Hello I have the same problem or similar. I have downloaded protocol buffers and compiled with cmake as the readme file says in this download: https://github.com/protocolbuffers/protobuf/releases/tag/v3.14.0
Then compiled a simple .proto file, added the .pb.h and .pb.cc:
Added the addutuibak Include and the Linker paths to libs, still I get:
Does anyone know what is happening? Thank you so much