Why does the project initialize the static ggml_backend_registry reg; in llama_supports_rpc()

[Hlinbit]

I found a strange mechanism that static ggml_backend_registry reg; is initialized in llama_supports_rpc(). This is found when I debug the llama-cli. The function llama_supports_rpc is called in file llama.cpp/common/arg.cpp.

[slaren]

The backend registry is initialized the first time it is used, and llama_supports_rpc just happens to be the first function that is called that uses the backend registry. Why did you find it strange?

[Hlinbit]

You are right! I checked the whole function common_params_parser_init and found that llama_supports_rpc is the first function using the variable static ggml_backend_registry reg. The usage initialized the variable. This is not intentional, but it happens that reg is used here for the first time.