I was really impressed with https://github.com/apple/swift-evolution/blob/master/proposals/0238-package-manager-build-settings.md however, it doesn't look like I can add the following flags into my library:
-Xswiftc -I/usr/local/include/<somelib>/ and
-Xlinker -L/usr/local/lib without going through unsafe flags which disallows my library to be used as a dependency.
Can these flags be added? Or is there a way to express them in a modulemap?