t.Run("lto", func(t *testing.T) { run(t, "testdata/callback", true, "Callback") })
}

func run(t *testing.T, dir string, lto bool, args ...string) {
	runArgs := append([]string{"run", "."}, args...)
	cmd := exec.Command("go", runArgs...)
	cmd.Dir = dir
	if lto {
		// On the builders we're using the default /usr/bin/ld, but
		// that has problems when asking for LTO in particular. Force

		t.Fatalf("error writing go.mod: %v", err)
	}

	// Run the test without PGO to ensure that the test assertions are
	// correct even in the non-optimized version.
	cmd := testenv.CleanCmdEnv(testenv.Command(t, testenv.GoToolPath(t), "test", "."))
	cmd.Dir = dir
	b, err := cmd.CombinedOutput()
	t.Logf("Test without PGO:\n%s", b)
	if err != nil {
		t.Fatalf("Test failed without PGO: %v", err)
	}

      description: |
        Requesting we remove a module here only hides the generated documentation on pkg.go.dev.
        It does not affect the behaviour of proxy.golang.org or the go command.
        Instead we recommend using the retract directive which will be processed by all 3 of the above.

        If you have deleted your repo, please recreate it and publish a retraction.

	// 8: "p2" frameoff -16400 ...
	// 9: "r" frameoff -16408 ...
	//
	tmpdir := t.TempDir()
	src := filepath.Join("testdata", "mergelocals", "integration.go")
	obj := filepath.Join(tmpdir, "p.a")
	out, err := testenv.Command(t, testenv.GoToolPath(t), "tool", "compile",
		"-p=p", "-c", "1", "-o", obj, "-d=mergelocalstrace=2,mergelocals=1",
		src).CombinedOutput()
	if err != nil {
		t.Fatalf("failed to compile: %v\n%s", err, out)
	}

CL 572016 - x/tools CL implemented accepted proposal https://go.dev/issue/65754 for x/tools/go/cfg
a few x/tools CLs tagged and deleted the golang.org/x/tools/cmd/guru command per accepted proposal https://go.dev/issue/65880; an unreleased change and not something that's in scope of Go 1.23 release notes

Vendoring in std and cmd
========================

The Go command maintains copies of external packages needed by the
standard library in the src/vendor and src/cmd/vendor directories.

There are two modules, std and cmd, defined in src/go.mod and
src/cmd/go.mod. When a package outside std or cmd is imported
by a package inside std or cmd, the import path is interpreted
as if it had a "vendor/" prefix. For example, within "crypto/tls",

code.
For backward compatibility, existing usages of `//go:linkname` found in
a large open-source code corpus remain supported.
Any new references to standard library internal symbols will be disallowed.

A linker command line flag `-checklinkname=0` can be used to disable
this check, for debugging and experimenting purposes.

<!-- CL 473495 -->
When building a dynamically linked ELF binary (including PIE binary), the

	}

	testenv.MustHaveGoBuild(t)
	gocmd := testenv.GoToolPath(t)
	tmpdir := t.TempDir()
	source := filepath.Join("testdata", "fma.go")
	output := filepath.Join(tmpdir, "fma.exe")
	cmd := testenv.Command(t, gocmd, "build", "-o", output, source)
	// The hash-dependence on file path name is dodged by specifying "all hashes ending in 1" plus "all hashes ending in 0"

## Tools {#tools}

### Go command {#go-command}

Setting the `GOROOT_FINAL` environment variable no longer has an effect
([#62047](/issue/62047)).
Distributions that install the `go` command to a location other than
`$GOROOT/bin/go` should install a symlink instead of relocating
or copying the `go` binary.

<!-- go.dev/issue/34208, CL 563137, CL 586095 -->
The new `go` `env` `-changed` flag causes the command to print only

## Tools {#tools}

### Go command {#go-command}