prefix=/tmp/protoc
exec_prefix=${prefix}
libdir=${exec_prefix}/lib
includedir=${prefix}/include

Name: Protocol Buffers
Description: Google's Data Interchange Format
Version: 3.0.0-beta-3
Libs: -L${libdir} -lprotobuf -D_THREAD_SAFE  
Libs.private: -lz 
Cflags: -I${includedir} -D_THREAD_SAFE 
Conflicts: protobuf-lite