// are in hex and half are in whatever the #define used.
				n.Const = fmt.Sprintf("%#x", i)
			} else if n.Define[0] == '\'' {
				if _, err := parser.ParseExpr(n.Define); err == nil {
					n.Kind = "iconst"
					n.Const = n.Define
				}
			} else if n.Define[0] == '"' {
				if _, err := parser.ParseExpr(n.Define); err == nil {
					n.Kind = "sconst"
					n.Const = n.Define
				}
			}

			if n.IsConst() {

		"-D", "GOARCH_" + goarch,
		"-D", "GOOS_GOARCH_" + goos + "_" + goarch,
		"-p", pkg,
	}
	if goarch == "mips" || goarch == "mipsle" {
		// Define GOMIPS_value from gomips.
		asmArgs = append(asmArgs, "-D", "GOMIPS_"+gomips)
	}
	if goarch == "mips64" || goarch == "mips64le" {
		// Define GOMIPS64_value from gomips64.
		asmArgs = append(asmArgs, "-D", "GOMIPS64_"+gomips64)
	}
	if goarch == "ppc64" || goarch == "ppc64le" {

			// in a loadable segment (e.g. the abihash note) but not for
			// notes that we do not want to be mapped (e.g. the package
			// list note). The real fix is probably to define new values
			// for Symbol.Type corresponding to mapped and unmapped notes
			// and handle them in dodata().
			Errorf(nil, "sh.Type == SHT_NOTE in elfshbits when linking internally")
		}

	sa.raw.Ifindex = sa.Ifindex
	sa.raw.Queue_id = sa.QueueID
	sa.raw.Shared_umem_fd = sa.SharedUmemFD

	return unsafe.Pointer(&sa.raw), SizeofSockaddrXDP, nil
}

// This constant mirrors the #define of PX_PROTO_OE in
// linux/if_pppox.h. We're defining this by hand here instead of
// autogenerating through mkerrors.sh because including
// linux/if_pppox.h causes some declaration conflicts with other

//  - Otherwise, if v is in a register at the start of b,
//    put the spill of v at the start of b.
//  - Otherwise, set b = immediate dominator of b, and repeat.
//
// Phi values are special, as always. We define two kinds of phis, those
// where the merge happens in a register (a "register" phi) and those where
// the merge happens in a stack location (a "stack" phi).
//

var SocketDisableIPv6 bool

// Sockaddr represents a socket address.
type Sockaddr interface {
	sockaddr() (ptr unsafe.Pointer, len _Socklen, err error) // lowercase; only we can define Sockaddrs
}

// SockaddrInet4 implements the Sockaddr interface for AF_INET type sockets.
type SockaddrInet4 struct {
	Port int
	Addr [4]byte
	raw  RawSockaddrInet4
}

		// If the module (toolchain-speak for "executable or shared
		// library") we are linking contains the runtime package, it
		// will define the runtime.firstmoduledata symbol and we
		// truncate it back to 0 bytes so we can define its entire
		// contents in symtab.go:symtab().
		mdsb.SetSize(0)

		// In addition, on ARM, the runtime depends on the linker
		// recording the value of GOARM.

	// circular definition loops, so that gdb can understand them.
	die := d.newdie(parent, dwarf.DW_ABRV_TYPEDECL, name)

	d.newrefattr(die, dwarf.DW_AT_type, tds)

	return die
}

// Define gotype, for composite ones recurse into constituents.
func (d *dwctxt) defgotype(gotype loader.Sym) loader.Sym {
	if gotype == 0 {
		return d.mustFind("<unspecified>")
	}

	testenv.MustHaveCGO(t)
	tooSlow(t, "builds a package with cgo dependencies")

	tg := testgo(t)
	defer tg.cleanup()
	tg.parallel()
	tg.tempFile("src/x/a.go", `package main
		// #ifndef VAL
		// #define VAL 0
		// #endif
		// int val = VAL;
		import "C"
		import "fmt"
		func main() { fmt.Println(C.val) }
	`)
	tg.setenv("GOPATH", tg.path("."))
	exe := tg.path("x.exe")

				// If we know that x+delta > w but w is not constant, we can derive:
				//    if delta < 0 and x+delta cannot underflow, then x > w
				// This is useful for loops with bounds "len(slice)-K" (delta = -K)
				if delta < 0 && !underflow {
					ft.update(parent, x, w, signed, r)
				}
			} else {
				// With w,delta constants, we want to derive: x+delta > w  ⇒  x > w-delta
				//