https://bugzilla.redhat.com/show_bug.cgi?id=902861
--- Comment #6 from Michael Cronenworth mike@cchtml.com --- Simone, unfortunately Pango had some development releases in the 1.32 stable version branch. 1.32.6 is one of those releases.
My patch could be applied to the F18 package (1.32.3) without needing to worry about other packages in F18.
Worst case (as Red Hat maintainers sometimes ignore these bug reports): You will have to add a patch to your package to remove -Werror.