You only need it if you are building on an arch which hasn't moved to gcc4 yet (that is, not amd64 or sparc64).
On Sun, May 30, 2010 at 11:30:15AM +0200, Dorian B?ttner wrote: > Marco's instructions, pointed to from the undeadly article, mentions > to set COMPILER_VERSION=gcc4 in mk.conf, as opposed to current.html > which does not list this step. > > Does it make any difference having it in mk.conf or not? Propably > this would have been explixitely mentioned in the 2010/05/09 change, > if I'm not totally wrong. > > Thanks, > Dorian