I recently updated my RPi and it seems that now /opt/vc/lib isn't in the default searched directory for libraries.
IMO it should be, as Raspbian is shipped with those libraries there should be included. Forcing RPATH is a bad design. I think this is a bug and should be fixed ASAP.
If it's not, could you tell me the correct way to do a .deb with binaries that use stuff in /opt/vc/lib?