You need to use gcc 3.4.6
Your best be is to use the hardened profile with the hardened kernel. This will mask any gcc higher than 3.4.6 and use it as the default.
or you can install gcc 3.4.6 in a different slot
check here:
http://www.eqemulator.net/forums/showthread.php?t=28138
and here:
http://www.eqemulator.net/forums/showthread.php?t=27234
I even wrote a tutorial a while ago on how to setup your gentoo system so you can use both gcc 3.4.6 and 4.x.x here:
http://www.eqemulator.net/forums/sho...3&postcount=17
Hope this helps.