the Gerrit change.

**Please ensure you adhere to every item in this list.**

More info can be found at https://github.com/golang/go/wiki/CommitMessage

+ The PR title is formatted as follows: `net/http: frob the quux before blarfing`
  + The package name goes before the colon
  + The part after the colon uses the verb tense + phrase that completes the blank in,
    "This change modifies Go to ___________"

</p>

<p>
Several backslash escapes allow arbitrary values to be encoded as
ASCII text.  There are four ways to represent the integer value
as a numeric constant: <code>\x</code> followed by exactly two hexadecimal
digits; <code>\u</code> followed by exactly four hexadecimal digits;
<code>\U</code> followed by exactly eight hexadecimal digits, and a
plain backslash <code>\</code> followed by exactly three octal digits.

pkg syscall (darwin-arm64), const O_NDELAY = 4
pkg syscall (darwin-arm64), const O_NDELAY ideal-int
pkg syscall (darwin-arm64), const O_NOCTTY = 131072
pkg syscall (darwin-arm64), const O_NOFOLLOW = 256
pkg syscall (darwin-arm64), const O_NOFOLLOW ideal-int
pkg syscall (darwin-arm64), const O_NONBLOCK = 4
pkg syscall (darwin-arm64), const O_POPUP = 2147483648
pkg syscall (darwin-arm64), const O_POPUP ideal-int

pkg syscall (freebsd-arm64), const O_NDELAY = 4
pkg syscall (freebsd-arm64), const O_NDELAY ideal-int
pkg syscall (freebsd-arm64), const O_NOCTTY = 32768
pkg syscall (freebsd-arm64), const O_NOFOLLOW = 256
pkg syscall (freebsd-arm64), const O_NOFOLLOW ideal-int
pkg syscall (freebsd-arm64), const O_NONBLOCK = 4
pkg syscall (freebsd-arm64), const O_SHLOCK = 16
pkg syscall (freebsd-arm64), const O_SHLOCK ideal-int

	fmt.Fprintf(&buf, "// %s %s\n", filepath.Base(args[0]), strings.Join(args[1:], " "))
	fmt.Fprintf(&buf, "\n")

	override := make(map[string]string)

	// Allow source file to specify override mappings.
	// For example, the socket data structures refer
	// to in_addr and in_addr6 structs but we want to be
	// able to treat them as byte arrays, so the godefs

}

// ScanLines is a split function for a [Scanner] that returns each line of
// text, stripped of any trailing end-of-line marker. The returned line may
// be empty. The end-of-line marker is one optional carriage return followed
// by one mandatory newline. In regular expression notation, it is `\r?\n`.
// The last non-empty line of input will be returned even if it has no
// newline.

pkg syscall (freebsd-riscv64), const O_NDELAY ideal-int #53466
pkg syscall (freebsd-riscv64), const O_NOCTTY = 32768 #53466
pkg syscall (freebsd-riscv64), const O_NOFOLLOW = 256 #53466
pkg syscall (freebsd-riscv64), const O_NOFOLLOW ideal-int #53466
pkg syscall (freebsd-riscv64), const O_NONBLOCK = 4 #53466
pkg syscall (freebsd-riscv64), const O_SHLOCK = 16 #53466

		sr := s[i]
		tr := t[i]
		if sr|tr >= utf8.RuneSelf {
			goto hasUnicode
		}

		// Easy case.
		if tr == sr {
			continue
		}

		// Make sr < tr to simplify what follows.
		if tr < sr {
			tr, sr = sr, tr
		}
		// ASCII only, sr/tr must be upper/lower case
		if 'A' <= sr && sr <= 'Z' && tr == sr+'a'-'A' {
			continue
		}
		return false
	}

pkg syscall (linux-386), const IN_CREATE = 256
pkg syscall (linux-386), const IN_DELETE = 512
pkg syscall (linux-386), const IN_DELETE_SELF = 1024
pkg syscall (linux-386), const IN_DONT_FOLLOW = 33554432
pkg syscall (linux-386), const IN_EXCL_UNLINK = 67108864
pkg syscall (linux-386), const IN_IGNORED = 32768
pkg syscall (linux-386), const IN_ISDIR = 1073741824

}

func (in *Input) Text() string {
	return in.text
}

// hash processes a # preprocessor directive. It reports whether it completes.
func (in *Input) hash() bool {
	// We have a '#'; it must be followed by a known word (define, include, etc.).
	tok := in.Stack.Next()
	if tok != scanner.Ident {
		in.expectText("expected identifier after '#'")
	}
	if !in.enabled() {