libir in vpx.pc should be set as $(LIBSRCDIR). In the current libs.mk, libdir is hard-coded as ${prefix}/lib
Upstream bug: http://code.google.com/p/webm/issues/detail?id=420
(In reply to comment #1) > Upstream bug: > http://code.google.com/p/webm/issues/detail?id=420 The fix has been applied to the upstream git tree. https://gerrit.chromium.org/gerrit/#change,20775
Fixed in libvpx-1.0.0-2.fc18.