make : deprecate

[ggerganov]

ref #10268

Disabling the Makefile unless LLAMA_MAKEFILE is defined. This should give more focus for the CMake build and will help clean-up any usage of make in the existing CI. The Makefile will be eventually removed or stripped to a very minimal version.

[MaggotHATE]

stripped to a very minimal version

That would be a much more preferred option. Like LostRuins mentioned in the original discussion, Makefile is a very simple and handy option that gives additional flexibility to projects that use llama.cpp, and it is multiplatform.

If you see the current state of Makefile as a burden, it is worth at least leaving a simplified version - for example, main and server as the most popular applications. This would serve not only as a quick "build and test" option, but also as an example for those who use Makefile in their projects. Then, for all advanced options users can be directed towards CMake only.

[slaren]

Is there a single platform that does not have easy access to cmake? If typing two commands instead of one is too much effort, we can always have the Makefile run cmake. In any case, let's keep that discussion to #10268.