rafactor, remove old todo, add some err msg.

lichao

2021-06-03 8967e7f2f8b94dc032135707e16c8a9f233d0db6

 proto/cpp/CMakeLists.txt

@@ -8,4 +8,4 @@
PROTOBUF_GENERATE_CPP(PROTO_SRCS PROTO_HDRS ${proto_files})

add_library(${Target} STATIC ${PROTO_SRCS})
target_link_libraries(${Target} libprotobuf-lite.a)
target_link_libraries(${Target} libprotobuf-lite.a)