m := map[loader.Sym]int{}

	// Find all reachable inittask records from the roots.
	// Keep track of the dependency edges between them in edges.
	// Keep track of how many imports each package has in m.
	// q is the list of found but not yet explored packages.
	var q []loader.Sym
	for _, p := range roots {
		m[p] = 0
		q = append(q, p)
	}
	for len(q) > 0 {
		x := q[len(q)-1]

			for i := 0; i < relocs.Count(); i++ {
				d.mark(relocs.At(i).Sym(), 0)
			}
		}
	}

	if d.ctxt.Debugvlog > 1 {
		d.ctxt.Logf("deadcode start names: %v\n", names)
	}

	for _, name := range names {
		// Mark symbol as a data/ABI0 symbol.
		d.mark(d.ldr.Lookup(name, 0), 0)
		if abiInternalVer != 0 {
			// Also mark any Go functions (internal ABI).
			d.mark(d.ldr.Lookup(name, abiInternalVer), 0)
		}
	}

	order := make([]*sym.Library, 0, len(libs)) // hold the result
	mark := make(map[*sym.Library]markKind, len(libs))
	for _, lib := range libs {
		dfs(lib, mark, &order)
	}
	return order
}

func dfs(lib *sym.Library, mark map[*sym.Library]markKind, order *[]*sym.Library) {
	if mark[lib] == visited {
		return
	}
	if mark[lib] == visiting {
		panic("found import cycle while visiting " + lib.Pkg)

	// CanDelayResults reports whether it's safe for the inliner to delay
	// initializing the result parameters until immediately before the
	// "return" statement.
	CanDelayResults bool
}

// A Mark represents a scope boundary.
type Mark struct {
	// Pos is the position of the token that marks the scope
	// change.
	Pos src.XPos

	// Scope identifies the innermost scope to the right of Pos.
	Scope ScopeID
}

			q.Link = p

			if p.Link == nil {
				break // Reached the end, don't bother marking the end
			}
			if isRestartable(p.Link) {
				// Next Prog is also restartable. No need to mark the end
				// of this sequence. We'll just go ahead mark the next one.
				continue
			}
			p = Appendp(p, newprog)
			p.As = APCDATA
			p.From.Type = TYPE_CONST
			p.From.Offset = abi.PCDATA_UnsafePoint
			p.To.Type = TYPE_CONST

	{22, "EINVAL", "invalid argument"},
	{23, "ENFILE", "too many open files in system"},
	{24, "EMFILE", "too many open files"},
	{25, "ENOTTY", "inappropriate ioctl for device"},
	{26, "ETXTBSY", "text file busy"},
	{27, "EFBIG", "file too large"},
	{28, "ENOSPC", "no space left on device"},
	{29, "ESPIPE", "illegal seek"},
	{30, "EROFS", "read-only file system"},
	{31, "EMLINK", "too many links"},
	{32, "EPIPE", "broken pipe"},

	{23, "ENFILE", "too many open files in system"},
	{24, "EMFILE", "too many open files"},
	{25, "ENOTTY", "inappropriate ioctl for device"},
	{26, "ETXTBSY", "text file busy"},
	{27, "EFBIG", "file too large"},
	{28, "ENOSPC", "no space left on device"},
	{29, "ESPIPE", "illegal seek"},
	{30, "EROFS", "read-only file system"},
	{31, "EMLINK", "too many links"},
	{32, "EPIPE", "broken pipe"},

	{23, "ENFILE", "too many open files in system"},
	{24, "EMFILE", "too many open files"},
	{25, "ENOTTY", "inappropriate ioctl for device"},
	{26, "ETXTBSY", "text file busy"},
	{27, "EFBIG", "file too large"},
	{28, "ENOSPC", "no space left on device"},
	{29, "ESPIPE", "illegal seek"},
	{30, "EROFS", "read-only file system"},
	{31, "EMLINK", "too many links"},
	{32, "EPIPE", "broken pipe"},

	{23, "ENFILE", "too many open files in system"},
	{24, "EMFILE", "too many open files"},
	{25, "ENOTTY", "inappropriate ioctl for device"},
	{26, "ETXTBSY", "text file busy"},
	{27, "EFBIG", "file too large"},
	{28, "ENOSPC", "no space left on device"},
	{29, "ESPIPE", "illegal seek"},
	{30, "EROFS", "read-only file system"},
	{31, "EMLINK", "too many links"},
	{32, "EPIPE", "broken pipe"},

	{23, "ENFILE", "too many open files in system"},
	{24, "EMFILE", "too many open files"},
	{25, "ENOTTY", "inappropriate ioctl for device"},
	{26, "ETXTBSY", "text file busy"},
	{27, "EFBIG", "file too large"},
	{28, "ENOSPC", "no space left on device"},
	{29, "ESPIPE", "illegal seek"},
	{30, "EROFS", "read-only file system"},
	{31, "EMLINK", "too many links"},
	{32, "EPIPE", "broken pipe"},