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
/usr/share/pkgconfig is the correct location for this .pc file. Please refer to reasoning found in https://bugs.freedesktop.org/show_bug.cgi?id=10698 - reopen this bug here if this is a true problem for cross-compilation.
err, resolving too, so something is to reopen if necessary ;p
*** Bug 249861 has been marked as a duplicate of this bug. ***