Hello. I have contacted the upstream for gpbruild (AdaCore) months ago, without answer for now. Google (for grpc) will probably also have more urgent concerns that avoiding a name clash with an unrelated library. I hope that the issue has been reported there too, so that they avoid third-letter global identifiers in the future :-).
In Debian, libgpr has been introduced by: grpc on 2015-08-16 gprbuild on 2016-08-11 Unless someone suggests a better fix, I intend to rename gprbuild/libgpr to gprbuild/libgnatprj.
