// But when we're dynamically linking, we need all those global symbols.
	if !ctxt.DynlinkingGo() && ctxt.IsExternal() && !ldr.AttrCgoExportStatic(x) && elfshnum != elf.SHN_UNDEF {
		bind = elf.STB_LOCAL
	}

	if ctxt.LinkMode == LinkExternal && elfshnum != elf.SHN_UNDEF {
		addr -= int64(xosect.Vaddr)
	}
	other := int(elf.STV_DEFAULT)
	if ldr.AttrVisibilityHidden(x) {
		// TODO(mwhudson): We only set AttrVisibilityHidden in ldelf, i.e. when

		fdeLength := uint64(4 + 2*d.arch.PtrSize + len(deltaBuf))
		if isdw64 {
			fdeLength += 4 // 4 bytes added for CIE pointer
		}
		d.createUnitLength(fsu, fdeLength)

		if d.linkctxt.LinkMode == LinkExternal {
			d.addDwarfAddrRef(fsu, fs)
		} else {
			d.addDwarfAddrField(fsu, 0) // CIE offset
		}
		addAddrPlus(fsu, d.arch, s, 0)

	mustHaveDWARF(t)

	// Explicitly test external linking, for dsymutil compatibility on Darwin.
	if runtime.GOARCH == "ppc64" {
		t.Skip("-linkmode=external not supported on ppc64")
	}

	testRuntimeTypeAttr(t, "-ldflags=-linkmode=external")
}

func testRuntimeTypeAttr(t *testing.T, flags string) {
	t.Parallel()

	const prog = `
package main

import "unsafe"

type X struct{ _ int }

func main() {

		}
		return "default PIE binary"
	}

	// Using -ldflags=-linkmode=external forces external linking.
	// If there are multiple -linkmode options, the last one wins.
	if p != nil {
		ldflags := BuildLdflags.For(p)
		for i := len(ldflags) - 1; i >= 0; i-- {
			a := ldflags[i]
			if a == "-linkmode=external" ||
				a == "-linkmode" && i+1 < len(ldflags) && ldflags[i+1] == "external" {
				return a

	if d.ctxt.linkShared && (d.ctxt.BuildMode == BuildModeExe || d.ctxt.BuildMode == BuildModePIE) {
		names = append(names, "main.main", "main..inittask")
	} else {
		// The external linker refers main symbol directly.
		if d.ctxt.LinkMode == LinkExternal && (d.ctxt.BuildMode == BuildModeExe || d.ctxt.BuildMode == BuildModePIE) {
			if d.ctxt.HeadType == objabi.Hwindows && d.ctxt.Arch.Family == sys.I386 {
				*flagEntrySymbol = "_main"
			} else {

cgo-wrapped library like sqlite3 can generate a standalone executable
instead of needing to refer to a dynamic library. The specific choice
can be overridden using a command line flag: cmd/link -linkmode=internal or
cmd/link -linkmode=external.

In an external link, cmd/link will create a temporary directory, write any
host object files found in package archives to that directory (renamed

		of the Go toolchain itself. Use beyond that purpose is unsupported.
	GO_EXTLINK_ENABLED
		Whether the linker should use external linking mode
		when using -linkmode=auto with code that uses cgo.
		Set to 0 to disable external linking mode, 1 to enable it.
	GIT_ALLOW_PROTOCOL
		Defined by Git. A colon-separated list of schemes that are allowed

	// try to link internally and should revert to external linking.
	// The token we pass is a suggestion, not a mandate; if a user is
	// explicitly asking for a specific linkmode via the "-linkmode"
	// flag, the token will be ignored. NB: in theory we could ditch
	// the token approach and just pass a flag to the linker when we
	// eventually invoke it, and the linker flag could then be

		ldr.SetAttrReachable(ts, true)
	}
	return ts, firstUse
}

func gentext(ctxt *ld.Link, ldr *loader.Loader) {
	if ctxt.DynlinkingGo() {
		genaddmoduledata(ctxt, ldr)
	}

	if ctxt.LinkMode == ld.LinkInternal {
		genstubs(ctxt, ldr)
	}
}

// Create a calling stub. The stubType maps directly to the properties listed in the ELFv2 1.5
// section 4.2.5.3.
//

        for (Node linkNode : getChildren(findFirstChildNamed(getXml(), "linkedResources"), "link")) {
            Node nameNode = findFirstChildNamed(linkNode, "name");
            Node typeNode = findFirstChildNamed(linkNode, "type");
            Node locationNode = findFirstChildNamed(linkNode, "location");
            Node locationUriNode = findFirstChildNamed(linkNode, "locationURI");