There are a few changes in glibc-2.10 that might make your software fail to build with it, please refer to my blog post [1] if you're not sure what the problem is. And no I don't usually provide emerge --info with these bugs because they are caused by glibc-2.10! Thanks, Diego [1] http://blog.flameeyes.eu/2009/05/24/c-libraries-galore
Created attachment 193461 [details] Build log
wu2.5.0a.c:109: error: conflicting types for 'getline' /usr/include/stdio.h:651: note: previous declaration of 'getline' was here wu2.5.0a.c:769: error: conflicting types for 'getline' /usr/include/stdio.h:651: note: previous declaration of 'getline' was here etc.
Fixed in portage.