Function is_top_level_lib_object 

pub fn is_top_level_lib_object(rel: &str) -> bool

Whether rel (sysroot-relative) is a shared object sitting directly in a distribution library directory.

A host package owning such a file serves the host, not the bundle: its other files, Mesa’s gallium and DRI drivers say, exist for that library, and so does what only it depended on.