDEDIR KDEHOME KDETMP KDEVARTMP KDEDIRS PKG_CONFIG_PATH
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| :QTDIR=/usr/local/Trolltech/Qt-4
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| :QT_PLUGIN_PATH=$KDEDIR/lib/kde4/plugins:$QT_PLUGIN_PATH
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| :PKG_CONFIG_PATH=$QTDIR/lib/pkgconfig:$PKG_CONFIG_PATH
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| :export QTDIR QT_PLUGIN_PATH PKG_CONFIG_PATH
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| :PATH=$QTDIR/bin:$KDEDIR/bin:$PATH
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| :export PATH
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| :XDG_CONFIG_DIRS=/usr/local/KDE-4.0/etc/xdg
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| :XDG_DATA_DIRS=$KDEDIR/share
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| :export XDG_CONFIG_DIRS XDG_DATA_DIRS
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| :LD_LIBRARY_PATH=$QTDIR/lib:$KDEDIR/lib
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| :export LD_LIBRARY_PATH
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| :LIBXCB_ALLOW_SLOPPY_LOCK="true"
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| :export LIBXCB_ALLOW_SLOPPY_LOCK
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| <nowiki>------8<------8<------8<------8<------8<------8<------8<------8<------8<------8<------8<------</nowiki>
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| This is in addition to other things that you need in the script which would probably go at the beginning -- this large block of junk is to be added at the end. The XDG directories might need to be modified for your system.
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| To build, you must be logged on as the new user account (KDE4). You can 'su' for the whole thing or 'su -C' for each install.
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| Packages need to be installed with the correct prefixes for this to work:
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| :Qt is configured with --prefix=/usr/local/Trolltech/Qt-4.
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| :KDE should use: -DCMAKE_INSTALL_PREFIX=/usr/local/KDE-4 when running cmake.
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| :Other packages should be installed with the default prefix (/usr/local).
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