}

		// Compute external relocations on the go, and pass to Machoreloc1
		// to stream out.
		relocs := ldr.Relocs(s)
		for ri := 0; ri < relocs.Count(); ri++ {
			r := relocs.At(ri)
			rr, ok := extreloc(ctxt, ldr, s, r)
			if !ok {
				continue
			}
			if rr.Xsym == 0 {
				ldr.Errorf(s, "missing xsym in relocation")
				continue
			}
			if !ldr.AttrReachable(rr.Xsym) {

		case macho.LoadCmdDysymtab:
			err = machoUpdateLoadCommand(reader, linkseg, linkoffset, &macho.DysymtabCmd{}, "Tocoffset", "Modtaboff", "Extrefsymoff", "Indirectsymoff", "Extreloff", "Locreloff")
		case LC_CODE_SIGNATURE, LC_SEGMENT_SPLIT_INFO, LC_FUNCTION_STARTS, LC_DATA_IN_CODE, LC_DYLIB_CODE_SIGN_DRS,
			LC_DYLD_EXPORTS_TRIE, LC_DYLD_CHAINED_FIXUPS: