Difference between revisions of "Getting Started/Build/KDE4"

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This article shows how to download, build, install and start KDE 4 from subversion. It consolidates howtos from various sites, e.g.
#REDIRECT [[Getting_Started/Build|Building KDE]]
[http://developer.kde.org/build/trunk.html the old KDE developer pages].
This topic shows one way that works. It does not intend to explain the obvious background behind it.
You may be interested in: http://kdesvn-build.kde.org/
To reduce complexity, we use the bash-shell (standard) throughout the tutorial.
== Become the user kde-devel ==
useradd kde-devel
mkdir /home/kde-devel
passwd kde-devel
chown kde-devel:kde-devel /home/kde-devel 2>/dev/null || \
chown kde-devel:users /home/kde-devel
Switch to the user kde-devel: (the dash also changes to the new home directory)
su - kde-devel
== Set Environment Variables ==
You have to add some environment variables - add these lines to your shell's configuration file, e.g. {{path|~/.bashrc}}.
export YACC='byacc -d'
export QTDIR=$HOME/qt-unstable
export KDEDIR=$HOME/kde
export PATH=$QTDIR/bin:$KDEDIR/bin:$PATH
## Uncomment if dbus doesn't work
#alias dbusstart="eval `PATH=$DBUSDIR/bin \
#$DBUSDIR/bin/dbus-launch --auto-syntax`"
function cmakekde { cmake -DCMAKE_INSTALL_PREFIX=$HOME/kde \
-DCMAKE_BUILD_TYPE=debugfull [email protected] && make VERBOSE=1 && make install; }
== Check out the software ==
svn co svn://anonsvn.kde.org/home/kde/trunk/qt-copy
svn co svn://anonsvn.kde.org/home/kde/trunk/KDE/kdelibs
wget http://www.cmake.org/files/v2.4/cmake-2.4.3.tar.gz
wget http://dbus.freedesktop.org/releases/dbus/dbus-0.94.tar.gz
== Build D-Bus ==
tar xvfz dbus-0.94.tar.gz
cd dbus-0.94/
./configure --disable-qt --disable-qt3 --prefix=$DBUSDIR \
--localstatedir=/var && make && make install
dbus-uuidgen --ensure
== Build Qt ==
cd ~/qt-copy && ./apply_patches && \
./configure -qt-gif -no-exceptions -debug -fast \
-prefix $QTDIR -qdbus && make && make install
== Build and Install CMake ==
The default prefix is {{path|/usr/local}}, make sure {{path|/usr/local/bin}} is in your <tt>$PATH</tt>.
tar zxf cmake-2.4.3.tar.gz
mkdir cmake-build
cd cmake-build
sudo make install
== Build kdelibs ==
mkdir kdelibs-build
cd kdelibs-build
cmakekde ../kdelibs
=== Install Additional CMake Modules ===
There are additional CMake modules in kdelibs that are necessary for building KDE applications. To install them:
cd kdelibs/cmake/modules
cmake .
make install
You may need to do the last step as root (e.g. using su or sudo), depending on your system setup.
=== Troubleshooting ===
If you have problems compiling this, first make sure the following commands can be executed: aclocal, autoconf, autoheader, gcc, g++, pkg-config.
{{tip|If you get "Could NOT find GIF", install the devel package of <tt>libungif</tt> (the actual name may vary between operating systems).}}
If the problems persist, try the make-option <tt>--keep-going</tt>
== Build kdepimlibs ==
Before ''kdebase'' you need to install ''kdepimlibs''
svn co svn://anonsvn.kde.org/home/kde/trunk/KDE/kdepimlibs
mkdir kdepimlibs-build
cd kdepimlibs-build
cmakekde ../kdepimlibs
== Build kdebase ==
You may need kdebase for some kioslaves.
svn co svn://anonsvn.kde.org/home/kde/trunk/KDE/kdebase
mkdir kdebase-build
cd kdebase-build
cmakekde ../kdebase
=== Troubleshooting ===
If you have troubles compiling this:
* Make sure you have the <tt>libxss headers</tt> installed. (Usually you got undefined references on xscreensaver objects if you haven't those headers)
* <tt>which meinproc</tt> has to deliver {{path|/home/kde-devel/kde/bin/meinproc}}
* if cmakekde cannot find the path of kdepimlibs, edit the file /home/kde-devel/kdebase-build/CMakeCache.txt and manually set KDEPIMLIBS_INCLUDE_DIR:PATH=/home/kde-devel/kdepimlibs-build
* if you get an error saying "Please set the following variables: X11_XTest_LIB (ADVANCED)", install the devel package of <tt>Xtst</tt>. On some systems, this is packaged separately from <tt>xext</tt> and called <tt>x11proto-xext-dev</tt> or <tt>libxtst-dev</tt>. You may also need to remove the CMakeCache.txt file in the build dir after installing the package.
== Start KDE 4 Programs ==
To start the desktop environment itself, do:
X :1 & export DISPLAY=:1
Maybe you are logged in as your normal user (not kde-devel), want to stay in your current environment (KDE 3.5, gnome, whatever) and start a KDE 4 program. To start only kwrite from KDE 4, do:
== Using Xephyr for developing inside KDE 3 ==
Instead of using a full-blown new virtual X for developing software you can use Xephyr to embed your KDE 4 session into your working KDE 3 environment.
Sure you can do this with xnest too, but it cannot handle extensions like Xrender so some people prefer Xephyr over it.
If you want to get a minimal KDE session up and running, just launch Xephyr (available in Kubuntu as xserver-xephyr):
# Xephyr :1&
You can now launch KDE:
export DISPLAY=:1
/path/to/kde4/bin/startkde-modified &
startkde-modified is a copy of the startkde-script which includes the following lines on the top:
export KDEDIRS=`kde4-config --prefix`
export PATH=$KDEDIR/bin/:$PATH
export KDEHOME=~/.kde4
You can also use Xephyr with KDM via the Xdmcp protocol and simply a new KDE 4 session to KDM.
On Kubuntu, you can enable it by changing
# Whether KDM should listen to incoming XDMCP requests.
# Default is true
in {{path|/etc/kde3/kdm/kdmrc}} to
# Whether KDM should listen to incoming XDMCP requests.
# Default is true
and adjust your {{path|/etc/kde3/kdm/Xaccess}} to allow your local machine access. Additionally you should make sure to set up a port blocking policy on all external interfaces for the Xdmcp port if you are doing this on a laptop or a PC in an untrusted environment.
If you are done, simply launch Xephyr:
Xephyr -query localhost :1 -host-cursor -screen 1024x768&
where <tt>-host-cursor</tt> tries to reuse the host's cursor and <tt>-screen</tt> sets the screen dimensions.
== Additional notes: ==
[[Category:Build KDE]]

Latest revision as of 16:34, 20 March 2011

This page was last edited on 20 March 2011, at 16:34. Content is available under Creative Commons License SA 4.0 unless otherwise noted.