Getting Started/Build/KDE4
Getting_Started/Build/KDE4
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Tutorial Series | Getting Started |
Previous | Anonymous SVN Quickstart Guide |
What's Next | Set up KDE 4 for development |
Further Reading | kdesvn-build: The KDE From Subversion Build Tool Increased Productivity in KDE4 with Scripts Introduction to CMake FreeBSD notes Instructions for Mac OS X Instructions for MS Windows |
Abstract
This tutorial shows one way to get KDE from trunk running on Linux/BSD systems. There are also tutorials for FreeBSD, Windows, Mac OS X and Solaris. Throughout the tutorial the bash shell is used.
Software Requirements
The following needs to be installed to successfully use this tutorial:
- gcc and g++, preferably version 4.2 or higher
- svn, the subversion revision control client
- pkg-config
- development libraries and headers for X11, OpenGL (mesa-common-dev and libglu1-mesa-dev), libjpeg, libpng, libungif, libclucene, librdf, libxml2 and libxslt
- the makeobj script, which is included in kdesdk. You can install it from kdesdk (kdesdk-scripts on Debian) or similar packages, or download at WebSVN
- the shared-mime-info package, is the freedesktop MIME standard now used in KDE
- boost, used by kdebase; after build and/or install, in order to make cmake aware about its location (FindBoost), add the boost directory (which contains the include subdirectory) to CMAKE_INCLUDE_PATH or set a environment variable called BOOST_ROOT that points to the boost directory.
Create a user account for KDE4 development
However it is much more efficient to do everything with a single user account, see Increased Productivity in KDE4 with Scripts for more details.
You can still follow the instructions below, but don't put the environment variables in your .bashrc, put them in a separate file that you source to switch to the KDE 4 environment.
Option 1: Command Line
useradd -m kde-devel -s /bin/bash
passwd kde-devel
Option 2: Using KControl
Instead of using the commands above, you can also use the User module in the KDE Control Center if you already have KDE3 installed.
Setting up the environment
Copy the ~/.bashrc from your normal user account to the new kde-devel account. Next, copy and paste the contents of the example .bashrc into ~kde-devel/.bashrc. Be sure to comment out the line alias make=makeobj if you do not have the makeobj command available. You will probably also want to modify the path to make sure it doesn't include your kde3 paths. Also if you want to use KDevelop to develop KDE 4 applications you may pass the -GKDevelop3 flag to the cmake command (to make CMake generate KDevelop project files, it will help to avoid rebuilding in the future, see this).
To make it run, you have to open a new bash or to execute
source ~/.bashrc
This will provide access to commands such as cmakekde that are used in this tutorial as well as ensure that the proper paths are in place for Qt, KDE and CMake binaries.
For more information, please read the Getting Started/Increased Productivity in KDE4 with Scripts tutorial.
Switching to the New User
Switch to the user kde-devel: (don't forget the dash)
ssh -X kde-devel@localhost
Required packages from your distribution
The requirements to build kde4 from source vary from distribution to distribution. Instructions for your distribution are provided below:
Your next compilation step depends on the packages supplied by your distro. Instructions for building all dependancies including HAL, Cmake, Qt4 and kde-support are available in the build prerequisites page.
kdelibs
We can now move on to building KDE's base libraries.
The Recipe
cd cs # 'cs' is a bash function, click here to learn more mkdir KDE && cd KDE svn checkout svn://anonsvn.kde.org/home/kde/branches/KDE/4.0/kdelibs cd kdelibs cmakekde
What's Happening
We change to the base source directory (line 1) then make and go into the KDE directory (line 2). We download the sources for kdelibs using subversion (line 3), go into the new ~/kde/src/KDE/kdelibs directory (line 4), and commence the build (line 5). This will leave us in the kdelibs build directory after the build is completed.
Additional KDE-specific CMake modules
There are additional CMake modules in kdelibs/cmake/modules/ that are necessary for building KDE4 applications. These will be installed for you when kdelibs itself is installed.
Troubleshooting
For troubleshooting information, see the kdelibs troubleshooting section.
kdepimlibs
After kdelibs, but before kdebase, you need to build and install kdepimlibs.
The Recipe
cs KDE # 'cs' is a bash function, click here to learn more svn checkout svn://anonsvn.kde.org/home/kde/branches/KDE/4.0/kdepimlibs cd kdepimlibs cmakekde
What's Happening
We go into the KDE source directory (line 1), download the source code for kdepimlibs using subversion (line 2) and then go into the new ~/kde/src/KDE/kdepimlibs directory (line 3). We then commence the build (line 4). This will leave us in the kdepimlibs build directory after the build is completed.
Troubleshooting
For troubleshooting information, see the kdepimlibs troubleshooting section.
kdebase
kdebase is divided into three parts:
- apps
- This contains applications like Dolphin or KWrite.
- runtime
- This contains things needed by every application at runtime, like icons. It is a required dependency for each KDE application, so you have to compile and install this.
- workspace
- This contains things specific to the KDE desktop, like Plasma or the window manager. Most stuff here depends on X11. You only need it if you want to build a full KDE desktop.
You can build all of kdebase at once, which is described in the recipe below. If you only want to build kdebase-runtime, which is the only requirement, you can replace cd kdebase
with cd kdebase/runtime
in the recipe below.
The Recipe
cs KDE # 'cs' is a bash function, click here to learn more svn checkout svn://anonsvn.kde.org/home/kde/branches/KDE/4.0/kdebase cd kdebase cmakekde
Troubleshooting
For troubleshooting information, see the kdebase troubleshooting section.
Running KDE 4 programs
You can now run KDE 4 programs (e.g. kwrite) by typing:
ssh -X kde-devel@localhost kwrite
Troubleshooting
For troubleshooting issues see troubleshooting running programs
Generating local API documentation
Although the API documentation for KDE is available online at api.kde.org, it is sometimes useful to have it on your own disk, for example when you want to use KDevelop for browsing the documentation or when you are not able to be online all the time.
Be aware that generating the API documentation can take several hours and takes almost half a gigabyte of diskspace. The generation is handled by a script in kdelibs/doc/api, you need doxygen to be able to run it.
To build the API documentation for kdelibs, type the following:
cs KDE/kdelibs # 'cs' is a bash function, click here to learn more $KDE_SRC/KDE/kdelibs/doc/api/doxygen.sh \ --doxdatadir=$KDE_SRC/KDE/kdelibs/doc/common .
Repeat for other modules as desired.
cd <module home> $KDE_SRC/KDE/kdelibs/doc/api/doxygen.sh \ --doxdatadir=$KDE_SRC/KDE/kdelibs/doc/common .
Another, even easier method involves downloading this Doxyfile to your local system. Then simply change directory to where you want to create the documentation and run
% doxygen /path/to/Doxyfile
Then review the file doxygen.log to see the doxygen errors and warnings. You'll find the actual documentation in the apidocs subdirectory.
Staying up to date
In order to keep the kde4 installation up to date, each of the modules installed should be updated periodically. As Monday is the day for big changes in kdelibs, Tuesday may be the best day to do this. For each module checked out, run svn up and make.
For example:
cs kdesupport # cs is not a typo
svn up
cb # cb is not a typo
make install
Note: it is not necessary to run cmakekde for updates.
Installing a subset of a module
Many modules in KDE contain a large number of programs which could take a long time to download and compile. In cases where you want to work only on a particular program or programs in a module, it is possible to download and compile particular folders. In some cases, certain folders are required for any build of the module. This is determined in the CMakeLists.txt file of the module. For example the kdegames CMakeLists.txt file lists:
add_subdirectory(libkdegames)
add_subdirectory(libkmahjongg)
macro_optional_add_subdirectory(doc)
macro_optional_add_subdirectory(lskat)
macro_optional_add_subdirectory(katomic)
So, the libkdegames and libkmahjongg directories are required to build any of kdegames. The cmake directory will also usually be required. All the other directories (doc, katomic etc) are optional. They will be built if present on your machine. In this example, we build kmahjongg and kbattleship:
cs KDE
svn co -N kdegames # The -N switch performs a non-recursive checkout
cd kdegames
svn up libkdegames # Get required directories
svn up libkmahjongg
svn up cmake
svn up kbattleship # Get optional directories
svn up kmahjongg
cmakekde
General troubleshooting
What can happen over time, after some svn up commands, is that some of the tools used in the KDE build chain change their output format. For example, kcfg files are read by kconfig_compiler to produce configuration dialogs. CMake cannot detect those changes, and the compilation might fail. A workaround is to always force a re-generation of all such files:
find $KDE_SRC/KDE/kdebase -name "*.kcfg" | xargs touch
The same applies to ui files as produced by Qt designer.
Locked sessions
When installing KDE 4 as a user, one will not be able to unlock a locked session. To work around this issue you can either:
su chown root.root $KDEDIR/lib/kde4/libexec/kcheckpass
or
chmod 755 $KDEDIR/lib/kde4/libexec/kcheckpass
Also you have to add a "kde" service in /etc/pam.d/ folder
For example for RH/Fedora based distros:
#%PAM-1.0
auth include system-auth
account include system-auth
password include system-auth
session include system-auth
Success!!
You are now ready to start building other svn modules in the same fashion as you built kdebase, running and testing KDE4 or writing your own patches and applications.
See the Set up KDE 4 for development tutorial for how to start KDE 4 applications and how to use KDevelop to work on them.