Compilation error

[bsuvonov]

Hi, I am using Ubuntu and getting the following error during compilation:

g++ -std=c++20  -O3 -g -o build/main.o -c src/main.cpp -Iinclude -I/usr/local/include -Iinclude/imgui
In file included from include/api.h:10,
                 from include/engine.h:1,
                 from src/main.cpp:1:
include/protos/api.pb.h:17:2: error: #error This file was generated by an older version of protoc which is
   17 | #error This file was generated by an older version of protoc which is
      |  ^~~~~
include/protos/api.pb.h:18:2: error: #error incompatible with your Protocol Buffer headers. Please
   18 | #error incompatible with your Protocol Buffer headers. Please
      |  ^~~~~
include/protos/api.pb.h:19:2: error: #error regenerate this file with a newer version of protoc.
   19 | #error regenerate this file with a newer version of protoc.
      |  ^~~~~
make: *** [makefile:36: build/main.o] Error 1

What could the issue be?

[collinalexbell]

Would you send me the result of

protoc --version

and

lsb_release -a ?

Thanks

[bsuvonov]

@collinalexbell

The output for protoc --version:
libprotoc 3.20.3

Output for lsb_release -a:

No LSB modules are available.
Distributor ID:	Ubuntu
Description:	Ubuntu 23.10
Release:	23.10
Codename:	mantic

[collinalexbell]

Hmm maybe do an 'apt update' and 'sudo apt install protobuf-compiler'.

Then 'rm build/include/protos/*' and recompile.

[bsuvonov]

I did as you said, compiler is installed, and there is no build/include/protos/, still getting the same error.

[collinalexbell]

Sorry. It is 'rm include/protos/*'

There is a version mismatch between the compiled proto header and the C++ library or something like that.

[bsuvonov]

Ahh, I tried this too but still the same result

[collinalexbell]

This is a strange error because the project isn't mixing pre-compiled protobuf code with protobuf code compiled at buildtime. I don't know what other version it would be comparing to since the api.pb.h beams the only proto header in the project.