expression <code>x</code>. As with type assertions, <code>x</code> must be of
<a href="#Interface_types">interface type</a>, and each non-interface type
<code>T</code> listed in a case must implement the type of <code>x</code>.
The types listed in the cases of a type switch must all be
<a href="#Type_identity">different</a>.
</p>

<pre class="ebnf">

pkg syscall (darwin-arm64), const SYS_LIO_LISTIO = 320
pkg syscall (darwin-arm64), const SYS_LIO_LISTIO ideal-int
pkg syscall (darwin-arm64), const SYS_LISTEN = 106
pkg syscall (darwin-arm64), const SYS_LISTEN ideal-int
pkg syscall (darwin-arm64), const SYS_LISTXATTR = 240
pkg syscall (darwin-arm64), const SYS_LISTXATTR ideal-int
pkg syscall (darwin-arm64), const SYS_LSEEK = 199

pkg syscall (freebsd-arm64), const SYS_LIO_LISTIO = 257
pkg syscall (freebsd-arm64), const SYS_LIO_LISTIO ideal-int
pkg syscall (freebsd-arm64), const SYS_LISTEN = 106
pkg syscall (freebsd-arm64), const SYS_LISTEN ideal-int
pkg syscall (freebsd-arm64), const SYS_LPATHCONF = 513
pkg syscall (freebsd-arm64), const SYS_LPATHCONF ideal-int
pkg syscall (freebsd-arm64), const SYS_LSEEK = 478

pkg syscall (freebsd-riscv64), const SYS_LIO_LISTIO = 257 #53466
pkg syscall (freebsd-riscv64), const SYS_LIO_LISTIO ideal-int #53466
pkg syscall (freebsd-riscv64), const SYS_LISTEN = 106 #53466
pkg syscall (freebsd-riscv64), const SYS_LISTEN ideal-int #53466
pkg syscall (freebsd-riscv64), const SYS_LPATHCONF = 513 #53466
pkg syscall (freebsd-riscv64), const SYS_LPATHCONF ideal-int #53466

has configured without HTTP/2 support.

## Default GODEBUG Values {#default}

When a GODEBUG setting is not listed in the environment variable,
its value is derived from three sources:
the defaults for the Go toolchain used to build the program,
amended to match the Go version listed in `go.mod`,
and then overridden by explicit `//go:debug` lines in the program.

	"complexfloat":  "float _Complex",
	"complexdouble": "double _Complex",
}

var incomplete = "_cgopackage.Incomplete"

// cname returns the C name to use for C.s.
// The expansions are listed in nameToC and also
// struct_foo becomes "struct foo", and similarly for
// union and enum.
func cname(s string) string {
	if t, ok := nameToC[s]; ok {
		return t
	}

	if strings.HasPrefix(s, "struct_") {

		instructions[s] = obj.As(i)
	}
	for i, s := range ppc64.Anames {
		if obj.As(i) >= obj.A_ARCHSPECIFIC {
			instructions[s] = obj.As(i) + obj.ABasePPC64
		}
	}
	// The opcodes generated by x/arch's ppc64map are listed in
	// a separate slice, add them too.
	for i, s := range ppc64.GenAnames {
		instructions[s] = obj.As(i) + ppc64.AFIRSTGEN
	}
	// Annoying aliases.
	instructions["BR"] = ppc64.ABR

encoding of the machine instructions.
The <code>cmd/internal/obj</code> package takes care of that detail.
</p>

<p>
The instructions for both the 386 and AMD64 architectures are listed in
<code>cmd/internal/obj/x86/a.out.go</code>.
</p>

<p>
The architectures share syntax for common addressing modes such as
<code>(R1)</code> (register indirect),

<a href="#Interface_types">interface type</a>, but not a
<a href="#Type_parameter_declarations">type parameter</a>, and each non-interface type
<code>T</code> listed in a case must implement the type of <code>x</code>.
The types listed in the cases of a type switch must all be
<a href="#Type_identity">different</a>.
</p>

<pre class="ebnf">

	}

	li := imports.(listImports)
	w.stdPackages = li.stdPackages
	w.importDir = li.importDir
	w.importMap = li.importMap
}

// listEnv returns the process environment to use when invoking 'go list' for
// the given context.
func listEnv(c *build.Context) []string {
	if c == nil {
		return os.Environ()
	}

	environ := append(os.Environ(),
		"GOOS="+c.GOOS,
		"GOARCH="+c.GOARCH)