On my ~amd-64 machine with hardened-gcc-4.6.2 I see the following error when merging racc. * Running test phase for ruby18 ... (in /var/tmp/portage/dev-ruby/racc-1.4.7/work/ruby18/racc-1.4.7) rake aborted! Could not find rake-compiler (>= 0.4.1) amongst [hoe-2.12.3, json-1.6.1, minitest-2.6.2, rake-0.8.7, rdoc-3.6.1, rubyforge-2.0.4] dev-ruby/rake-compiler is not installed on my system.
Created attachment 293501 [details] build log
Created attachment 293503 [details] emerge --info
If I manually install dev-ruby/rake-compiler everything works fine.
Fixed in place for racc-1.4.7 by avoiding the need for rake-compiler altogether.