[swift-build-dev] How to specify system header dependencies

[Evan Maloney]

Hello,

I have a project that has a dependency on the asl.h system header.

This header is present on all Apple platforms. When building with Xcode, this dependency is specified in the bridging header, allowing the C API provided by asl.h to be exposed to Swift.

As far as I can tell, there's no way to specify a bridging header using the Swift Package Manager or to otherwise specify a C API to expose to Swift.

Am I mistaken? Am I just missing something? Or is SPM only intended to be used to build something in "pure Swift"?

Thanks,
Evan