// The .go file will use import "C" and is to be processed by cgo.
	// For -cover test or build runs, this needs to happen after the cover
	// tool is run; we don't want to instrument swig-generated Go files,
	// see issue #64661.
	if p.UsesSwig() {
		outGo, outC, outCXX, err := b.swig(a, objdir, pcCFLAGS)
		if err != nil {
			return err
		}
		cgofiles = append(cgofiles, outGo...)