Cannot disable warnings in subproject -- warning_level should offer option to pass `-w` to GCC and Clang

In the release notes for Meson 0.50.0 is stated that a warning level of 0 does not enable any static analysis checks. GCC and Clang have a flag that does just that, -w, but it seems that Meson doesn’t pass it to the compiler.

[eli-schwartz]

Disabling warnings in a subproject is an interesting angle that unfortunately wasn’t mentioned in the OP.

And apparently, it turns out you cannot use -Dsubproject:c_args=-w, since c_args is not per subproject. So that shoots down my initial thought on how to do this. Which means adding a warning_level that does it, would be an understandable desire.

[Tachi107]

Looking at the issue tracker it seems that specifying *_args per subproject is something that has been needed/wanted for quite some time.

Even if implementing this using warning_level could be easier, I think what maybe using c_args would be better; passing warning-related options using c_args is a sort of hack, but a negative warning_level would also look like a hack, so if I had to choose I would use an already present hack rather than introducing a new one.

But maybe I’m wrong, who knows