If CC_FOR_TARGET is not set when the toolchain is built (make.bash or all.bash), CC
can be set on the command line. For example,

	GOOS=ios GOARCH=amd64 CGO_ENABLED=1 CC=$(go env GOROOT)/misc/ios/clangwrap.sh go build

Setting CC is not necessary if the toolchain is built with CC_FOR_TARGET set.

To use the go tool to run individual programs and tests, put $GOROOT/bin into PATH to ensure

pkg syscall (darwin-arm64), const SYS_SETSOCKOPT ideal-int
pkg syscall (darwin-arm64), const SYS_SETTID = 285
pkg syscall (darwin-arm64), const SYS_SETTID ideal-int
pkg syscall (darwin-arm64), const SYS_SETTID_WITH_PID = 311
pkg syscall (darwin-arm64), const SYS_SETTID_WITH_PID ideal-int
pkg syscall (darwin-arm64), const SYS_SETTIMEOFDAY = 122
pkg syscall (darwin-arm64), const SYS_SETTIMEOFDAY ideal-int

pkg syscall (darwin-386), const SYS_SETSID ideal-int
pkg syscall (darwin-386), const SYS_SETSOCKOPT ideal-int
pkg syscall (darwin-386), const SYS_SETTID ideal-int
pkg syscall (darwin-386), const SYS_SETTID_WITH_PID ideal-int
pkg syscall (darwin-386), const SYS_SETTIMEOFDAY ideal-int
pkg syscall (darwin-386), const SYS_SETUID ideal-int
pkg syscall (darwin-386), const SYS_SETWGROUPS ideal-int

The [`asynctimerchan` setting](/pkg/time/#NewTimer) disables this change.
There are no runtime metrics for this change,
This setting may be removed in a future release, Go 1.27 at the earliest.

Go 1.23 changed the mode bits reported by [`os.Lstat`](/pkg/os#Lstat) and [`os.Stat`](/pkg/os#Stat)
for reparse points, which can be controlled with the `winsymlink` setting.

These new behaviors are only enabled when the main Go program
is in a module with a `go.mod` `go` line using Go 1.23.0 or later.
When Go 1.23 builds older programs, the old behaviors remain in effect.
The new [GODEBUG setting](/doc/godebug) [`asynctimerchan=1`](/pkg/time/#NewTimer)
can be used to revert back to asynchronous channel behaviors

pkg syscall (darwin-386), const SYS_SETSGROUPS = 287
pkg syscall (darwin-386), const SYS_SETSID = 147
pkg syscall (darwin-386), const SYS_SETSOCKOPT = 105
pkg syscall (darwin-386), const SYS_SETTID = 285
pkg syscall (darwin-386), const SYS_SETTID_WITH_PID = 311
pkg syscall (darwin-386), const SYS_SETTIMEOFDAY = 122
pkg syscall (darwin-386), const SYS_SETUID = 23
pkg syscall (darwin-386), const SYS_SETWGROUPS = 289

which was a source of many inconsistencies and bugs.
This behavior is controlled by the `winsymlink` setting.
For Go 1.23, it defaults to `winsymlink=1`.
Previous versions default to `winsymlink=0`.

On Windows, [EvalSymlinks] no longer tries to normalize
volumes to drive letters, which was not always even possible.
This behavior is controlled by the `winreadlinkvolume` setting.
For Go 1.23, it defaults to `winreadlinkvolume=1`.

On Windows, [Readlink] no longer tries to normalize volumes
to drive letters, which was not always even possible.
This behavior is controlled by the `winreadlinkvolume` setting.
For Go 1.23, it defaults to `winreadlinkvolume=1`.

reparse points changed. Mount points no longer have [ModeSymlink] set,
and reparse points that are not symlinks, Unix sockets, or dedup files
now always have [ModeIrregular] set.
This behavior is controlled by the `winsymlink` setting.
For Go 1.23, it defaults to `winsymlink=1`.

## Tools {#tools}

### Go command {#go-command}

Setting the `GOROOT_FINAL` environment variable no longer has an effect
([#62047](https://go.dev/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.

### Vet {#vet}

The `go vet` subcommand now includes the