if err != nil {
				t.Fatal(err)
			}
			var files []string
			sawErr := false
			err = fs.WalkDir(z, ".", func(path string, d fs.DirEntry, err error) error {
				if err != nil {
					if !test.wantErr {
						t.Errorf("%s: %v", path, err)
					}
					sawErr = true
					return nil
				}
				files = append(files, path)
				return nil
			})
			if err != nil {

		if n.Kind == "type" && typedef[n.Mangle] == nil {
			typedef[n.Mangle] = n.Type
		}
	}
}

// mangleName does name mangling to translate names
// from the original Go source files to the names
// used in the final Go files generated by cgo.
func (p *Package) mangleName(n *Name) {
	// When using gccgo variables have to be
	// exported so that they become global symbols
	// that the C code can refer to.
	prefix := "_C"