t.Fatal(err)
	}

	// Link with -v -linkmode=external to see the flags we pass to the
	// external linker.
	ldflags := "-ldflags=-v -linkmode=external -tmpdir=" + linktmp
	var out0 []byte
	for i := 0; i < 5; i++ {
		cmd := testenv.Command(t, testenv.GoToolPath(t), "build", ldflags, "-o", exe, src)
		out, err := cmd.CombinedOutput()
		if err != nil {

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Fchflags(fd int, flags int) (err error) {
	_, _, e1 := syscall_syscall(libc_fchflags_trampoline_addr, uintptr(fd), uintptr(flags), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

var libc_fchflags_trampoline_addr uintptr

//go:cgo_import_dynamic libc_fchflags fchflags "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Fchflags(fd int, flags int) (err error) {
	_, _, e1 := syscall_syscall(libc_fchflags_trampoline_addr, uintptr(fd), uintptr(flags), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

var libc_fchflags_trampoline_addr uintptr

//go:cgo_import_dynamic libc_fchflags fchflags "libc.so"

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

//sys	Dup(fd int) (nfd int, err error)
//sys	Dup2(from int, to int) (err error)
//sys	Exchangedata(path1 string, path2 string, options int) (err error)
//sys	Exit(code int)
//sys	Faccessat(dirfd int, path string, mode uint32, flags int) (err error)
//sys	Fchdir(fd int) (err error)
//sys	Fchflags(fd int, flags int) (err error)
//sys	Fchmod(fd int, mode uint32) (err error)

	SYS_ACCESS                   = 33  // { int access(char *path, int amode); }
	SYS_CHFLAGS                  = 34  // { int chflags(const char *path, u_long flags); }
	SYS_FCHFLAGS                 = 35  // { int fchflags(int fd, u_long flags); }
	SYS_SYNC                     = 36  // { int sync(void); }
	SYS_KILL                     = 37  // { int kill(int pid, int signum); }

	SYS_ACCESS                   = 33  // { int access(char *path, int amode); }
	SYS_CHFLAGS                  = 34  // { int chflags(const char *path, u_long flags); }
	SYS_FCHFLAGS                 = 35  // { int fchflags(int fd, u_long flags); }
	SYS_SYNC                     = 36  // { int sync(void); }
	SYS_KILL                     = 37  // { int kill(int pid, int signum); }

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Fchflags(fd int, flags int) (err error) {
	_, _, e1 := syscall(abi.FuncPCABI0(libc_fchflags_trampoline), uintptr(fd), uintptr(flags), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func libc_fchflags_trampoline()

//go:cgo_import_dynamic libc_fchflags fchflags "/usr/lib/libSystem.B.dylib"

	SYS_ACCESS                   = 33  // { int access(char *path, int amode); }
	SYS_CHFLAGS                  = 34  // { int chflags(const char *path, u_long flags); }
	SYS_FCHFLAGS                 = 35  // { int fchflags(int fd, u_long flags); }
	SYS_SYNC                     = 36  // { int sync(void); }
	SYS_KILL                     = 37  // { int kill(int pid, int signum); }

// optimize ADCSflags, SBCSflags and friends
(ADCSflags x y (Select1 <types.TypeFlags> (ADDSconstflags [-1] (ADCzerocarry <typ.UInt64> c)))) => (ADCSflags x y c)
(ADCSflags x y (Select1 <types.TypeFlags> (ADDSconstflags [-1] (MOVDconst [0])))) => (ADDSflags x y)
(SBCSflags x y (Select1 <types.TypeFlags> (NEGSflags (NEG <typ.UInt64> (NGCzerocarry <typ.UInt64> bo))))) => (SBCSflags x y bo)

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func Fchflags(fd int, flags int) (err error) {
	_, _, e1 := syscall(abi.FuncPCABI0(libc_fchflags_trampoline), uintptr(fd), uintptr(flags), 0)
	if e1 != 0 {
		err = errnoErr(e1)
	}
	return
}

func libc_fchflags_trampoline()

//go:cgo_import_dynamic libc_fchflags fchflags "/usr/lib/libSystem.B.dylib"