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(2 edits)

Several people have it going on x64 Linux already:

http://monkeycoder.co.nz/forums/topic/compiling-on-ubuntu-14-04-lts-fresh-instal...

http://monkeycoder.co.nz/forums/topic/compiling-on-ubuntu-14-04-lts-fresh-instal...

Feel free to ask questions in the forums (or here, but there are more people at forums).