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#create build area in a ramdisk mounted at /usr/src, sync with backed up sources (saving bandwidth, and your time)
function f_begin(){
        if [[mount | grep "ramfs" | grep "/usr/src"] == ""]; then
                mount -t ramfs -o size=6gb ramfs /usr/src && echo "ramfs mounted"
                cp -R ${TOOLCHAIN_ARCHIVE}/sources} /usr/src/ && echo "local sources copied to ramfs"
                elif [[pwd | grep "/usr/src/sources"] == "/usr/src/sources"]; then
                        f_begin2()
                else
                        echo "run this script at: /usr/src/sources/build-toolchain.sh to continue"
                #fi
        fi
}