Support for passing to CMake any random string

[lilianmoraru]

Currently, the crate limits the user on what kind of options he can pass to CMake.
I am trying to pass -C path/to/a/cmake/script.cmake(it's a script that speeds-up build-times, I use it for all cmake projects) and it is just impossible to do that with the current API.
I think there should be an option where the user can pass flags himself, whatever he wants.

[alexcrichton]

Seems reasonable to me! Would you be interested in sending a PR?

[lilianmoraru]

I could do that.
What do you think would be the appropriate naming for these functions?
I am thinking(inspired by std::process::Command) of: cmake_arg/cmake_args or arg/args?
At least for me, arg/args seems too ambiguous.

[alexcrichton]

Yeah cmake_arg and cmake_args sounds good to me!

[tomjakubowski]

I think that this use-case is covered by either configure_arg() or build_arg(), where configure_arg() passes arguments before the -- and build_arg() passes arguments after, like so:

cmake <configure_arg1> <configure_arg2> ... -- <build_arg1> <build_arg2>...

In particular, I am able to use config.configure_arg("-C /path/to/some/file.cmake") for OP's use case.

[lilianmoraru]

Very nice of me suggesting I am committing to implement it and then not doing it.