Problem using systemLibrary target

[Spencer_Kohan]

So I am trying to link to a static library from a Swift package running inside a docker container.

I have done the following:

1. built the library using make as a libfoo.a file

2. created a foo.pc file (pkg-config) to specify the appropriate include and linking flags:

   prefix=/
   libdir={prefix}/lib includedir={prefix}/include

   Name: foo
   Version: 1.0.0
   Cflags: -I${libdir} -I${includedir}
   Libs: -L${libdir} -lawsiot

3. added the path to foo.pc to my PKG_CONFIG_PATH

   ENV PKG_CONFIG_PATH=$LIB_PATH

4. specified the library as a system library target in my Package.swift

    .systemLibrary(
        name: "Foo", 
        pkgConfig: "foo")
   

When I try to build this project, I get the following error:

'swift-client' /swift-client: error: Source files for target Foo should be located under 'Sources/Foo', or a custom sources path can be set with the 'path' property in Package.swift

Is there something I am missing in order to make this work?

[Buttaface]

I don't think you're doing it right, check out the SPM docs.