// problems if we are using internal linking (for example, use of
	// plugins, LTO, etc) by calling a helper routine that builds on
	// the existing CGO flags allow-lists. If we see anything
	// suspicious, emit a special token file "preferlinkext" (known to
	// the linker) in the object file to signal the that it should not
	// try to link internally and should revert to external linking.