nixpkgs/pkgs/os-specific/linux/kernel/builder.sh

source $stdenv/setup


configurePhase=configurePhase
configurePhase() {
    export INSTALL_PATH=$out
    export INSTALL_MOD_PATH=$out


    # Get rid of any "localversion" files installed by patches.
    if test -z "$allowLocalVersion"; then
        rm -f localversion*
    fi

    # Set our own localversion, if specified.
    if test -n "$localVersion"; then
        echo "$localVersion" > localversion-nix
    fi


    # Create the config file.
    cp $config .config
    chmod u+w .config

    echo "$extraConfig" >> .config

    #substituteInPlace scripts/kconfig/lxdialog/check-lxdialog.sh \
    #    --replace /usr /no-such-path

    # Necessary until NIXPKGS-38 is fixed:
    echo "#! $SHELL" > scripts/kconfig/lxdialog/check-lxdialog.sh
    chmod +x scripts/kconfig/lxdialog/check-lxdialog.sh
    
    make oldconfig \
        $makeFlags "${makeFlagsArray[@]}"
}


installPhase=installPhase
installPhase() {

    ensureDir $out

    # Copy the bzImage and System.map.
    cp System.map $out
    if test "$arch" = um; then
        ensureDir $out/bin
        cp linux $out/bin
    else
        cp arch/$arch/boot/bzImage $out/vmlinuz
    fi

    # Install the modules in $out/lib/modules with matching paths
    # in modules.dep (i.e., refererring to $out/lib/modules, not
    # /lib/modules).  The depmod_opts= is to prevent the kernel
    # from passing `-b PATH' to depmod.
    export MODULE_DIR=$out/lib/modules/
    make modules_install \
        DEPMOD=$module_init_tools/sbin/depmod depmod_opts= \
        $makeFlags "${makeFlagsArray[@]}" \
        $installFlags "${installFlagsArray[@]}"

    # Strip the kernel modules.
    echo "Stripping kernel modules..."
    find $out -name "*.ko" -print0 | xargs -0 strip -S

    # move this to install later on
    # largely copied from early FC3 kernel spec files
    version=$(cd $out/lib/modules && ls -d *)

    # remove symlinks and create directories
    rm -f $out/lib/modules/$version/build
    rm -f $out/lib/modules/$version/source
    mkdir $out/lib/modules/$version/build

    # copy config
    cp .config $out/lib/modules/$version/build/.config

    if test "$arch" != um; then
        # copy all Makefiles and Kconfig files
        ln -s $out/lib/modules/$version/build $out/lib/modules/$version/source
        cp --parents `find  -type f -name Makefile -o -name "Kconfig*"` $out/lib/modules/$version/build
        cp Module.symvers $out/lib/modules/$version/build

        # weed out unneeded stuff
        rm -rf $out/lib/modules/$version/build/Documentation
        rm -rf $out/lib/modules/$version/build/scripts
        rm -rf $out/lib/modules/$version/build/include

        # copy architecture dependent files
        cp -a arch/$arch/scripts $out/lib/modules/$version/build || true
        cp -a arch/$arch/*lds $out/lib/modules/$version/build || true
        cp -a arch/$arch/Makefile.cpu $out/lib/modules/$version/build/arch/$arch || true
        cp -a --parents arch/$arch/kernel/asm-offsets.s $out/lib/modules/$version/build/arch/$arch/kernel || true

        # copy scripts
        rm -f scripts/*.o
        rm -f scripts/*/*.o
        cp -a scripts $out/lib/modules/$version/build

        # copy include files
        mkdir -p $out/lib/modules/$version/build/include
        cd include
        cp -a acpi config linux math-emu media net pcmcia rxrpc scsi sound video asm asm-generic $out/lib/modules/$version/build/include
        cp -a `readlink asm` $out/lib/modules/$version/build/include
        cd ..
    fi
}


genericBuild