for some reason nasm can't handle a lable preceeded immediatly by a comment in assembly, zsnes happens to have one such occurrence in (at least as far as I can tell) the attached ebuild revision and patch for zsnes corrects this so that it compiles. If this is NOT correct behavior by nasm, let me know and I'll submit a bug with them.
Created attachment 1014 [details] updated ebuild
I'm adding the fix to cvs. I've no idea if nasm's behaviour is correct though, I'm don't know assembly. But a fix that makes zsnes compile just by removing comments can't be bad :-)