Function link_binary 

pub fn link_binary(
    sess: &Session,
    archive_builder_builder: &dyn ArchiveBuilderBuilder,
    codegen_results: CodegenResults,
    metadata: EncodedMetadata,
    outputs: &OutputFilenames,
    codegen_backend: &'static str,
)

Performs the linkage portion of the compilation phase. This will generate all of the requested outputs for this compilation session.