<preamble>
	__typeof__(t1) *__cgo__1;
	__typeof__(v2) *__cgo__2;
	__typeof__(v3) *__cgo__3;
	__typeof__(i4) *__cgo__4;
	enum { __cgo_enum__4 = i4 };
	__typeof__(i5) *__cgo__5;
	enum { __cgo_enum__5 = i5 };
	__typeof__(u6) *__cgo__6;
	enum { __cgo_enum__6 = u6 };
	__typeof__(f7) *__cgo__7;
	__typeof__(f8) *__cgo__8;
	__typeof__(s9) *__cgo__9;
	__typeof__(s10) *__cgo__10;

	// Instead, emit
	//	__typeof__(names[i]) *__cgo__i;
	// for each entry in names and then dereference the type we
	// learn for __cgo__i.
	var b bytes.Buffer
	b.WriteString(builtinProlog)
	b.WriteString(f.Preamble)
	b.WriteString("#line 1 \"cgo-dwarf-inference\"\n")
	for i, n := range names {
		fmt.Fprintf(&b, "__typeof__(%s) *__cgo__%d;\n", n.C, i)
		if n.Kind == "iconst" {