PROTOPATH += .
PROTOPATHS = 
for(p, PROTOPATH):PROTOPATHS += --proto_path=$${p}

protobuf_decl.name = protobuf header
protobuf_decl.input = PROTOS
protobuf_decl.output = ${QMAKE_FILE_BASE}.pb.h
protobuf_decl.commands = protoc --cpp_out="." $${PROTOPATHS} ${QMAKE_FILE_NAME}
protobuf_decl.variable_out = GENERATED_FILES 
QMAKE_EXTRA_COMPILERS += protobuf_decl 

protobuf_impl.name  = protobuf implementation
protobuf_impl.input = PROTOS
protobuf_impl.output  = ${QMAKE_FILE_BASE}.pb.cc
protobuf_impl.depends  = ${QMAKE_FILE_BASE}.pb.h
protobuf_impl.commands = $$escape_expand(\n)
protobuf_impl.variable_out = GENERATED_SOURCES
QMAKE_EXTRA_COMPILERS += protobuf_impl