Projects/Mobile/MADDE: Difference between revisions

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    m (Text replace - "<code cmake>" to "<syntaxhighlight lang="make">")
    m (Text replace - "<syntaxhighlight lang="make">" to "<syntaxhighlight lang="cmake">")
     
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    To ease cross-compiling setup, CMake features toolchain files. Here's an example CMake toolchain file that invokes MADDE's gcc directly:
    To ease cross-compiling setup, CMake features toolchain files. Here's an example CMake toolchain file that invokes MADDE's gcc directly:


    <syntaxhighlight lang="make">
    <syntaxhighlight lang="cmake">
    include (CMakeForceCompiler)
    include (CMakeForceCompiler)



    Latest revision as of 10:20, 30 June 2011

    Building KDE for the N900 with the MADDE toolchain

    Warning
    This is pretty much work in progress


    Get MADDE: http://wiki.maemo.org/MADDE

    If you MADDE doesn't have Qt 4.6 support, get it from http://chaos.troll.no/~harald/MADDE

    Note that you also need to symlink Qt from your sysroot to your /opt host directory. This is ugly, and will vanish once MADDE gets full Qt 4.6 support:

    cd /opt/qt4-maemo5
    sudo ln -s $HOME/.madde/0.6.14/sysroots/fremantle-arm-sysroot-2.2009-51-1-qt453/opt/qt4-maemo5/lib .
    sudo ln -s $HOME/.madde/0.6.14/sysroots/fremantle-arm-sysroot-2.2009-51-1-qt453/opt/qt4-maemo5/include .
    

    CMake

    CMake got cross-compiling support in version 2.6. Note that CMake currently can't build ARM and x86 binaries at the same time, so anything that needs a bootstrapped tool needs to be compiled twice, once for x86 and once for ARM.

    To ease cross-compiling setup, CMake features toolchain files. Here's an example CMake toolchain file that invokes MADDE's gcc directly:

    include (CMakeForceCompiler)
    
    set(CMAKE_SYSTEM_NAME Linux)
    
    # set this to wherever MADDE is
    set(MADDE_HOME $ENV{HOME}/.madde/0.6.14/targets/fremantle-qt-0951)
    
    CMAKE_FORCE_C_COMPILER(${MADDE_HOME}/bin/gcc GNU)
    CMAKE_FORCE_CXX_COMPILER(${MADDE_HOME}/bin/g++ GNU)
    
    set(CMAKE_FIND_ROOT_PATH ${MADDE_HOME})
    
    set(CMAKE_FIND_ROOT_PATH_MODE_PROGRAM NEVER)
    set(CMAKE_FIND_ROOT_PATH_MODE_LIBRARY ONLY)
    set(CMAKE_FIND_ROOT_PATH_MODE_INCLUDE ONLY)
    

    Save this file somewhere, e.g. to toolchain-madde.cmake and pass -DCMAKE_TOOLCHAIN_FILE=$HOME/toolchain-madde.cmake parameter.

    Unfortunately, current CMake 2.6 likes to use absolute paths. This won't work well with MADDE, which evaluates absolute paths relative to its sysroot directory. The -DCMAKE_USE_RELATIVE_PATHS=ON CMake flag could help, but seems to have some issues. In the meantime, we use a small hack, by symlinking our home directory into MADDEs sysroot, so all pathes within the MADDE environment will match the ones on our home system:

    cd ~/.madde/0.6.14/sysroots/fremantle-arm-sysroot-2.2009-51-1-qt453
    mkdir home
    cd home
    ln -s $HOME .
    

    It is assumed that you checked out the kde sources in your $HOME directory, otherwise, adjust the symlink accordingly.

    kdelibs

    KDElibs has several bootstrapped tools, which need to be compiled for x86. Unfortunately, current CMake doesn't support building them in one go, so we have to do the following:

    cd /path/to/kdelibs/sources
    mkdir build-x86
    cd build-x86
    cmake ..
    make -C kdecore/kconfig_compiler
    make -C kjs icemaker
    make -C kdoctools meinproc4
    

    This builds the host tools for x86.

    Now, we can do an ARM build:

    cd /path/to/kdelibs/sources
    mkdir build-arm
    cd build-arm
    cmake .. -DCMAKE_TOOLCHAIN_FILE=$HOME/toolchain-madde.cmake -DKDE_HOST_TOOLS_PATH=/path/to/kdelibs/sources/bld-x86 ..
    

    adapt the pathes above accordingly.