see attached filed
Created attachment 102480 [details]
glibc build error
Yes, your kernel is way too old for nptl...
so i if I don't use nptl nptlonly it might compile?
Yes; for nptl you need 2.6.9 at least. In fact, the ebuild does check for this but your kernel version appears to whacky for the check to work. I'd strongly suggest to upgrade to latest stable kernel anyway due to the huge number of security issues.