}
	case "darwin", "ios":
		f, err := macho.Open(obj)
		if err != nil {
			t.Fatal(err)
		}
		defer f.Close()
		if f.Flags&macho.FlagDyldLink == 0 {
			t.Error("PIE must have DyldLink flag, but not")
		}
		if f.Flags&macho.FlagPIE == 0 {
			t.Error("PIE must have PIE flag, but not")
		}
	case "windows":
		f, err := pe.Open(obj)
		if err != nil {
			t.Fatal(err)
		}
		defer f.Close()

			// Generate a PIC stub. This is ugly as the stub must determine its location using
			// POWER8 or older instruction. These stubs are likely the combination of using
			// GOPPC64 < 8 and linking external objects built with CFLAGS="... -mcpu=power10 ..."
			stub.AddUint32(ctxt.Arch, OP_MFLR_R0)  // mflr r0
			stub.AddUint32(ctxt.Arch, OP_BCL_NIA)  // bcl 20,31,1f

					f.NoEscapes[funcName] = true
				}
			}
		}
	}
	f.Preamble = strings.Join(linesOut, "\n")
}

// addToFlag appends args to flag.
func (p *Package) addToFlag(flag string, args []string) {
	if flag == "CFLAGS" {
		// We'll also need these when preprocessing for dwarf information.
		// However, discard any -g options: we need to be able
		// to parse the debug info, so stick to what we expect.

			cmdline := []string{"build", "-gcflags", "-S=2"}

			// Append flags, but don't override -gcflags=-S=2; add to it instead.
			for i := 0; i < len(flags); i++ {
				flag := flags[i]
				switch {
				case strings.HasPrefix(flag, "-gcflags="):
					cmdline[2] += " " + strings.TrimPrefix(flag, "-gcflags=")
				case strings.HasPrefix(flag, "--gcflags="):

	Fsymptr  uint64 // Byte offset to symbol table start
	Fopthdr  uint16 // Number of bytes in optional header
	Fflags   uint16 // Flags
	Fnsyms   int32  // Number of entries in symbol table
}

const (
	U64_TOCMAGIC = 0767 // AIX 64-bit XCOFF
)

// Flags that describe the type of the object file.
const (
	F_RELFLG    = 0x0001
	F_EXEC      = 0x0002
	F_LNNO      = 0x0004
	F_FDPR_PROF = 0x0010

	}
	if opts.cpu != "" {
		run = append(run, "-cpu="+opts.cpu)
	}
	if t.json {
		run = append(run, "-json")
	}

	if opts.gcflags != "" {
		build = append(build, "-gcflags=all="+opts.gcflags)
	}
	if opts.ldflags != "" {
		build = append(build, "-ldflags="+opts.ldflags)
	}
	if opts.buildmode != "" {
		build = append(build, "-buildmode="+opts.buildmode)
	}

	pkgs = opts.packages()

		{name: "ADDSconstflags", argLength: 1, reg: gp11flags, typ: "(UInt64,Flags)", asm: "ADDS", aux: "Int64"},      // arg0+auxint, set flags.
		{name: "ADDSflags", argLength: 2, reg: gp21flags, typ: "(UInt64,Flags)", asm: "ADDS", commutative: true},      // arg0+arg1, set flags.
		{name: "SUB", argLength: 2, reg: gp21, asm: "SUB"},                                                            // arg0 - arg1

	}
	return fanotifyMark(fd, flags, mask, dirFd, p)
}

//sys	fchmodat(dirfd int, path string, mode uint32) (err error)
//sys	fchmodat2(dirfd int, path string, mode uint32, flags int) (err error)

func Fchmodat(dirfd int, path string, mode uint32, flags int) error {
	// Linux fchmodat doesn't support the flags parameter, but fchmodat2 does.
	// Try fchmodat2 if flags are specified.
	if flags != 0 {

			ehdr.Flags = 1 /* Version 1 ABI */
		} else {
			ehdr.Flags = 2 /* Version 2 ABI */
		}
		fallthrough
	case sys.AMD64, sys.ARM64, sys.Loong64, sys.MIPS64, sys.RISCV64:
		if ctxt.Arch.Family == sys.MIPS64 {
			ehdr.Flags = 0x20000004 /* MIPS 3 CPIC */
		}
		if ctxt.Arch.Family == sys.Loong64 {
			ehdr.Flags = 0x43 /* DOUBLE_FLOAT, OBJABI_V1 */
		}

		mode |= O_RDONLY
	}
	return open(path, mode, perm)
}

//sys	openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) = SYS___OPENAT_A

func Openat(dirfd int, path string, flags int, mode uint32) (fd int, err error) {
	if flags&O_ACCMODE == 0 {
		flags |= O_RDONLY
	}
	return openat(dirfd, path, flags, mode)
}