rust/tests/ui/linkage-attr/propagate-generic-issue-18804/auxiliary/lib.rs

#![crate_type = "rlib"]
#![feature(linkage)]

pub fn foo<T>() -> *const () {
    extern "C" {
        #[linkage = "extern_weak"]
        static FOO: *const ();
    }
    unsafe { FOO }
}