// this .so into itself.
			base := filepath.Base(p.Shlib)
			if base != targetBase {
				haveShlib[base] = true
			}
		}
	}

	// Arrange the deps into afiles and shlibs.
	addedShlib := make(map[string]bool)
	for _, a := range root.Deps {
		p := a.Package
		if p != nil && p.Shlib != "" && haveShlib[filepath.Base(p.Shlib)] {
			// This is a package linked into a shared

	// in addition to the packages themselves. (The compile steps do not.)
	if cfg.BuildLinkshared {
		haveShlib := map[string]bool{shlib: true}
		for _, a1 := range a.Deps {
			p1 := a1.Package
			if p1 == nil || p1.Shlib == "" || haveShlib[filepath.Base(p1.Shlib)] {
				continue
			}
			haveShlib[filepath.Base(p1.Shlib)] = true
			// TODO(rsc): The use of ModeInstall here is suspect, but if we only do ModeBuild,

func addelflib(list **Elflib, file string, vers string) *Elfaux {
	var lib *Elflib

	for lib = *list; lib != nil; lib = lib.next {
		if lib.file == file {
			goto havelib
		}
	}
	lib = new(Elflib)
	lib.next = *list
	lib.file = file
	*list = lib

havelib:
	for aux := lib.aux; aux != nil; aux = aux.next {
		if aux.vers == vers {
			return aux
		}
	}
	aux := new(Elfaux)
	aux.next = lib.aux