mcl's author has released 0.53.00, which is basically changes for gcc3. I copied the 0.52.99 ebuild and took out the line for the gcc3 patch. Reproducible: Always Steps to Reproduce: 1. 2. 3.
Created attachment 18550 [details] mcl-0.53.00.ebuild
Added to CVS. Also, converted it to use the games eclass at the same time so keep that in mind (games group and so forth...).