Version 22 (modified by Cas, 8 years ago) (diff)


Build libtorrent from source

Check libtorrent documentation for any updates to build procedures.

Ubuntu / Debian

  1. Install dependencies for libtorrent build automatically using build-dep:
    sudo apt-get build-dep libtorrent-rasterbar
    sudo apt-get install checkinstall

OR if that fails manually install them:

sudo apt-get install build-essential checkinstall libboost-system-dev libboost-python-dev libssl-dev libgeoip-dev
  1. Download libtorrent and extract:
    tar xf libtorrent-rasterbar.tar.gz
    cd libtorrent-rasterbar
  2. Configure:
    ./configure --enable-python-binding --with-libgeoip --with-libiconv
    • Missing configure script: (e.g. source code from git) create it with ./ (requires extra packages: sudo apt-get install autoconf automake libtool).
    • Logging: Add --enable-logging=default to get logs in the current working directory. verbose and error can also be used.
    • Debug: To create a debug build add --enable-debug=yes.
  1. Build:
    make -j$(nproc)
    • CPU Cores: The make option -j$(nproc) will utilize all available cpu cores.
  1. Install library and python bindings:
    sudo checkinstall
    sudo ldconfig
    Substituted make install for checkinstall as it creates a deb package for easier removal/re-install by dpkg.
    Running ldconfig avoids an ImportError for, a result of Python being unable to find the main library.
  1. Verify libtorrent and the python bindings are installed correctly:
    python -c "import libtorrent; print libtorrent.version"


  1. Download and install/extract these packages:

Note: Install or extract to a path without spaces e.g. C:\ drive.

  1. Setup the Windows Command Prompt by executing VC for Python vcvarsall.bat, e.g.:
    "%USERPROFILE%\AppData\Local\Programs\Common\Microsoft\Visual C++ for Python\9.0\vcvarsall.bat"
    Note: If using Visual Studio simple open a Visual Studio 2008 Command Prompt.
  1. Boost Build Steps:

Due to a boost bug with VC for Python, need to edit project-config.jam in boost folder to the following:

using msvc : : : <setup>"%USERPROFILE%\\AppData\\Local\\Programs\\Common\\Microsoft\\Visual C++ for Python\\9.0\\vcvarsall.bat" ;

In the boost directory run the following:

b2 --with-system --with-date_time --with-python
  1. Create a Boost user-config.jam file in the toplevel folder (e.g. C:\boost) with the following to force msvc version:
    using msvc : 9.0 : : <setup>"%USERPROFILE%\\AppData\\Local\\Programs\\Common\\Microsoft\\Visual C++ for Python\\9.0\\vcvarsall.bat" ;
    Note: For Visual Studio, simply using msvc : 9.0 ; is required.
  1. libtorrent Build Steps:
    1. Setup the Environmental Variables:
      set INCLUDE=C:\OpenSSL-Win32\include;%INCLUDE%
      set LIB=C:\OpenSSL-Win32\lib;%LIB%
      set BOOST_BUILD_PATH=C:\boost
    2. Navigate to libtorrent Python bindings folder:
      cd C:\libtorrent-rasterbar\bindings\python
    3. Build libtorrent with Python bindings:
      b2 boost=source link=static geoip=static boost-link=static release optimization=space encryption=openssl

Upon a successful build the library file named libtorrent.pyd is created in the current bindings/python directory.

Debugging libtorrent on Windows

  • Download and install just the debug tools:
  • Build libtorrent with debug enabled by changing release to debug in the b2 build line.
  • Open windbg (C:\Program Files\Debugging Tools for Windows (x86)\windbg.exe):
    • File|Open Executable and tick Debug child processes
    • Hit F5 or Go a few times to get the program running
    • After the crash execute: !analyze -v -f.
  • Symbols for libtorrent will be in the build output path:
    So the full symbols line should look something like this:

Debug References:

Further Resources