cc1plus: warnings being treated as errors
.../usr/include/google/protobuf/io/coded_stream.h: In member function "bool google::protobuf::io::CodedInputStream::ReadLittleEndian32(google::protobuf::uint32*)":
.../usr/include/google/protobuf/io/coded_stream.h:776: warning: comparison between signed and unsigned integer expressions
.../usr/include/google/protobuf/io/coded_stream.h: In member function "bool google::protobuf::io::CodedInputStream::ReadLittleEndian64(google::protobuf::uint64*)":
.../devfs/usr/include/google/protobuf/io/coded_stream.h:791: warning: comparison between signed and unsigned integer expressions