See attached build log.
(Please do not complain about the need for looking at the build log until you can provide an easy way to open bugs with the correct data picked out of a tinderbox log. Thanks.)
Created attachment 247791 [details]
*** Bug 362631 has been marked as a duplicate of this bug. ***
+ 20 Feb 2013; Sergey Popov <firstname.lastname@example.org> +stone-2.3e-r1.ebuild,
+ Revision bump: EAPI 5, base eclass, use flag-o-matic for CFLAGS handling,
+ respect LDFLAGS, wrt bug #337879