Here is the debdiff of flightgear sources for Raring.
Flightgear FTBFS (even without this debdiff), most likely due to the changes in 2.6.0-3ubuntu1. Until those changes are reverted, flightgear will continue to FTBFS. Note that the libs-underlinkage.patch that was added in that change is not present in Quantal, which also uses 2.6.0.
Here is the debdiff of flightgear sources for Raring.
Flightgear FTBFS (even without this debdiff), most likely due to the changes in 2.6.0-3ubuntu1. Until those changes are reverted, flightgear will continue to FTBFS. Note that the libs-underlinka ge.patch that was added in that change is not present in Quantal, which also uses 2.6.0.