// in cmd/go, and are documented in 'go help buildmode'.
type BuildMode uint8

const (
	BuildModeUnset BuildMode = iota
	BuildModeExe
	BuildModePIE
	BuildModeCArchive
	BuildModeCShared
	BuildModeShared
	BuildModePlugin
)

// Set implements flag.Value to set the build mode based on the argument
// to the -buildmode flag.
func (mode *BuildMode) Set(s string) error {

}

// UseRelro reports whether to make use of "read only relocations" aka
// relro.
func (t *Target) UseRelro() bool {
	switch t.BuildMode {
	case BuildModeCArchive, BuildModeCShared, BuildModeShared, BuildModePIE, BuildModePlugin:
		return t.IsELF || t.HeadType == objabi.Haix || t.HeadType == objabi.Hdarwin
	default:
		if t.HeadType == objabi.Hdarwin && t.IsARM64() {

// and given that restriction, orders the inittasks in
// lexicographic order.
func (ctxt *Link) inittasks() {
	switch ctxt.BuildMode {
	case BuildModeExe, BuildModePIE, BuildModeCArchive, BuildModeCShared:
		// Normally the inittask list will be run on program startup.
		ctxt.mainInittasks = ctxt.inittaskSym([]string{"main..inittask"}, "go:main.inittasks")
	case BuildModePlugin:

			}

			s := l.LookupOrCreateSym(local, sym.ABIToVersion(abi))

			if l.SymType(s) == sym.SHOSTOBJ {
				hostObjSyms[s] = struct{}{}
			}

			switch ctxt.BuildMode {
			case BuildModeCShared, BuildModeCArchive, BuildModePlugin:
				if s == l.Lookup("main", 0) {
					continue
				}
			}

			// export overrides import, for openbsd/cgo.
			// see issue 4878.
			if l.SymDynimplib(s) != "" {

	"cmd/link/internal/sym"
	"debug/elf"
	"log"
)

func gentext(ctxt *ld.Link, ldr *loader.Loader) {
	if ctxt.DynlinkingGo() {
		// We need get_pc_thunk.
	} else {
		switch ctxt.BuildMode {
		case ld.BuildModeCArchive:
			if !ctxt.IsELF {
				return
			}
		case ld.BuildModePIE, ld.BuildModeCShared, ld.BuildModePlugin:
			// We need get_pc_thunk.
		default:
			return
		}
	}

		n++
	}
	return t.Sym(), uint32(n)
}

func (ctxt *Link) symtab(pcln *pclntab) []sym.SymKind {
	ldr := ctxt.loader

	if !ctxt.IsAIX() {
		switch ctxt.BuildMode {
		case BuildModeCArchive, BuildModeCShared:
			s := ldr.Lookup(*flagEntrySymbol, sym.SymVerABI0)
			if s != 0 {
				addinitarrdata(ctxt, ldr, s)
			}
		}
	}

	// Define these so that they'll get put into the symbol table.

	if err := ctxt.Out.Open(*flagOutfile); err != nil {
		Exitf("cannot create %s: %v", *flagOutfile, err)
	}

	if *flagEntrySymbol == "" {
		switch ctxt.BuildMode {
		case BuildModeCShared, BuildModeCArchive:
			*flagEntrySymbol = fmt.Sprintf("_rt0_%s_%s_lib", buildcfg.GOARCH, buildcfg.GOOS)
		case BuildModeExe, BuildModePIE:
			*flagEntrySymbol = fmt.Sprintf("_rt0_%s_%s", buildcfg.GOARCH, buildcfg.GOOS)

						ctxt.Errorf(s, "odd offset in dynlink direct call: %v+%d", ldr.SymName(rs), offset)
					}
					gentrampdyn(ctxt.Arch, trampb, rs, int64(offset))
				} else if ctxt.BuildMode == ld.BuildModeCArchive || ctxt.BuildMode == ld.BuildModeCShared || ctxt.BuildMode == ld.BuildModePIE {
					gentramppic(ctxt.Arch, trampb, rs, int64(offset))
				} else {
					gentramp(ctxt.Arch, ctxt.LinkMode, ldr, trampb, rs, int64(offset))

		Errorf(nil, "unknown XCOFF outer symbol for type %s", stype.String())
	case sym.SRODATA, sym.SRODATARELRO, sym.SFUNCTAB, sym.SSTRING:
		// Nothing to do
	case sym.STYPERELRO:
		if ctxt.UseRelro() && (ctxt.BuildMode == BuildModeCArchive || ctxt.BuildMode == BuildModeCShared || ctxt.BuildMode == BuildModePIE) {
			// runtime.types size must be removed, as it's a real symbol.
			tsize := ldr.SymSize(ldr.Lookup("runtime.types", 0))

			shstrtabAddstring(".note.go.pkg-list")
			shstrtabAddstring(".note.go.deps")
		}
	}

	hasinitarr := ctxt.linkShared

	/* shared library initializer */
	switch ctxt.BuildMode {
	case BuildModeCArchive, BuildModeCShared, BuildModeShared, BuildModePlugin:
		hasinitarr = true
	}

	if hasinitarr {
		shstrtabAddstring(".init_array")
		shstrtabAddstring(elfRelType + ".init_array")
	}