// Scan DWARF info for top-level TagVariable entries with AttrName __cgo__i.
	types := make([]dwarf.Type, len(names))
	r := d.Reader()
	for {
		e, err := r.Next()
		if err != nil {
			fatalf("reading DWARF entry: %s", err)
		}
		if e == nil {
			break
		}
		switch e.Tag {
		case dwarf.TagVariable:
			name, _ := e.Val(dwarf.AttrName).(string)
			// As of https://reviews.llvm.org/D123534, clang

pkg debug/dwarf, const AttrLocation Attr
pkg debug/dwarf, const AttrLowerBound Attr
pkg debug/dwarf, const AttrLowpc Attr
pkg debug/dwarf, const AttrMacroInfo Attr
pkg debug/dwarf, const AttrName Attr
pkg debug/dwarf, const AttrNamelistItem Attr
pkg debug/dwarf, const AttrOrdering Attr
pkg debug/dwarf, const AttrPriority Attr
pkg debug/dwarf, const AttrProducer Attr
pkg debug/dwarf, const AttrPrototyped Attr

pkg debug/dwarf, const AttrLocation = 2
pkg debug/dwarf, const AttrLowerBound = 34
pkg debug/dwarf, const AttrLowpc = 17
pkg debug/dwarf, const AttrMacroInfo = 67
pkg debug/dwarf, const AttrName = 3
pkg debug/dwarf, const AttrNamelistItem = 68
pkg debug/dwarf, const AttrOrdering = 9
pkg debug/dwarf, const AttrPriority = 69
pkg debug/dwarf, const AttrProducer = 37
pkg debug/dwarf, const AttrPrototyped = 39