Solar and I were x-compiling stuff when we found that the .pc of this package was under /usr/share/pkgconfig instead of /usr/$libdir/pkgconfig. Thanks
Why excatly do you claim /usr/share/pkgconfig is the wrong place for gtk-doc .pc file? I don't see anything architecture specific in it. Is the exec_prefix arch specific?
You are right. I'm closing this down as invalid.