<lang>_args arguments for declare_dependency()

[georgev93]

Is there any reason why there couldn't be a _args argument for declare_dependency()? I use the declare_dependency() function for a lot of unit tested C libraries where the tests are written in C++, therefore, these unit tested modules often have both C and C++ compile args.

[eli-schwartz]

This is something that @dcbaker is trying to work on in the long term.

[dcbaker]

Yeah, this is something I'm working on. One thing I don't want to do is repeat the mistake we made with include directories (see: #10122) where declare_dependency() and dependency() do different things. So we need to fix all of the dependencies at once

[xclaesse]

I agree, compile_args is both confusing and broken, as far as I know that's just historical reasons that we should fix.