// It returns library full path if found, or "none" if not found.
func (ctxt *Link) findLibPathCmd(cmd, libname string) string {
	extld := ctxt.extld()
	name, args := extld[0], extld[1:]
	args = append(args, hostlinkArchArgs(ctxt.Arch)...)
	args = append(args, cmd)
	if ctxt.Debugvlog != 0 {
		ctxt.Logf("%s %v\n", extld, args)
	}
	out, err := exec.Command(name, args...).Output()
	if err != nil {
		if ctxt.Debugvlog != 0 {

		}
		link = []string{pathf("%s/link", tooldir)}
		if goos == "android" {
			link = append(link, "-buildmode=pie")
		}
		if goldflags != "" {
			link = append(link, goldflags)
		}
		link = append(link, "-extld="+compilerEnvLookup("CC", defaultcc, goos, goarch))
		link = append(link, "-L="+pathf("%s/pkg/obj/go-bootstrap/%s_%s", goroot, goos, goarch))
		link = append(link, "-o", pathf("%s/%s%s", tooldir, elem, exe))
		targ = len(link) - 1

		switch {
		case ctxt.IsELF:
		case ctxt.HeadType == objabi.Hdarwin:
		case ctxt.HeadType == objabi.Hwindows:
		case ctxt.HeadType == objabi.Haix:
			res, err := dwarf.IsDWARFEnabledOnAIXLd(ctxt.extld())
			if err != nil {
				Exitf("%v", err)
			}
			return res
		default:
			return false
		}
	}

	return true
}