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 246247 [details]
+*byacc-1.9-r3 (06 Sep 2010)
+ 06 Sep 2010; Michael Weber <firstname.lastname@example.org> +byacc-1.9-r3.ebuild:
+ Rev bump to fix LDFLAGS (bug #336197).