Dependency Version Notes
Qt ≥4.8
Boost ≥1.51
OpenSSL ≥0.9.8
PCRE ≥8.30 Optional (though recommended) Core dependency. Used by AdBlock and Azoth. Previous 8.x versions will also work though lack JIT support.
Rasterbar libtorrent ≥0.16.x Unicode and DHT support is required.
QXmpp ≥0.8.0
libotr ≥4.0.0 Required for the Azoth OTRoid plugin (3.x will also work though lack some features).
hunspell ≥1.3.0 Required for the Rosenthal plugin.
Speex ≥1.0 Required for the Azoth plugin compiled with ENABLE_MEDIACALLS.
libtelepathy-qt4 ≥0.9.0 Required for the Azoth Astrality plugin.
libpurple ≥2.10 Required for the Azoth VelvetBird plugin.
gstreamer 0.10 or ≥1.0 Required for the LMP plugin.
Taglib ≥1.7.0 Required for the LMP plugin.
libguess ≥1.0 Recommended for the LMP plugin.
liblastfm ≥0.3.3 Required for the LastFMScrobble plugin.
ffmpeg ≥1.2.0 Used by the MusicZombie plugin (libav would not work thanks to differences in resampling code).
chromaprint ≥0.6 Used by the MusicZombie plugin.
poppler ≥0.24.0 Required for the Monocle PDF plugin (0.22.x will work too, but it has some issues with threading).
ghostscript ≥9.0 Required for the Monocle PostRus plugin.
djvu ≥3.5.24 Required for the Monocle Seen plugin.
Qwt ≥6.1 Required for the Lemon, Liznoo, Poleemery plugins and Core if graphs are enabled. Optional for LMP FrAdj.
libsensors ≥3.3.0 Required for the HotSensors plugin.
udev ≥180 Required for the DevMon plugin (*NIX-only).
X11 * Required for KBSwitch, Krigstask, Mellonetray, SB2 and utility library (*NIX-only).
kqoauth ≥0.98 Required for the Azoth WoodPecker and Blasq Spegnersi plugin.
Qross ≥0.2.0 Required for the Qrosp plugin.
QScintilla2 ≥2.6 Required for the Popishu plugin.
CMake ≥2.8.9

A pretty decent compiler is required for LeechCraft from master. gcc 4.8 and clang 3.4 will surely work.

Note: this guide assumes a *NIX-like OS like Linux or FreeBSD. Building with Windows is possible but is full of patching and heavy work, and it hasn’t been properly documented yet.

Platform-specific prerequisites


Dependency Version Notes
libX11 Required for Krigstask, Mellonetray, KBSwitch and Core (if X11 support library is enabled).
libXdamage Required for Mellonetray.
libXcomposite Required for Krigstask.
libxkbcommon Required for KBSwitch.
libxkbfile Required for KBSwitch.

Getting prerequesites

Some distros allow easy installation of all the required prerequesites, and the process is documented here.

Debian, Ubuntu

It’s as simple as running the following from root:

sudo add-apt-repository ppa:tehnick/leechcraft-unstable
sudo apt-get update
sudo apt-get build-dep leechcraft-unstable


Execute the following replacing openSUSE_Tumbleweed with your distro version:

sudo zypper ar
sudo zypper ref
sudo zypper si -d leechcraft

Getting sources

You can either download (an extremely outdated) source package from or check out the files from git (you will need git for this). The later is strongly advised.

To check out the sources from git, cd into a directory where you want leechcraft subdirectory to be placed. In this guide we assume it’s ~/Programming. Issue the following from that directory:

git clone git://

This would create ~/Programming/leechcraft and put the project’s sources and commit history there. To later update the repository, just issue:

cd ~/Programming/leechcraft
git pull

Building and installing

We use so-called out-of-source builds. They support having different builds with different configurations simultaneously as well as easily remove the build directory if something goes wrong. So, create a directory in ~/Programming/leechcraft, say, build, and cd into it. Type

cmake -DCMAKE_BUILD_TYPE=BuildType ../src 

Here BuildType specifies what type of the build you want:


Release version with no debugging information and optimizations enabled.


Debug version with debugging information and no optimizations at all.


A version with both debugging information and optimizations enabled (recommended).


Release version with optimizations for producing executables of minimal size.

Then, after cmake successfully prepares the build system, type ccmake and check the list of plugins to be built. You can enable or disable them there nicely. Alternatively, you can manually edit the CMakeCache.txt file in the build directory, modifying values of variables starting with ENABLE_.

After you’ve selected what you want to build, run make and have a cup of coffee while LeechCraft compiles. To compile things faster, append the -jN option, where N is number of cores you have. For a decent Core i7 system that would be make -j8, for example. If it fails, join the Jabber conference and feel free to ask.

Become root and issue make install to install LeechCraft into /usr/local. That’s it!

Please note that LeechCraft won’t work without installing


cd ~/Programming/leechcraft/build
sudo cmake -P cmake_uninstall.cmake

Microsoft Windows

Hehe. It’s tricky. Don’t try.

More seriously, building on Win32 requires a good knowledge of the build process, Qt and Boost pecularities and various typical but subtle errors.

Nevertheless, if you are brave enough, you could follow the Win32 building guide.


LeechCraft segfaults on startup

make install is required, really.

LeechCraft doesn’t start, outputting into console complaints about

If you get something like

leechcraft: error while loading shared libraries: cannot open shared object file: No such file or directory

then just run ldconfig as root.

If you still can’t run LeechCraft with the same error, check that


are present in your /etc/ For example, default Mandriva setups are known to miss these lines.

Linking/startup problems on FreeBSD/Mac OS X in BitTorrent plugin

If you get linking errors in (or libleechcraft_bittorrent.dylib on Mac OS X), particularly, something like:

Undefined symbols:
  "boost::filesystem2::no_check(std::basic_string, std::allocator > const&)", referenced from:
      LeechCraft::Plugins::BitTorrent::TorrentMaker::Start(LeechCraft::Plugins::BitTorrent::NewTorrentParams)in torrentmaker.cpp.o
ld: symbol(s) not found

make sure you are building with optimizations enabled (setting CMAKE_BUILD_TYPE to Release will do). Make sure there is only one Boost installation on your system or, at least, that the plugin (and libtorrent) is being linked to the same version of the Boost libraries that it’s compiled with.

LeechCraft fails to build with your_compiler_name

Please see prerequesites.

CMake outputs `Package libtorrent-rasterbar was not found in the pkg-config search path` and fails with an error

The full error message is:

Package libtorrent-rasterbar was not found in the pkg-config search path.
Perhaps you should add the directory containing `libtorrent-rasterbar.pc'
to the PKG_CONFIG_PATH environment variable
No package 'libtorrent-rasterbar' found

If you get that, you should find where your libtorrent-rasterbar.pc (typically the locate libtorrent-rasterbar.pc command will do, though you would probably need to update its search base) is and issue the following command:

export PKG_CONFIG_PATH="/path/to/your/libtorrent-rasterbar.pc"

and then re-run CMake in the same shell with the same command line.

If you re-configure LeechCraft often, you’d probably want to add this export declaration to your ~/.bashrc.