irssi-xmpp is not built with $RPM_OPT_FLAGS, see build log (the "cc" lines do not have any intended optflags): http://kojipkgs.fedoraproject.org/packages/irssi-xmpp/0.50/3.fc14/data/logs/x86_64/build.log When submitting/reviewing packages, remember to run rpmlint on all binary rpms (preferably after installing them) in addition to the source rpm.
Thank you for your report. I have committed empty patch :-/ No it's fixed