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    pub type pthread_t = c_ulong;
    pub type __priority_which_t = ::c_uint;
    pub type __rlimit_resource_t = ::c_uint;

    s! {
        pub struct statx {
            pub stx_mask: u32,
            pub stx_blksize: u32,
            pub stx_attributes: u64,
            pub stx_nlink: u32,
            pub stx_uid: u32,
            pub stx_gid: u32,
            pub stx_mode: u16,
            pub __statx_pad1: [u16; 1],
            pub stx_ino: u64,
            pub stx_size: u64,
            pub stx_blocks: u64,
            pub stx_attributes_mask: u64,
            pub stx_atime: ::statx_timestamp,
            pub stx_btime: ::statx_timestamp,
            pub stx_ctime: ::statx_timestamp,
            pub stx_mtime: ::statx_timestamp,
            pub stx_rdev_major: u32,
            pub stx_rdev_minor: u32,
            pub stx_dev_major: u32,
            pub stx_dev_minor: u32,
            pub __statx_pad2: [u64; 14],
        }

        pub struct statx_timestamp {
            pub tv_sec: i64,
            pub tv_nsec: u32,
            pub __statx_timestamp_pad1: [i32; 1],
        }

        pub struct aiocb {
            pub aio_fildes: ::c_int,
            pub aio_lio_opcode: ::c_int,
            pub aio_reqprio: ::c_int,
            pub aio_buf: *mut ::c_void,
            pub aio_nbytes: ::size_t,
            pub aio_sigevent: ::sigevent,
            __next_prio: *mut aiocb,
            __abs_prio: ::c_int,
            __policy: ::c_int,
            __error_code: ::c_int,
            __return_value: ::ssize_t,
            pub aio_offset: off_t,
            #[cfg(all(not(target_arch = "x86_64"), target_pointer_width = "32"))]
            __unused1: [::c_char; 4],
            __glibc_reserved: [::c_char; 32]
        }

        pub struct __exit_status {
            pub e_termination: ::c_short,
            pub e_exit: ::c_short,
        }

        pub struct __timeval {
            pub tv_sec: i32,
            pub tv_usec: i32,
        }

        pub struct glob64_t {
            pub gl_pathc: ::size_t,
            pub gl_pathv: *mut *mut ::c_char,
            pub gl_offs: ::size_t,
            pub gl_flags: ::c_int,

            __unused1: *mut ::c_void,
            __unused2: *mut ::c_void,
            __unused3: *mut ::c_void,
            __unused4: *mut ::c_void,
            __unused5: *mut ::c_void,
        }

        pub struct msghdr {
            pub msg_name: *mut ::c_void,
            pub msg_namelen: ::socklen_t,
            pub msg_iov: *mut ::iovec,
            pub msg_iovlen: ::size_t,
            pub msg_control: *mut ::c_void,
            pub msg_controllen: ::size_t,
            pub msg_flags: ::c_int,
        }

        pub struct cmsghdr {
            pub cmsg_len: ::size_t,
            pub cmsg_level: ::c_int,
            pub cmsg_type: ::c_int,
        }

        pub struct termios {
            pub c_iflag: ::tcflag_t,
            pub c_oflag: ::tcflag_t,
            pub c_cflag: ::tcflag_t,
            pub c_lflag: ::tcflag_t,
            pub c_line: ::cc_t,
            pub c_cc: [::cc_t; ::NCCS],
            #[cfg(not(any(
                target_arch = "sparc64",
                target_arch = "mips",
                target_arch = "mips64")))]
            pub c_ispeed: ::speed_t,
            #[cfg(not(any(
                target_arch = "sparc64",
                target_arch = "mips",
                target_arch = "mips64")))]
            pub c_ospeed: ::speed_t,
        }

        pub struct mallinfo {
            pub arena: ::c_int,
            pub ordblks: ::c_int,
            pub smblks: ::c_int,
            pub hblks: ::c_int,
            pub hblkhd: ::c_int,
            pub usmblks: ::c_int,
            pub fsmblks: ::c_int,
            pub uordblks: ::c_int,
            pub fordblks: ::c_int,
            pub keepcost: ::c_int,
        }

        pub struct nlmsghdr {
            pub nlmsg_len: u32,
            pub nlmsg_type: u16,
            pub nlmsg_flags: u16,
            pub nlmsg_seq: u32,
            pub nlmsg_pid: u32,
        }

        pub struct nlmsgerr {
            pub error: ::c_int,
            pub msg: nlmsghdr,
        }

        pub struct nl_pktinfo {
            pub group: u32,
        }

        pub struct nl_mmap_req {
            pub nm_block_size: ::c_uint,
            pub nm_block_nr: ::c_uint,
            pub nm_frame_size: ::c_uint,
            pub nm_frame_nr: ::c_uint,
        }

        pub struct nl_mmap_hdr {
            pub nm_status: ::c_uint,
            pub nm_len: ::c_uint,
            pub nm_group: u32,
            pub nm_pid: u32,
            pub nm_uid: u32,
            pub nm_gid: u32,
        }

        pub struct nlattr {
            pub nla_len: u16,
            pub nla_type: u16,
        }

        pub struct rtentry {
            pub rt_pad1: ::c_ulong,
            pub rt_dst: ::sockaddr,
            pub rt_gateway: ::sockaddr,
            pub rt_genmask: ::sockaddr,
            pub rt_flags: ::c_ushort,
            pub rt_pad2: ::c_short,
            pub rt_pad3: ::c_ulong,
            pub rt_tos: ::c_uchar,
            pub rt_class: ::c_uchar,
            #[cfg(target_pointer_width = "64")]
            pub rt_pad4: [::c_short; 3usize],
            #[cfg(not(target_pointer_width = "64"))]
            pub rt_pad4: ::c_short,
            pub rt_metric: ::c_short,
            pub rt_dev: *mut ::c_char,
            pub rt_mtu: ::c_ulong,
            pub rt_window: ::c_ulong,
            pub rt_irtt: ::c_ushort,
        }
    }

    impl siginfo_t {
        pub unsafe fn si_addr(&self) -> *mut ::c_void {
            #[repr(C)]
            struct siginfo_sigfault {
                _si_signo: ::c_int,
                _si_errno: ::c_int,
                _si_code: ::c_int,
                si_addr: *mut ::c_void,
            }
            (*(self as *const siginfo_t as *const siginfo_sigfault)).si_addr
        }

        pub unsafe fn si_value(&self) -> ::sigval {
            #[repr(C)]
            struct siginfo_timer {
                _si_signo: ::c_int,
                _si_errno: ::c_int,
                _si_code: ::c_int,
                _si_tid: ::c_int,
                _si_overrun: ::c_int,
                si_sigval: ::sigval,
            }
            (*(self as *const siginfo_t as *const siginfo_timer)).si_sigval
        }
    }

    s_no_extra_traits! {
        pub struct utmpx {
            pub ut_type: ::c_short,
            pub ut_pid: ::pid_t,
            pub ut_line: [::c_char; __UT_LINESIZE],
            pub ut_id: [::c_char; 4],

            pub ut_user: [::c_char; __UT_NAMESIZE],
            pub ut_host: [::c_char; __UT_HOSTSIZE],
            pub ut_exit: __exit_status,

            #[cfg(any(target_arch = "aarch64",
                      target_arch = "s390x",
                      all(target_pointer_width = "32",
                          not(target_arch = "x86_64"))))]
            pub ut_session: ::c_long,
            #[cfg(any(target_arch = "aarch64",
                      target_arch = "s390x",
                      all(target_pointer_width = "32",
                          not(target_arch = "x86_64"))))]
            pub ut_tv: ::timeval,

            #[cfg(not(any(target_arch = "aarch64",
                          target_arch = "s390x",
                          all(target_pointer_width = "32",
                              not(target_arch = "x86_64")))))]
            pub ut_session: i32,
            #[cfg(not(any(target_arch = "aarch64",
                          target_arch = "s390x",
                          all(target_pointer_width = "32",
                              not(target_arch = "x86_64")))))]
            pub ut_tv: __timeval,

            pub ut_addr_v6: [i32; 4],
            __glibc_reserved: [::c_char; 20],
        }
    }

    cfg_if! {
        if #[cfg(feature = "extra_traits")] {
            impl PartialEq for utmpx {
                fn eq(&self, other: &utmpx) -> bool {
                    self.ut_type == other.ut_type
                        && self.ut_pid == other.ut_pid
                        && self.ut_line == other.ut_line
                        && self.ut_id == other.ut_id
                        && self.ut_user == other.ut_user
                        && self
                        .ut_host
                        .iter()
                        .zip(other.ut_host.iter())
                        .all(|(a,b)| a == b)
                        && self.ut_exit == other.ut_exit
                        && self.ut_session == other.ut_session
                        && self.ut_tv == other.ut_tv
                        && self.ut_addr_v6 == other.ut_addr_v6
                        && self.__glibc_reserved == other.__glibc_reserved
                }
            }

            impl Eq for utmpx {}

            impl ::fmt::Debug for utmpx {
                fn fmt(&self, f: &mut ::fmt::Formatter) -> ::fmt::Result {
                    f.debug_struct("utmpx")
                        .field("ut_type", &self.ut_type)
                        .field("ut_pid", &self.ut_pid)
                        .field("ut_line", &self.ut_line)
                        .field("ut_id", &self.ut_id)
                        .field("ut_user", &self.ut_user)
                    // FIXME: .field("ut_host", &self.ut_host)
                        .field("ut_exit", &self.ut_exit)
                        .field("ut_session", &self.ut_session)
                        .field("ut_tv", &self.ut_tv)
                        .field("ut_addr_v6", &self.ut_addr_v6)
                        .field("__glibc_reserved", &self.__glibc_reserved)
                        .finish()
                }
            }

            impl ::hash::Hash for utmpx {
                fn hash<H: ::hash::Hasher>(&self, state: &mut H) {
                    self.ut_type.hash(state);
                    self.ut_pid.hash(state);
                    self.ut_line.hash(state);
                    self.ut_id.hash(state);
                    self.ut_user.hash(state);
                    self.ut_host.hash(state);
                    self.ut_exit.hash(state);
                    self.ut_session.hash(state);
                    self.ut_tv.hash(state);
                    self.ut_addr_v6.hash(state);
                    self.__glibc_reserved.hash(state);
                }
            }
        }
    }

    pub const RLIMIT_CPU: ::__rlimit_resource_t = 0;
    pub const RLIMIT_FSIZE: ::__rlimit_resource_t = 1;
    pub const RLIMIT_DATA: ::__rlimit_resource_t = 2;
    pub const RLIMIT_STACK: ::__rlimit_resource_t = 3;
    pub const RLIMIT_CORE: ::__rlimit_resource_t = 4;
    pub const RLIMIT_LOCKS: ::__rlimit_resource_t = 10;
    pub const RLIMIT_SIGPENDING: ::__rlimit_resource_t = 11;
    pub const RLIMIT_MSGQUEUE: ::__rlimit_resource_t = 12;
    pub const RLIMIT_NICE: ::__rlimit_resource_t = 13;
    pub const RLIMIT_RTPRIO: ::__rlimit_resource_t = 14;
    pub const RLIMIT_RTTIME: ::__rlimit_resource_t = 15;
    pub const RLIMIT_NLIMITS: ::__rlimit_resource_t = 16;

    pub const MS_RMT_MASK: ::c_ulong = 0x02800051;

    pub const __UT_LINESIZE: usize = 32;
    pub const __UT_NAMESIZE: usize = 32;
    pub const __UT_HOSTSIZE: usize = 256;
    pub const EMPTY: ::c_short = 0;
    pub const RUN_LVL: ::c_short = 1;
    pub const BOOT_TIME: ::c_short = 2;
    pub const NEW_TIME: ::c_short = 3;
    pub const OLD_TIME: ::c_short = 4;
    pub const INIT_PROCESS: ::c_short = 5;
    pub const LOGIN_PROCESS: ::c_short = 6;
    pub const USER_PROCESS: ::c_short = 7;
    pub const DEAD_PROCESS: ::c_short = 8;
    pub const ACCOUNTING: ::c_short = 9;

    pub const SOCK_NONBLOCK: ::c_int = O_NONBLOCK;

    pub const SOL_RXRPC: ::c_int = 272;
    pub const SOL_PPPOL2TP: ::c_int = 273;
    pub const SOL_PNPIPE: ::c_int = 275;
    pub const SOL_RDS: ::c_int = 276;
    pub const SOL_IUCV: ::c_int = 277;
    pub const SOL_CAIF: ::c_int = 278;
    pub const SOL_NFC: ::c_int = 280;
    pub const SOL_XDP: ::c_int = 283;

    pub const MSG_TRYHARD: ::c_int = 4;

    pub const LC_PAPER: ::c_int = 7;
    pub const LC_NAME: ::c_int = 8;
    pub const LC_ADDRESS: ::c_int = 9;
    pub const LC_TELEPHONE: ::c_int = 10;
    pub const LC_MEASUREMENT: ::c_int = 11;
    pub const LC_IDENTIFICATION: ::c_int = 12;
    pub const LC_PAPER_MASK: ::c_int = (1 << LC_PAPER);
    pub const LC_NAME_MASK: ::c_int = (1 << LC_NAME);
    pub const LC_ADDRESS_MASK: ::c_int = (1 << LC_ADDRESS);
    pub const LC_TELEPHONE_MASK: ::c_int = (1 << LC_TELEPHONE);
    pub const LC_MEASUREMENT_MASK: ::c_int = (1 << LC_MEASUREMENT);
    pub const LC_IDENTIFICATION_MASK: ::c_int = (1 << LC_IDENTIFICATION);
    pub const LC_ALL_MASK: ::c_int = ::LC_CTYPE_MASK
        | ::LC_NUMERIC_MASK
        | ::LC_TIME_MASK
        | ::LC_COLLATE_MASK
        | ::LC_MONETARY_MASK
        | ::LC_MESSAGES_MASK
        | LC_PAPER_MASK
        | LC_NAME_MASK
        | LC_ADDRESS_MASK
        | LC_TELEPHONE_MASK
        | LC_MEASUREMENT_MASK
        | LC_IDENTIFICATION_MASK;

    pub const MAP_SHARED_VALIDATE: ::c_int = 0x3;
    pub const MAP_FIXED_NOREPLACE: ::c_int = 0x100000;

    pub const ENOTSUP: ::c_int = EOPNOTSUPP;

    pub const SOCK_SEQPACKET: ::c_int = 5;
    pub const SOCK_DCCP: ::c_int = 6;
    pub const SOCK_PACKET: ::c_int = 10;

    pub const TCP_COOKIE_TRANSACTIONS: ::c_int = 15;
    pub const TCP_THIN_LINEAR_TIMEOUTS: ::c_int = 16;
    pub const TCP_THIN_DUPACK: ::c_int = 17;
    pub const TCP_USER_TIMEOUT: ::c_int = 18;
    pub const TCP_REPAIR: ::c_int = 19;
    pub const TCP_REPAIR_QUEUE: ::c_int = 20;
    pub const TCP_QUEUE_SEQ: ::c_int = 21;
    pub const TCP_REPAIR_OPTIONS: ::c_int = 22;
    pub const TCP_FASTOPEN: ::c_int = 23;
    pub const TCP_TIMESTAMP: ::c_int = 24;

    /* DCCP socket options */
    pub const DCCP_SOCKOPT_PACKET_SIZE: ::c_int = 1;
    pub const DCCP_SOCKOPT_SERVICE: ::c_int = 2;
    pub const DCCP_SOCKOPT_CHANGE_L: ::c_int = 3;
    pub const DCCP_SOCKOPT_CHANGE_R: ::c_int = 4;
    pub const DCCP_SOCKOPT_GET_CUR_MPS: ::c_int = 5;
    pub const DCCP_SOCKOPT_SERVER_TIMEWAIT: ::c_int = 6;
    pub const DCCP_SOCKOPT_SEND_CSCOV: ::c_int = 10;
    pub const DCCP_SOCKOPT_RECV_CSCOV: ::c_int = 11;
    pub const DCCP_SOCKOPT_AVAILABLE_CCIDS: ::c_int = 12;
    pub const DCCP_SOCKOPT_CCID: ::c_int = 13;
    pub const DCCP_SOCKOPT_TX_CCID: ::c_int = 14;
    pub const DCCP_SOCKOPT_RX_CCID: ::c_int = 15;
    pub const DCCP_SOCKOPT_QPOLICY_ID: ::c_int = 16;
    pub const DCCP_SOCKOPT_QPOLICY_TXQLEN: ::c_int = 17;
    pub const DCCP_SOCKOPT_CCID_RX_INFO: ::c_int = 128;
    pub const DCCP_SOCKOPT_CCID_TX_INFO: ::c_int = 192;

    /// maximum number of services provided on the same listening port
    pub const DCCP_SERVICE_LIST_MAX_LEN: ::c_int = 32;

    pub const SIGEV_THREAD_ID: ::c_int = 4;

    pub const BUFSIZ: ::c_uint = 8192;
    pub const TMP_MAX: ::c_uint = 238328;
    pub const FOPEN_MAX: ::c_uint = 16;
    pub const POSIX_MADV_DONTNEED: ::c_int = 4;
    pub const _SC_EQUIV_CLASS_MAX: ::c_int = 41;
    pub const _SC_CHARCLASS_NAME_MAX: ::c_int = 45;
    pub const _SC_PII: ::c_int = 53;
    pub const _SC_PII_XTI: ::c_int = 54;
    pub const _SC_PII_SOCKET: ::c_int = 55;
    pub const _SC_PII_INTERNET: ::c_int = 56;
    pub const _SC_PII_OSI: ::c_int = 57;
    pub const _SC_POLL: ::c_int = 58;
    pub const _SC_SELECT: ::c_int = 59;
    pub const _SC_PII_INTERNET_STREAM: ::c_int = 61;
    pub const _SC_PII_INTERNET_DGRAM: ::c_int = 62;
    pub const _SC_PII_OSI_COTS: ::c_int = 63;
    pub const _SC_PII_OSI_CLTS: ::c_int = 64;
    pub const _SC_PII_OSI_M: ::c_int = 65;
    pub const _SC_T_IOV_MAX: ::c_int = 66;
    pub const _SC_2_C_VERSION: ::c_int = 96;
    pub const _SC_CHAR_BIT: ::c_int = 101;
    pub const _SC_CHAR_MAX: ::c_int = 102;
    pub const _SC_CHAR_MIN: ::c_int = 103;
    pub const _SC_INT_MAX: ::c_int = 104;
    pub const _SC_INT_MIN: ::c_int = 105;
    pub const _SC_LONG_BIT: ::c_int = 106;
    pub const _SC_WORD_BIT: ::c_int = 107;
    pub const _SC_MB_LEN_MAX: ::c_int = 108;
    pub const _SC_SSIZE_MAX: ::c_int = 110;
    pub const _SC_SCHAR_MAX: ::c_int = 111;
    pub const _SC_SCHAR_MIN: ::c_int = 112;
    pub const _SC_SHRT_MAX: ::c_int = 113;
    pub const _SC_SHRT_MIN: ::c_int = 114;
    pub const _SC_UCHAR_MAX: ::c_int = 115;
    pub const _SC_UINT_MAX: ::c_int = 116;
    pub const _SC_ULONG_MAX: ::c_int = 117;
    pub const _SC_USHRT_MAX: ::c_int = 118;
    pub const _SC_NL_ARGMAX: ::c_int = 119;
    pub const _SC_NL_LANGMAX: ::c_int = 120;
    pub const _SC_NL_MSGMAX: ::c_int = 121;
    pub const _SC_NL_NMAX: ::c_int = 122;
    pub const _SC_NL_SETMAX: ::c_int = 123;
    pub const _SC_NL_TEXTMAX: ::c_int = 124;
    pub const _SC_BASE: ::c_int = 134;
    pub const _SC_C_LANG_SUPPORT: ::c_int = 135;
    pub const _SC_C_LANG_SUPPORT_R: ::c_int = 136;
    pub const _SC_DEVICE_IO: ::c_int = 140;
    pub const _SC_DEVICE_SPECIFIC: ::c_int = 141;
    pub const _SC_DEVICE_SPECIFIC_R: ::c_int = 142;
    pub const _SC_FD_MGMT: ::c_int = 143;
    pub const _SC_FIFO: ::c_int = 144;
    pub const _SC_PIPE: ::c_int = 145;
    pub const _SC_FILE_ATTRIBUTES: ::c_int = 146;
    pub const _SC_FILE_LOCKING: ::c_int = 147;
    pub const _SC_FILE_SYSTEM: ::c_int = 148;
    pub const _SC_MULTI_PROCESS: ::c_int = 150;
    pub const _SC_SINGLE_PROCESS: ::c_int = 151;
    pub const _SC_NETWORKING: ::c_int = 152;
    pub const _SC_REGEX_VERSION: ::c_int = 156;
    pub const _SC_SIGNALS: ::c_int = 158;
    pub const _SC_SYSTEM_DATABASE: ::c_int = 162;
    pub const _SC_SYSTEM_DATABASE_R: ::c_int = 163;
    pub const _SC_USER_GROUPS: ::c_int = 166;
    pub const _SC_USER_GROUPS_R: ::c_int = 167;
    pub const _SC_LEVEL1_ICACHE_SIZE: ::c_int = 185;
    pub const _SC_LEVEL1_ICACHE_ASSOC: ::c_int = 186;
    pub const _SC_LEVEL1_ICACHE_LINESIZE: ::c_int = 187;
    pub const _SC_LEVEL1_DCACHE_SIZE: ::c_int = 188;
    pub const _SC_LEVEL1_DCACHE_ASSOC: ::c_int = 189;
    pub const _SC_LEVEL1_DCACHE_LINESIZE: ::c_int = 190;
    pub const _SC_LEVEL2_CACHE_SIZE: ::c_int = 191;
    pub const _SC_LEVEL2_CACHE_ASSOC: ::c_int = 192;
    pub const _SC_LEVEL2_CACHE_LINESIZE: ::c_int = 193;
    pub const _SC_LEVEL3_CACHE_SIZE: ::c_int = 194;
    pub const _SC_LEVEL3_CACHE_ASSOC: ::c_int = 195;
    pub const _SC_LEVEL3_CACHE_LINESIZE: ::c_int = 196;
    pub const _SC_LEVEL4_CACHE_SIZE: ::c_int = 197;
    pub const _SC_LEVEL4_CACHE_ASSOC: ::c_int = 198;
    pub const _SC_LEVEL4_CACHE_LINESIZE: ::c_int = 199;
    pub const O_ACCMODE: ::c_int = 3;
    pub const ST_RELATIME: ::c_ulong = 4096;
    pub const NI_MAXHOST: ::socklen_t = 1025;

    pub const ADFS_SUPER_MAGIC: ::c_long = 0x0000adf5;
    pub const AFFS_SUPER_MAGIC: ::c_long = 0x0000adff;
    pub const CODA_SUPER_MAGIC: ::c_long = 0x73757245;
    pub const CRAMFS_MAGIC: ::c_long = 0x28cd3d45;
    pub const EFS_SUPER_MAGIC: ::c_long = 0x00414a53;
    pub const EXT2_SUPER_MAGIC: ::c_long = 0x0000ef53;
    pub const EXT3_SUPER_MAGIC: ::c_long = 0x0000ef53;
    pub const EXT4_SUPER_MAGIC: ::c_long = 0x0000ef53;
    pub const HPFS_SUPER_MAGIC: ::c_long = 0xf995e849;
    pub const HUGETLBFS_MAGIC: ::c_long = 0x958458f6;
    pub const ISOFS_SUPER_MAGIC: ::c_long = 0x00009660;
    pub const JFFS2_SUPER_MAGIC: ::c_long = 0x000072b6;
    pub const MINIX_SUPER_MAGIC: ::c_long = 0x0000137f;
    pub const MINIX_SUPER_MAGIC2: ::c_long = 0x0000138f;
    pub const MINIX2_SUPER_MAGIC: ::c_long = 0x00002468;
    pub const MINIX2_SUPER_MAGIC2: ::c_long = 0x00002478;
    pub const MSDOS_SUPER_MAGIC: ::c_long = 0x00004d44;
    pub const NCP_SUPER_MAGIC: ::c_long = 0x0000564c;
    pub const NFS_SUPER_MAGIC: ::c_long = 0x00006969;
    pub const OPENPROM_SUPER_MAGIC: ::c_long = 0x00009fa1;
    pub const PROC_SUPER_MAGIC: ::c_long = 0x00009fa0;
    pub const QNX4_SUPER_MAGIC: ::c_long = 0x0000002f;
    pub const REISERFS_SUPER_MAGIC: ::c_long = 0x52654973;
    pub const SMB_SUPER_MAGIC: ::c_long = 0x0000517b;
    pub const TMPFS_MAGIC: ::c_long = 0x01021994;
    pub const USBDEVICE_SUPER_MAGIC: ::c_long = 0x00009fa2;

    pub const CPU_SETSIZE: ::c_int = 0x400;

    pub const PTRACE_TRACEME: ::c_uint = 0;
    pub const PTRACE_PEEKTEXT: ::c_uint = 1;
    pub const PTRACE_PEEKDATA: ::c_uint = 2;
    pub const PTRACE_PEEKUSER: ::c_uint = 3;
    pub const PTRACE_POKETEXT: ::c_uint = 4;
    pub const PTRACE_POKEDATA: ::c_uint = 5;
    pub const PTRACE_POKEUSER: ::c_uint = 6;
    pub const PTRACE_CONT: ::c_uint = 7;
    pub const PTRACE_KILL: ::c_uint = 8;
    pub const PTRACE_SINGLESTEP: ::c_uint = 9;
    pub const PTRACE_ATTACH: ::c_uint = 16;
    pub const PTRACE_SYSCALL: ::c_uint = 24;
    pub const PTRACE_SETOPTIONS: ::c_uint = 0x4200;
    pub const PTRACE_GETEVENTMSG: ::c_uint = 0x4201;
    pub const PTRACE_GETSIGINFO: ::c_uint = 0x4202;
    pub const PTRACE_SETSIGINFO: ::c_uint = 0x4203;
    pub const PTRACE_GETREGSET: ::c_uint = 0x4204;
    pub const PTRACE_SETREGSET: ::c_uint = 0x4205;
    pub const PTRACE_SEIZE: ::c_uint = 0x4206;
    pub const PTRACE_INTERRUPT: ::c_uint = 0x4207;
    pub const PTRACE_LISTEN: ::c_uint = 0x4208;
    pub const PTRACE_PEEKSIGINFO: ::c_uint = 0x4209;

    pub const EPOLLWAKEUP: ::c_int = 0x20000000;

    pub const SEEK_DATA: ::c_int = 3;
    pub const SEEK_HOLE: ::c_int = 4;

    pub const LINUX_REBOOT_MAGIC1: ::c_int = 0xfee1dead;
    pub const LINUX_REBOOT_MAGIC2: ::c_int = 672274793;
    pub const LINUX_REBOOT_MAGIC2A: ::c_int = 85072278;
    pub const LINUX_REBOOT_MAGIC2B: ::c_int = 369367448;
    pub const LINUX_REBOOT_MAGIC2C: ::c_int = 537993216;

    pub const LINUX_REBOOT_CMD_RESTART: ::c_int = 0x01234567;
    pub const LINUX_REBOOT_CMD_HALT: ::c_int = 0xCDEF0123;
    pub const LINUX_REBOOT_CMD_CAD_ON: ::c_int = 0x89ABCDEF;
    pub const LINUX_REBOOT_CMD_CAD_OFF: ::c_int = 0x00000000;
    pub const LINUX_REBOOT_CMD_POWER_OFF: ::c_int = 0x4321FEDC;
    pub const LINUX_REBOOT_CMD_RESTART2: ::c_int = 0xA1B2C3D4;
    pub const LINUX_REBOOT_CMD_SW_SUSPEND: ::c_int = 0xD000FCE2;
    pub const LINUX_REBOOT_CMD_KEXEC: ::c_int = 0x45584543;

    // linux/rtnetlink.h
    pub const TCA_PAD: ::c_ushort = 9;
    pub const TCA_DUMP_INVISIBLE: ::c_ushort = 10;
    pub const TCA_CHAIN: ::c_ushort = 11;
    pub const TCA_HW_OFFLOAD: ::c_ushort = 12;

    pub const RTM_DELNETCONF: u16 = 81;
    pub const RTM_NEWSTATS: u16 = 92;
    pub const RTM_GETSTATS: u16 = 94;
    pub const RTM_NEWCACHEREPORT: u16 = 96;

    pub const RTM_F_LOOKUP_TABLE: ::c_uint = 0x1000;
    pub const RTM_F_FIB_MATCH: ::c_uint = 0x2000;

    pub const RTA_VIA: ::c_ushort = 18;
    pub const RTA_NEWDST: ::c_ushort = 19;
    pub const RTA_PREF: ::c_ushort = 20;
    pub const RTA_ENCAP_TYPE: ::c_ushort = 21;
    pub const RTA_ENCAP: ::c_ushort = 22;
    pub const RTA_EXPIRES: ::c_ushort = 23;
    pub const RTA_PAD: ::c_ushort = 24;
    pub const RTA_UID: ::c_ushort = 25;
    pub const RTA_TTL_PROPAGATE: ::c_ushort = 26;

    // linux/neighbor.h
    pub const NTF_EXT_LEARNED: u8 = 0x10;
    pub const NTF_OFFLOADED: u8 = 0x20;

    pub const NDA_MASTER: ::c_ushort = 9;
    pub const NDA_LINK_NETNSID: ::c_ushort = 10;
    pub const NDA_SRC_VNI: ::c_ushort = 11;

    // linux/if_addr.h
    pub const IFA_FLAGS: ::c_ushort = 8;

    pub const IFA_F_MANAGETEMPADDR: u32 = 0x100;
    pub const IFA_F_NOPREFIXROUTE: u32 = 0x200;
    pub const IFA_F_MCAUTOJOIN: u32 = 0x400;
    pub const IFA_F_STABLE_PRIVACY: u32 = 0x800;

    pub const MAX_LINKS: ::c_int = 32;

    pub const GENL_UNS_ADMIN_PERM: ::c_int = 0x10;

    pub const GENL_ID_VFS_DQUOT: ::c_int = ::NLMSG_MIN_TYPE + 1;
    pub const GENL_ID_PMCRAID: ::c_int = ::NLMSG_MIN_TYPE + 2;

    pub const TIOCM_LE: ::c_int = 0x001;
    pub const TIOCM_DTR: ::c_int = 0x002;
    pub const TIOCM_RTS: ::c_int = 0x004;
    pub const TIOCM_CD: ::c_int = TIOCM_CAR;
    pub const TIOCM_RI: ::c_int = TIOCM_RNG;

    pub const NF_NETDEV_INGRESS: ::c_int = 0;
    pub const NF_NETDEV_NUMHOOKS: ::c_int = 1;

    pub const NFPROTO_INET: ::c_int = 1;
    pub const NFPROTO_NETDEV: ::c_int = 5;

    // linux/netfilter/nf_tables.h
    pub const NFT_TABLE_MAXNAMELEN: ::c_int = 256;
    pub const NFT_CHAIN_MAXNAMELEN: ::c_int = 256;
    pub const NFT_SET_MAXNAMELEN: ::c_int = 256;
    pub const NFT_OBJ_MAXNAMELEN: ::c_int = 256;
    pub const NFT_USERDATA_MAXLEN: ::c_int = 256;

    pub const NFT_REG_VERDICT: ::c_int = 0;
    pub const NFT_REG_1: ::c_int = 1;
    pub const NFT_REG_2: ::c_int = 2;
    pub const NFT_REG_3: ::c_int = 3;
    pub const NFT_REG_4: ::c_int = 4;
    pub const __NFT_REG_MAX: ::c_int = 5;
    pub const NFT_REG32_00: ::c_int = 8;
    pub const NFT_REG32_01: ::c_int = 9;
    pub const NFT_REG32_02: ::c_int = 10;
    pub const NFT_REG32_03: ::c_int = 11;
    pub const NFT_REG32_04: ::c_int = 12;
    pub const NFT_REG32_05: ::c_int = 13;
    pub const NFT_REG32_06: ::c_int = 14;
    pub const NFT_REG32_07: ::c_int = 15;
    pub const NFT_REG32_08: ::c_int = 16;
    pub const NFT_REG32_09: ::c_int = 17;
    pub const NFT_REG32_10: ::c_int = 18;
    pub const NFT_REG32_11: ::c_int = 19;
    pub const NFT_REG32_12: ::c_int = 20;
    pub const NFT_REG32_13: ::c_int = 21;
    pub const NFT_REG32_14: ::c_int = 22;
    pub const NFT_REG32_15: ::c_int = 23;

    pub const NFT_REG_SIZE: ::c_int = 16;
    pub const NFT_REG32_SIZE: ::c_int = 4;

    pub const NFT_CONTINUE: ::c_int = -1;
    pub const NFT_BREAK: ::c_int = -2;
    pub const NFT_JUMP: ::c_int = -3;
    pub const NFT_GOTO: ::c_int = -4;
    pub const NFT_RETURN: ::c_int = -5;

    pub const NFT_MSG_NEWTABLE: ::c_int = 0;
    pub const NFT_MSG_GETTABLE: ::c_int = 1;
    pub const NFT_MSG_DELTABLE: ::c_int = 2;
    pub const NFT_MSG_NEWCHAIN: ::c_int = 3;
    pub const NFT_MSG_GETCHAIN: ::c_int = 4;
    pub const NFT_MSG_DELCHAIN: ::c_int = 5;
    pub const NFT_MSG_NEWRULE: ::c_int = 6;
    pub const NFT_MSG_GETRULE: ::c_int = 7;
    pub const NFT_MSG_DELRULE: ::c_int = 8;
    pub const NFT_MSG_NEWSET: ::c_int = 9;
    pub const NFT_MSG_GETSET: ::c_int = 10;
    pub const NFT_MSG_DELSET: ::c_int = 11;
    pub const NFT_MSG_NEWSETELEM: ::c_int = 12;
    pub const NFT_MSG_GETSETELEM: ::c_int = 13;
    pub const NFT_MSG_DELSETELEM: ::c_int = 14;
    pub const NFT_MSG_NEWGEN: ::c_int = 15;
    pub const NFT_MSG_GETGEN: ::c_int = 16;
    pub const NFT_MSG_TRACE: ::c_int = 17;
    cfg_if! {
        if #[cfg(not(target_arch = "sparc64"))] {
            pub const NFT_MSG_NEWOBJ: ::c_int = 18;
            pub const NFT_MSG_GETOBJ: ::c_int = 19;
            pub const NFT_MSG_DELOBJ: ::c_int = 20;
            pub const NFT_MSG_GETOBJ_RESET: ::c_int = 21;
        }
    }
    pub const NFT_MSG_MAX: ::c_int = 25;

    pub const NFT_SET_ANONYMOUS: ::c_int = 0x1;
    pub const NFT_SET_CONSTANT: ::c_int = 0x2;
    pub const NFT_SET_INTERVAL: ::c_int = 0x4;
    pub const NFT_SET_MAP: ::c_int = 0x8;
    pub const NFT_SET_TIMEOUT: ::c_int = 0x10;
    pub const NFT_SET_EVAL: ::c_int = 0x20;

    pub const NFT_SET_POL_PERFORMANCE: ::c_int = 0;
    pub const NFT_SET_POL_MEMORY: ::c_int = 1;

    pub const NFT_SET_ELEM_INTERVAL_END: ::c_int = 0x1;

    pub const NFT_DATA_VALUE: ::c_uint = 0;
    pub const NFT_DATA_VERDICT: ::c_uint = 0xffffff00;

    pub const NFT_DATA_RESERVED_MASK: ::c_uint = 0xffffff00;

    pub const NFT_DATA_VALUE_MAXLEN: ::c_int = 64;

    pub const NFT_BYTEORDER_NTOH: ::c_int = 0;
    pub const NFT_BYTEORDER_HTON: ::c_int = 1;

    pub const NFT_CMP_EQ: ::c_int = 0;
    pub const NFT_CMP_NEQ: ::c_int = 1;
    pub const NFT_CMP_LT: ::c_int = 2;
    pub const NFT_CMP_LTE: ::c_int = 3;
    pub const NFT_CMP_GT: ::c_int = 4;
    pub const NFT_CMP_GTE: ::c_int = 5;

    pub const NFT_RANGE_EQ: ::c_int = 0;
    pub const NFT_RANGE_NEQ: ::c_int = 1;

    pub const NFT_LOOKUP_F_INV: ::c_int = (1 << 0);

    pub const NFT_DYNSET_OP_ADD: ::c_int = 0;
    pub const NFT_DYNSET_OP_UPDATE: ::c_int = 1;

    pub const NFT_DYNSET_F_INV: ::c_int = (1 << 0);

    pub const NFT_PAYLOAD_LL_HEADER: ::c_int = 0;
    pub const NFT_PAYLOAD_NETWORK_HEADER: ::c_int = 1;
    pub const NFT_PAYLOAD_TRANSPORT_HEADER: ::c_int = 2;

    pub const NFT_PAYLOAD_CSUM_NONE: ::c_int = 0;
    pub const NFT_PAYLOAD_CSUM_INET: ::c_int = 1;

    pub const NFT_META_LEN: ::c_int = 0;
    pub const NFT_META_PROTOCOL: ::c_int = 1;
    pub const NFT_META_PRIORITY: ::c_int = 2;
    pub const NFT_META_MARK: ::c_int = 3;
    pub const NFT_META_IIF: ::c_int = 4;
    pub const NFT_META_OIF: ::c_int = 5;
    pub const NFT_META_IIFNAME: ::c_int = 6;
    pub const NFT_META_OIFNAME: ::c_int = 7;
    pub const NFT_META_IIFTYPE: ::c_int = 8;
    pub const NFT_META_OIFTYPE: ::c_int = 9;
    pub const NFT_META_SKUID: ::c_int = 10;
    pub const NFT_META_SKGID: ::c_int = 11;
    pub const NFT_META_NFTRACE: ::c_int = 12;
    pub const NFT_META_RTCLASSID: ::c_int = 13;
    pub const NFT_META_SECMARK: ::c_int = 14;
    pub const NFT_META_NFPROTO: ::c_int = 15;
    pub const NFT_META_L4PROTO: ::c_int = 16;
    pub const NFT_META_BRI_IIFNAME: ::c_int = 17;
    pub const NFT_META_BRI_OIFNAME: ::c_int = 18;
    pub const NFT_META_PKTTYPE: ::c_int = 19;
    pub const NFT_META_CPU: ::c_int = 20;
    pub const NFT_META_IIFGROUP: ::c_int = 21;
    pub const NFT_META_OIFGROUP: ::c_int = 22;
    pub const NFT_META_CGROUP: ::c_int = 23;
    pub const NFT_META_PRANDOM: ::c_int = 24;

    pub const NFT_CT_STATE: ::c_int = 0;
    pub const NFT_CT_DIRECTION: ::c_int = 1;
    pub const NFT_CT_STATUS: ::c_int = 2;
    pub const NFT_CT_MARK: ::c_int = 3;
    pub const NFT_CT_SECMARK: ::c_int = 4;
    pub const NFT_CT_EXPIRATION: ::c_int = 5;
    pub const NFT_CT_HELPER: ::c_int = 6;
    pub const NFT_CT_L3PROTOCOL: ::c_int = 7;
    pub const NFT_CT_SRC: ::c_int = 8;
    pub const NFT_CT_DST: ::c_int = 9;
    pub const NFT_CT_PROTOCOL: ::c_int = 10;
    pub const NFT_CT_PROTO_SRC: ::c_int = 11;
    pub const NFT_CT_PROTO_DST: ::c_int = 12;
    pub const NFT_CT_LABELS: ::c_int = 13;
    pub const NFT_CT_PKTS: ::c_int = 14;
    pub const NFT_CT_BYTES: ::c_int = 15;

    pub const NFT_LIMIT_PKTS: ::c_int = 0;
    pub const NFT_LIMIT_PKT_BYTES: ::c_int = 1;

    pub const NFT_LIMIT_F_INV: ::c_int = (1 << 0);

    pub const NFT_QUEUE_FLAG_BYPASS: ::c_int = 0x01;
    pub const NFT_QUEUE_FLAG_CPU_FANOUT: ::c_int = 0x02;
    pub const NFT_QUEUE_FLAG_MASK: ::c_int = 0x03;

    pub const NFT_QUOTA_F_INV: ::c_int = (1 << 0);

    pub const NFT_REJECT_ICMP_UNREACH: ::c_int = 0;
    pub const NFT_REJECT_TCP_RST: ::c_int = 1;
    pub const NFT_REJECT_ICMPX_UNREACH: ::c_int = 2;

    pub const NFT_REJECT_ICMPX_NO_ROUTE: ::c_int = 0;
    pub const NFT_REJECT_ICMPX_PORT_UNREACH: ::c_int = 1;
    pub const NFT_REJECT_ICMPX_HOST_UNREACH: ::c_int = 2;
    pub const NFT_REJECT_ICMPX_ADMIN_PROHIBITED: ::c_int = 3;

    pub const NFT_NAT_SNAT: ::c_int = 0;
    pub const NFT_NAT_DNAT: ::c_int = 1;

    pub const NFT_TRACETYPE_UNSPEC: ::c_int = 0;
    pub const NFT_TRACETYPE_POLICY: ::c_int = 1;
    pub const NFT_TRACETYPE_RETURN: ::c_int = 2;
    pub const NFT_TRACETYPE_RULE: ::c_int = 3;

    pub const NFT_NG_INCREMENTAL: ::c_int = 0;
    pub const NFT_NG_RANDOM: ::c_int = 1;

    pub const M_MXFAST: ::c_int = 1;
    pub const M_NLBLKS: ::c_int = 2;
    pub const M_GRAIN: ::c_int = 3;
    pub const M_KEEP: ::c_int = 4;
    pub const M_TRIM_THRESHOLD: ::c_int = -1;
    pub const M_TOP_PAD: ::c_int = -2;
    pub const M_MMAP_THRESHOLD: ::c_int = -3;
    pub const M_MMAP_MAX: ::c_int = -4;
    pub const M_CHECK_ACTION: ::c_int = -5;
    pub const M_PERTURB: ::c_int = -6;
    pub const M_ARENA_TEST: ::c_int = -7;
    pub const M_ARENA_MAX: ::c_int = -8;

    pub const AT_STATX_SYNC_TYPE: ::c_int = 0x6000;
    pub const AT_STATX_SYNC_AS_STAT: ::c_int = 0x0000;
    pub const AT_STATX_FORCE_SYNC: ::c_int = 0x2000;
    pub const AT_STATX_DONT_SYNC: ::c_int = 0x4000;
    pub const STATX_TYPE: ::c_uint = 0x0001;
    pub const STATX_MODE: ::c_uint = 0x0002;
    pub const STATX_NLINK: ::c_uint = 0x0004;
    pub const STATX_UID: ::c_uint = 0x0008;
    pub const STATX_GID: ::c_uint = 0x0010;
    pub const STATX_ATIME: ::c_uint = 0x0020;
    pub const STATX_MTIME: ::c_uint = 0x0040;
    pub const STATX_CTIME: ::c_uint = 0x0080;
    pub const STATX_INO: ::c_uint = 0x0100;
    pub const STATX_SIZE: ::c_uint = 0x0200;
    pub const STATX_BLOCKS: ::c_uint = 0x0400;
    pub const STATX_BASIC_STATS: ::c_uint = 0x07ff;
    pub const STATX_BTIME: ::c_uint = 0x0800;
    pub const STATX_ALL: ::c_uint = 0x0fff;
    pub const STATX__RESERVED: ::c_int = 0x80000000;
    pub const STATX_ATTR_COMPRESSED: ::c_int = 0x0004;
    pub const STATX_ATTR_IMMUTABLE: ::c_int = 0x0010;
    pub const STATX_ATTR_APPEND: ::c_int = 0x0020;
    pub const STATX_ATTR_NODUMP: ::c_int = 0x0040;
    pub const STATX_ATTR_ENCRYPTED: ::c_int = 0x0800;
    pub const STATX_ATTR_AUTOMOUNT: ::c_int = 0x1000;

    cfg_if! {
        if #[cfg(any(
            target_arch = "arm",
            target_arch = "x86",
            target_arch = "x86_64",
            target_arch = "s390x"
        ))] {
            pub const PTHREAD_STACK_MIN: ::size_t = 16384;
        } else if #[cfg(target_arch = "sparc64")] {
            pub const PTHREAD_STACK_MIN: ::size_t = 0x6000;
        } else {
            pub const PTHREAD_STACK_MIN: ::size_t = 131072;
        }
    }
    pub const PTHREAD_MUTEX_ADAPTIVE_NP: ::c_int = 3;

    extern "C" {
        pub fn sendmmsg(
            sockfd: ::c_int,
            msgvec: *mut ::mmsghdr,
            vlen: ::c_uint,
            flags: ::c_int,
        ) -> ::c_int;
        pub fn recvmmsg(
            sockfd: ::c_int,
            msgvec: *mut ::mmsghdr,
            vlen: ::c_uint,
            flags: ::c_int,
            timeout: *mut ::timespec,
        ) -> ::c_int;

        pub fn getrlimit64(
            resource: ::__rlimit_resource_t,
            rlim: *mut ::rlimit64,
        ) -> ::c_int;
        pub fn setrlimit64(
            resource: ::__rlimit_resource_t,
            rlim: *const ::rlimit64,
        ) -> ::c_int;
        pub fn getrlimit(
            resource: ::__rlimit_resource_t,
            rlim: *mut ::rlimit,
        ) -> ::c_int;
        pub fn setrlimit(
            resource: ::__rlimit_resource_t,
            rlim: *const ::rlimit,
        ) -> ::c_int;
        pub fn prlimit(
            pid: ::pid_t,
            resource: ::__rlimit_resource_t,
            new_limit: *const ::rlimit,
            old_limit: *mut ::rlimit,
        ) -> ::c_int;
        pub fn prlimit64(
            pid: ::pid_t,
            resource: ::__rlimit_resource_t,
            new_limit: *const ::rlimit64,
            old_limit: *mut ::rlimit64,
        ) -> ::c_int;
        pub fn utmpname(file: *const ::c_char) -> ::c_int;
        pub fn utmpxname(file: *const ::c_char) -> ::c_int;
        pub fn getutxent() -> *mut utmpx;
        pub fn getutxid(ut: *const utmpx) -> *mut utmpx;
        pub fn getutxline(ut: *const utmpx) -> *mut utmpx;
        pub fn pututxline(ut: *const utmpx) -> *mut utmpx;
        pub fn setutxent();
        pub fn endutxent();
        pub fn getpt() -> ::c_int;
        pub fn mallopt(param: ::c_int, value: ::c_int) -> ::c_int;
        pub fn gettimeofday(tp: *mut ::timeval, tz: *mut ::timezone) -> ::c_int;
        pub fn statx(
            dirfd: ::c_int,
            pathname: *const c_char,
            flags: ::c_int,
            mask: ::c_uint,
            statxbuf: *mut statx,
        ) -> ::c_int;
        pub fn getrandom(
            buf: *mut ::c_void,
            buflen: ::size_t,
            flags: ::c_uint,
        ) -> ::ssize_t;
    }

    #[link(name = "util")]
    extern "C" {
        pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
        pub fn backtrace(buf: *mut *mut ::c_void, sz: ::c_int) -> ::c_int;
        pub fn glob64(
            pattern: *const ::c_char,
            flags: ::c_int,
            errfunc: ::Option<
                extern "C" fn(epath: *const ::c_char, errno: ::c_int) -> ::c_int,
            >,
            pglob: *mut glob64_t,
        ) -> ::c_int;
        pub fn globfree64(pglob: *mut glob64_t);
        pub fn ptrace(request: ::c_uint, ...) -> ::c_long;
        pub fn pthread_attr_getaffinity_np(
            attr: *const ::pthread_attr_t,
            cpusetsize: ::size_t,
            cpuset: *mut ::cpu_set_t,
        ) -> ::c_int;
        pub fn pthread_attr_setaffinity_np(
            attr: *mut ::pthread_attr_t,
            cpusetsize: ::size_t,
            cpuset: *const ::cpu_set_t,
        ) -> ::c_int;
        pub fn getpriority(which: ::__priority_which_t, who: ::id_t) -> ::c_int;
        pub fn setpriority(
            which: ::__priority_which_t,
            who: ::id_t,
            prio: ::c_int,
        ) -> ::c_int;
        pub fn pthread_getaffinity_np(
            thread: ::pthread_t,
            cpusetsize: ::size_t,
            cpuset: *mut ::cpu_set_t,
        ) -> ::c_int;
        pub fn pthread_setaffinity_np(
            thread: ::pthread_t,
            cpusetsize: ::size_t,
            cpuset: *const ::cpu_set_t,
        ) -> ::c_int;
        pub fn pthread_rwlockattr_getkind_np(
            attr: *const ::pthread_rwlockattr_t,
            val: *mut ::c_int,
        ) -> ::c_int;
        pub fn pthread_rwlockattr_setkind_np(
            attr: *mut ::pthread_rwlockattr_t,
            val: ::c_int,
        ) -> ::c_int;
        pub fn sched_getcpu() -> ::c_int;
        pub fn mallinfo() -> ::mallinfo;
        pub fn malloc_usable_size(ptr: *mut ::c_void) -> ::size_t;
        pub fn getauxval(type_: ::c_ulong) -> ::c_ulong;
        #[cfg_attr(target_os = "netbsd", link_name = "__getpwent_r50")]
        #[cfg_attr(target_os = "solaris", link_name = "__posix_getpwent_r")]
        pub fn getpwent_r(
            pwd: *mut ::passwd,
            buf: *mut ::c_char,
            buflen: ::size_t,
            result: *mut *mut ::passwd,
        ) -> ::c_int;
        #[cfg_attr(target_os = "netbsd", link_name = "__getgrent_r50")]
        #[cfg_attr(target_os = "solaris", link_name = "__posix_getgrent_r")]
        pub fn getgrent_r(
            grp: *mut ::group,
            buf: *mut ::c_char,
            buflen: ::size_t,
            result: *mut *mut ::group,
        ) -> ::c_int;
        pub fn pthread_getname_np(
            thread: ::pthread_t,
            name: *mut ::c_char,
            len: ::size_t,
        ) -> ::c_int;
        pub fn pthread_setname_np(
            thread: ::pthread_t,
            name: *const ::c_char,
        ) -> ::c_int;
    }

    cfg_if! {
        if #[cfg(any(target_arch = "x86",
                     target_arch = "arm",
                     target_arch = "mips",
                     target_arch = "powerpc"))] {
            mod b32;
            pub use self::b32::*;
        } else if #[cfg(any(target_arch = "x86_64",
                            target_arch = "aarch64",
                            target_arch = "powerpc64",
                            target_arch = "mips64",
                            target_arch = "s390x",
                            target_arch = "sparc64"))] {
            mod b64;
            pub use self::b64::*;
        } else {
            // Unknown target_arch
        }
    }

    cfg_if! {
        if #[cfg(libc_align)] {
            mod align;
            pub use self::align::*;
        } else {
            mod no_align;
            pub use self::no_align::*;
        }
    }

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