virtualbox-guest-additions fails to build with gentoo-sources-4.9.6. Fails on compile phase with 'emake failed' after a number of errors. emerge --info attached, and full build.log.
Created attachment 464474 [details] emerge --info
Created attachment 464476 [details] build.log (bzipped due to size limitation)
*** This bug has been marked as a duplicate of bug 603472 ***