Depending on a C99 system library?

Hi all,
I'm trying to add a systemLibrary to my package but it has C99 syntax (MoltenVK). I added a pkg-config file for it, but I can't get it to work, as the -std=c99 flag is ignored with
"MoltenVK.pc: warning: non whitelisted flag(s): -std=c99".

Any ideas on how to force the tool to use the parameter?


Turns out this is not needed. The original reason why I was trying to do this was because of the following error:

unknown type name 'bool'

I just needed to add #include <stdbool.h> to my shim header.
However after fixing this, I am facing a similar issue:

 error: 'string' file not found

This is coming from one of the header files in my shim, not the shim itself.

But I have no idea why this standard library include is not working.
Given that this is a systemLibrary I can't add cFlags. @compnerd , since you have been playing a crucial role in SwiftPM development, is there anything I could do here?


That sounds like you're trying to include a C++ header, not a C header at all.


You're absolutely right...
I need to stop and reassess my approach here.