The closest I can find on mysql.com is something called
Generic Linux (Architecture Independent), Compressed TAR Archive
But thats probably a binary installation too, because it has no ‘configure’ script. Its rather frustrating. I’m sure I’m just missing something obvious (just like what happens with code sometimes).
Install Bazaar and get a latest copy of the tree.
http://dev.mysql.com/doc/refman/5.0/en/windows-sourcetree-build.html
You’ll need a MySQL.com account. More about contributing code to MySQL.