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    //! Apple (ios/darwin)-specific definitions
    //!
    //! This covers *-apple-* triples currently

    pub type clock_t = c_ulong;
    pub type time_t = c_long;
    pub type suseconds_t = i32;
    pub type dev_t = i32;
    pub type ino_t = u64;
    pub type mode_t = u16;
    pub type nlink_t = u16;
    pub type blksize_t = i32;
    pub type rlim_t = u64;
    pub type mach_timebase_info_data_t = mach_timebase_info;
    pub type pthread_key_t = c_ulong;
    pub type sigset_t = u32;
    pub type fsblkcnt_t = ::c_uint;
    pub type fsfilcnt_t = ::c_uint;
    pub type speed_t = ::c_ulong;
    pub type tcflag_t = ::c_ulong;

    pub enum timezone {}

    s! {
        pub struct glob_t {
            pub gl_pathc:  ::size_t,
            __unused1: ::c_int,
            pub gl_offs:   ::size_t,
            __unused2: ::c_int,
            pub gl_pathv:  *mut *mut ::c_char,

            __unused3: *mut ::c_void,

            __unused4: *mut ::c_void,
            __unused5: *mut ::c_void,
            __unused6: *mut ::c_void,
            __unused7: *mut ::c_void,
            __unused8: *mut ::c_void,
        }

        pub struct sockaddr_storage {
            pub ss_len: u8,
            pub ss_family: ::sa_family_t,
            __ss_pad1: [u8; 6],
            __ss_align: i64,
            __ss_pad2: [u8; 112],
        }

        pub struct addrinfo {
            pub ai_flags: ::c_int,
            pub ai_family: ::c_int,
            pub ai_socktype: ::c_int,
            pub ai_protocol: ::c_int,
            pub ai_addrlen: ::socklen_t,
            pub ai_canonname: *mut ::c_char,
            pub ai_addr: *mut ::sockaddr,
            pub ai_next: *mut addrinfo,
        }

        pub struct mach_timebase_info {
            pub numer: u32,
            pub denom: u32,
        }

        pub struct stat {
            pub st_dev: dev_t,
            pub st_mode: mode_t,
            pub st_nlink: nlink_t,
            pub st_ino: ino_t,
            pub st_uid: ::uid_t,
            pub st_gid: ::gid_t,
            pub st_rdev: dev_t,
            pub st_atime: time_t,
            pub st_atime_nsec: c_long,
            pub st_mtime: time_t,
            pub st_mtime_nsec: c_long,
            pub st_ctime: time_t,
            pub st_ctime_nsec: c_long,
            pub st_birthtime: time_t,
            pub st_birthtime_nsec: c_long,
            pub st_size: ::off_t,
            pub st_blocks: ::blkcnt_t,
            pub st_blksize: blksize_t,
            pub st_flags: ::uint32_t,
            pub st_gen: ::uint32_t,
            pub st_lspare: ::int32_t,
            pub st_qspare: [::int64_t; 2],
        }

        pub struct dirent {
            pub d_ino: u64,
            pub d_seekoff: u64,
            pub d_reclen: u16,
            pub d_namlen: u16,
            pub d_type: u8,
            pub d_name: [::c_char; 1024],
        }

        pub struct pthread_mutex_t {
            __sig: ::c_long,
            __opaque: [u8; __PTHREAD_MUTEX_SIZE__],
        }

        pub struct pthread_mutexattr_t {
            __sig: ::c_long,
            __opaque: [u8; 8],
        }

        pub struct pthread_cond_t {
            __sig: ::c_long,
            __opaque: [u8; __PTHREAD_COND_SIZE__],
        }

        pub struct pthread_rwlock_t {
            __sig: ::c_long,
            __opaque: [u8; __PTHREAD_RWLOCK_SIZE__],
        }

        pub struct siginfo_t {
            pub si_signo: ::c_int,
            pub si_errno: ::c_int,
            pub si_code: ::c_int,
            pub si_pid: ::pid_t,
            pub si_uid: ::uid_t,
            pub si_status: ::c_int,
            pub si_addr: *mut ::c_void,
            _pad: [usize; 9],
        }

        pub struct sigaction {
            pub sa_sigaction: ::sighandler_t,
            pub sa_mask: sigset_t,
            pub sa_flags: ::c_int,
        }

        pub struct stack_t {
            pub ss_sp: *mut ::c_void,
            pub ss_size: ::size_t,
            pub ss_flags: ::c_int,
        }

        pub struct fstore_t {
            pub fst_flags: ::c_uint,
            pub fst_posmode: ::c_int,
            pub fst_offset: ::off_t,
            pub fst_length: ::off_t,
            pub fst_bytesalloc: ::off_t,
        }

        pub struct radvisory {
            pub ra_offset: ::off_t,
            pub ra_count: ::c_int,
        }

        pub struct statvfs {
            pub f_bsize: ::c_ulong,
            pub f_frsize: ::c_ulong,
            pub f_blocks: ::fsblkcnt_t,
            pub f_bfree: ::fsblkcnt_t,
            pub f_bavail: ::fsblkcnt_t,
            pub f_files: ::fsfilcnt_t,
            pub f_ffree: ::fsfilcnt_t,
            pub f_favail: ::fsfilcnt_t,
            pub f_fsid: ::c_ulong,
            pub f_flag: ::c_ulong,
            pub f_namemax: ::c_ulong,
        }

        pub struct Dl_info {
            pub dli_fname: *const ::c_char,
            pub dli_fbase: *mut ::c_void,
            pub dli_sname: *const ::c_char,
            pub dli_saddr: *mut ::c_void,
        }

        pub struct sockaddr_in {
            pub sin_len: u8,
            pub sin_family: ::sa_family_t,
            pub sin_port: ::in_port_t,
            pub sin_addr: ::in_addr,
            pub sin_zero: [::c_char; 8],
        }

        pub struct statfs {
            pub f_bsize: ::uint32_t,
            pub f_iosize: ::int32_t,
            pub f_blocks: ::uint64_t,
            pub f_bfree: ::uint64_t,
            pub f_bavail: ::uint64_t,
            pub f_files: ::uint64_t,
            pub f_ffree: ::uint64_t,
            pub f_fsid: ::fsid_t,
            pub f_owner: ::uid_t,
            pub f_type: ::uint32_t,
            pub f_flags: ::uint32_t,
            pub f_fssubtype: ::uint32_t,
            pub f_fstypename: [::c_char; 16],
            pub f_mntonname: [::c_char; 1024],
            pub f_mntfromname: [::c_char; 1024],
            pub f_reserved: [::uint32_t; 8],
        }

        // FIXME: this should have align 4 but it's got align 8 on 64-bit
        pub struct kevent {
            pub ident: ::uintptr_t,
            pub filter: ::int16_t,
            pub flags: ::uint16_t,
            pub fflags: ::uint32_t,
            pub data: ::intptr_t,
            pub udata: *mut ::c_void,
        }

        pub struct kevent64_s {
            pub ident: ::uint64_t,
            pub filter: ::int16_t,
            pub flags: ::uint16_t,
            pub fflags: ::uint32_t,
            pub data: ::int64_t,
            pub udata: ::uint64_t,
            pub ext: [::uint64_t; 2],
        }

        pub struct dqblk {
            pub dqb_bhardlimit: ::uint64_t,
            pub dqb_bsoftlimit: ::uint64_t,
            pub dqb_curbytes: ::uint64_t,
            pub dqb_ihardlimit: ::uint32_t,
            pub dqb_isoftlimit: ::uint32_t,
            pub dqb_curinodes: ::uint32_t,
            pub dqb_btime: ::uint32_t,
            pub dqb_itime: ::uint32_t,
            pub dqb_id: ::uint32_t,
            pub dqb_spare: [::uint32_t; 4],
        }

        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_cc: [::cc_t; ::NCCS],
            pub c_ispeed: ::speed_t,
            pub c_ospeed: ::speed_t,
        }

        pub struct flock {
            pub l_start: ::off_t,
            pub l_len: ::off_t,
            pub l_pid: ::pid_t,
            pub l_type: ::c_short,
            pub l_whence: ::c_short,
        }

        pub struct sf_hdtr {
            pub headers: *mut ::iovec,
            pub hdr_cnt: ::c_int,
            pub trailers: *mut ::iovec,
            pub trl_cnt: ::c_int,
        }
    }

    pub const EXIT_FAILURE: ::c_int = 1;
    pub const EXIT_SUCCESS: ::c_int = 0;
    pub const RAND_MAX: ::c_int = 2147483647;
    pub const EOF: ::c_int = -1;
    pub const SEEK_SET: ::c_int = 0;
    pub const SEEK_CUR: ::c_int = 1;
    pub const SEEK_END: ::c_int = 2;
    pub const _IOFBF: ::c_int = 0;
    pub const _IONBF: ::c_int = 2;
    pub const _IOLBF: ::c_int = 1;
    pub const BUFSIZ: ::c_uint = 1024;
    pub const FOPEN_MAX: ::c_uint = 20;
    pub const FILENAME_MAX: ::c_uint = 1024;
    pub const L_tmpnam: ::c_uint = 1024;
    pub const TMP_MAX: ::c_uint = 308915776;
    pub const _PC_NAME_MAX: ::c_int = 4;

    pub const O_RDONLY: ::c_int = 0;
    pub const O_WRONLY: ::c_int = 1;
    pub const O_RDWR: ::c_int = 2;
    pub const O_APPEND: ::c_int = 8;
    pub const O_CREAT: ::c_int = 512;
    pub const O_EXCL: ::c_int = 2048;
    pub const O_NOCTTY: ::c_int = 131072;
    pub const O_TRUNC: ::c_int = 1024;
    pub const O_CLOEXEC: ::c_int = 0x1000000;
    pub const O_DIRECTORY: ::c_int = 0x100000;
    pub const S_IFIFO: mode_t = 4096;
    pub const S_IFCHR: mode_t = 8192;
    pub const S_IFBLK: mode_t = 24576;
    pub const S_IFDIR: mode_t = 16384;
    pub const S_IFREG: mode_t = 32768;
    pub const S_IFLNK: mode_t = 40960;
    pub const S_IFSOCK: mode_t = 49152;
    pub const S_IFMT: mode_t = 61440;
    pub const S_IEXEC: mode_t = 64;
    pub const S_IWRITE: mode_t = 128;
    pub const S_IREAD: mode_t = 256;
    pub const S_IRWXU: mode_t = 448;
    pub const S_IXUSR: mode_t = 64;
    pub const S_IWUSR: mode_t = 128;
    pub const S_IRUSR: mode_t = 256;
    pub const S_IRWXG: mode_t = 56;
    pub const S_IXGRP: mode_t = 8;
    pub const S_IWGRP: mode_t = 16;
    pub const S_IRGRP: mode_t = 32;
    pub const S_IRWXO: mode_t = 7;
    pub const S_IXOTH: mode_t = 1;
    pub const S_IWOTH: mode_t = 2;
    pub const S_IROTH: mode_t = 4;
    pub const F_OK: ::c_int = 0;
    pub const R_OK: ::c_int = 4;
    pub const W_OK: ::c_int = 2;
    pub const X_OK: ::c_int = 1;
    pub const STDIN_FILENO: ::c_int = 0;
    pub const STDOUT_FILENO: ::c_int = 1;
    pub const STDERR_FILENO: ::c_int = 2;
    pub const F_LOCK: ::c_int = 1;
    pub const F_TEST: ::c_int = 3;
    pub const F_TLOCK: ::c_int = 2;
    pub const F_ULOCK: ::c_int = 0;
    pub const F_GETLK: ::c_int = 7;
    pub const F_SETLK: ::c_int = 8;
    pub const F_SETLKW: ::c_int = 9;
    pub const SIGHUP: ::c_int = 1;
    pub const SIGINT: ::c_int = 2;
    pub const SIGQUIT: ::c_int = 3;
    pub const SIGILL: ::c_int = 4;
    pub const SIGABRT: ::c_int = 6;
    pub const SIGFPE: ::c_int = 8;
    pub const SIGKILL: ::c_int = 9;
    pub const SIGSEGV: ::c_int = 11;
    pub const SIGPIPE: ::c_int = 13;
    pub const SIGALRM: ::c_int = 14;
    pub const SIGTERM: ::c_int = 15;

    pub const PROT_NONE: ::c_int = 0;
    pub const PROT_READ: ::c_int = 1;
    pub const PROT_WRITE: ::c_int = 2;
    pub const PROT_EXEC: ::c_int = 4;

    pub const MAP_FILE: ::c_int = 0x0000;
    pub const MAP_SHARED: ::c_int = 0x0001;
    pub const MAP_PRIVATE: ::c_int = 0x0002;
    pub const MAP_FIXED: ::c_int = 0x0010;
    pub const MAP_ANON: ::c_int = 0x1000;

    pub const MAP_FAILED: *mut ::c_void = !0 as *mut ::c_void;

    pub const MCL_CURRENT: ::c_int = 0x0001;
    pub const MCL_FUTURE: ::c_int = 0x0002;

    pub const MS_ASYNC: ::c_int = 0x0001;
    pub const MS_INVALIDATE: ::c_int = 0x0002;
    pub const MS_SYNC: ::c_int = 0x0010;

    pub const MS_KILLPAGES: ::c_int = 0x0004;
    pub const MS_DEACTIVATE: ::c_int = 0x0008;

    pub const EPERM: ::c_int = 1;
    pub const ENOENT: ::c_int = 2;
    pub const ESRCH: ::c_int = 3;
    pub const EINTR: ::c_int = 4;
    pub const EIO: ::c_int = 5;
    pub const ENXIO: ::c_int = 6;
    pub const E2BIG: ::c_int = 7;
    pub const ENOEXEC: ::c_int = 8;
    pub const EBADF: ::c_int = 9;
    pub const ECHILD: ::c_int = 10;
    pub const EDEADLK: ::c_int = 11;
    pub const ENOMEM: ::c_int = 12;
    pub const EACCES: ::c_int = 13;
    pub const EFAULT: ::c_int = 14;
    pub const ENOTBLK: ::c_int = 15;
    pub const EBUSY: ::c_int = 16;
    pub const EEXIST: ::c_int = 17;
    pub const EXDEV: ::c_int = 18;
    pub const ENODEV: ::c_int = 19;
    pub const ENOTDIR: ::c_int = 20;
    pub const EISDIR: ::c_int = 21;
    pub const EINVAL: ::c_int = 22;
    pub const ENFILE: ::c_int = 23;
    pub const EMFILE: ::c_int = 24;
    pub const ENOTTY: ::c_int = 25;
    pub const ETXTBSY: ::c_int = 26;
    pub const EFBIG: ::c_int = 27;
    pub const ENOSPC: ::c_int = 28;
    pub const ESPIPE: ::c_int = 29;
    pub const EROFS: ::c_int = 30;
    pub const EMLINK: ::c_int = 31;
    pub const EPIPE: ::c_int = 32;
    pub const EDOM: ::c_int = 33;
    pub const ERANGE: ::c_int = 34;
    pub const EAGAIN: ::c_int = 35;
    pub const EWOULDBLOCK: ::c_int = EAGAIN;
    pub const EINPROGRESS: ::c_int = 36;
    pub const EALREADY: ::c_int = 37;
    pub const ENOTSOCK: ::c_int = 38;
    pub const EDESTADDRREQ: ::c_int = 39;
    pub const EMSGSIZE: ::c_int = 40;
    pub const EPROTOTYPE: ::c_int = 41;
    pub const ENOPROTOOPT: ::c_int = 42;
    pub const EPROTONOSUPPORT: ::c_int = 43;
    pub const ESOCKTNOSUPPORT: ::c_int = 44;
    pub const ENOTSUP: ::c_int = 45;
    pub const EPFNOSUPPORT: ::c_int = 46;
    pub const EAFNOSUPPORT: ::c_int = 47;
    pub const EADDRINUSE: ::c_int = 48;
    pub const EADDRNOTAVAIL: ::c_int = 49;
    pub const ENETDOWN: ::c_int = 50;
    pub const ENETUNREACH: ::c_int = 51;
    pub const ENETRESET: ::c_int = 52;
    pub const ECONNABORTED: ::c_int = 53;
    pub const ECONNRESET: ::c_int = 54;
    pub const ENOBUFS: ::c_int = 55;
    pub const EISCONN: ::c_int = 56;
    pub const ENOTCONN: ::c_int = 57;
    pub const ESHUTDOWN: ::c_int = 58;
    pub const ETOOMANYREFS: ::c_int = 59;
    pub const ETIMEDOUT: ::c_int = 60;
    pub const ECONNREFUSED: ::c_int = 61;
    pub const ELOOP: ::c_int = 62;
    pub const ENAMETOOLONG: ::c_int = 63;
    pub const EHOSTDOWN: ::c_int = 64;
    pub const EHOSTUNREACH: ::c_int = 65;
    pub const ENOTEMPTY: ::c_int = 66;
    pub const EPROCLIM: ::c_int = 67;
    pub const EUSERS: ::c_int = 68;
    pub const EDQUOT: ::c_int = 69;
    pub const ESTALE: ::c_int = 70;
    pub const EREMOTE: ::c_int = 71;
    pub const EBADRPC: ::c_int = 72;
    pub const ERPCMISMATCH: ::c_int = 73;
    pub const EPROGUNAVAIL: ::c_int = 74;
    pub const EPROGMISMATCH: ::c_int = 75;
    pub const EPROCUNAVAIL: ::c_int = 76;
    pub const ENOLCK: ::c_int = 77;
    pub const ENOSYS: ::c_int = 78;
    pub const EFTYPE: ::c_int = 79;
    pub const EAUTH: ::c_int = 80;
    pub const ENEEDAUTH: ::c_int = 81;
    pub const EPWROFF: ::c_int = 82;
    pub const EDEVERR: ::c_int = 83;
    pub const EOVERFLOW: ::c_int = 84;
    pub const EBADEXEC: ::c_int = 85;
    pub const EBADARCH: ::c_int = 86;
    pub const ESHLIBVERS: ::c_int = 87;
    pub const EBADMACHO: ::c_int = 88;
    pub const ECANCELED: ::c_int = 89;
    pub const EIDRM: ::c_int = 90;
    pub const ENOMSG: ::c_int = 91;
    pub const EILSEQ: ::c_int = 92;
    pub const ENOATTR: ::c_int = 93;
    pub const EBADMSG: ::c_int = 94;
    pub const EMULTIHOP: ::c_int = 95;
    pub const ENODATA: ::c_int = 96;
    pub const ENOLINK: ::c_int = 97;
    pub const ENOSR: ::c_int = 98;
    pub const ENOSTR: ::c_int = 99;
    pub const EPROTO: ::c_int = 100;
    pub const ETIME: ::c_int = 101;
    pub const EOPNOTSUPP: ::c_int = 102;
    pub const ENOPOLICY: ::c_int = 103;
    pub const ENOTRECOVERABLE: ::c_int = 104;
    pub const EOWNERDEAD: ::c_int = 105;
    pub const EQFULL: ::c_int = 106;
    pub const ELAST: ::c_int = 106;

    pub const F_DUPFD: ::c_int = 0;
    pub const F_DUPFD_CLOEXEC: ::c_int = 67;
    pub const F_GETFD: ::c_int = 1;
    pub const F_SETFD: ::c_int = 2;
    pub const F_GETFL: ::c_int = 3;
    pub const F_SETFL: ::c_int = 4;
    pub const F_PREALLOCATE: ::c_int = 42;
    pub const F_RDADVISE: ::c_int = 44;
    pub const F_RDAHEAD: ::c_int = 45;
    pub const F_NOCACHE: ::c_int = 48;
    pub const F_GETPATH: ::c_int = 50;
    pub const F_FULLFSYNC: ::c_int = 51;
    pub const F_FREEZE_FS: ::c_int = 53;
    pub const F_THAW_FS: ::c_int = 54;
    pub const F_GLOBAL_NOCACHE: ::c_int = 55;
    pub const F_NODIRECT: ::c_int = 62;

    pub const F_ALLOCATECONTIG: ::c_uint = 0x02;
    pub const F_ALLOCATEALL: ::c_uint = 0x04;

    pub const F_PEOFPOSMODE: ::c_int = 3;
    pub const F_VOLPOSMODE: ::c_int = 4;

    pub const O_ACCMODE: ::c_int = 3;

    pub const SIGTRAP: ::c_int = 5;

    pub const GLOB_APPEND  : ::c_int = 0x0001;
    pub const GLOB_DOOFFS  : ::c_int = 0x0002;
    pub const GLOB_ERR     : ::c_int = 0x0004;
    pub const GLOB_MARK    : ::c_int = 0x0008;
    pub const GLOB_NOCHECK : ::c_int = 0x0010;
    pub const GLOB_NOSORT  : ::c_int = 0x0020;
    pub const GLOB_NOESCAPE: ::c_int = 0x2000;

    pub const GLOB_NOSPACE : ::c_int = -1;
    pub const GLOB_ABORTED : ::c_int = -2;
    pub const GLOB_NOMATCH : ::c_int = -3;

    pub const POSIX_MADV_NORMAL: ::c_int = 0;
    pub const POSIX_MADV_RANDOM: ::c_int = 1;
    pub const POSIX_MADV_SEQUENTIAL: ::c_int = 2;
    pub const POSIX_MADV_WILLNEED: ::c_int = 3;
    pub const POSIX_MADV_DONTNEED: ::c_int = 4;

    pub const _SC_IOV_MAX: ::c_int = 56;
    pub const _SC_GETGR_R_SIZE_MAX: ::c_int = 70;
    pub const _SC_GETPW_R_SIZE_MAX: ::c_int = 71;
    pub const _SC_LOGIN_NAME_MAX: ::c_int = 73;
    pub const _SC_MQ_PRIO_MAX: ::c_int = 75;
    pub const _SC_THREAD_ATTR_STACKADDR: ::c_int = 82;
    pub const _SC_THREAD_ATTR_STACKSIZE: ::c_int = 83;
    pub const _SC_THREAD_DESTRUCTOR_ITERATIONS: ::c_int = 85;
    pub const _SC_THREAD_KEYS_MAX: ::c_int = 86;
    pub const _SC_THREAD_PRIO_INHERIT: ::c_int = 87;
    pub const _SC_THREAD_PRIO_PROTECT: ::c_int = 88;
    pub const _SC_THREAD_PRIORITY_SCHEDULING: ::c_int = 89;
    pub const _SC_THREAD_PROCESS_SHARED: ::c_int = 90;
    pub const _SC_THREAD_SAFE_FUNCTIONS: ::c_int = 91;
    pub const _SC_THREAD_STACK_MIN: ::c_int = 93;
    pub const _SC_THREAD_THREADS_MAX: ::c_int = 94;
    pub const _SC_THREADS: ::c_int = 96;
    pub const _SC_TTY_NAME_MAX: ::c_int = 101;
    pub const _SC_ATEXIT_MAX: ::c_int = 107;
    pub const _SC_XOPEN_CRYPT: ::c_int = 108;
    pub const _SC_XOPEN_ENH_I18N: ::c_int = 109;
    pub const _SC_XOPEN_LEGACY: ::c_int = 110;
    pub const _SC_XOPEN_REALTIME: ::c_int = 111;
    pub const _SC_XOPEN_REALTIME_THREADS: ::c_int = 112;
    pub const _SC_XOPEN_SHM: ::c_int = 113;
    pub const _SC_XOPEN_UNIX: ::c_int = 115;
    pub const _SC_XOPEN_VERSION: ::c_int = 116;
    pub const _SC_XOPEN_XCU_VERSION: ::c_int = 121;

    pub const PTHREAD_CREATE_JOINABLE: ::c_int = 1;
    pub const PTHREAD_CREATE_DETACHED: ::c_int = 2;
    pub const PTHREAD_STACK_MIN: ::size_t = 8192;

    pub const RLIMIT_CPU: ::c_int = 0;
    pub const RLIMIT_FSIZE: ::c_int = 1;
    pub const RLIMIT_DATA: ::c_int = 2;
    pub const RLIMIT_STACK: ::c_int = 3;
    pub const RLIMIT_CORE: ::c_int = 4;
    pub const RLIMIT_AS: ::c_int = 5;
    pub const RLIMIT_MEMLOCK: ::c_int = 6;
    pub const RLIMIT_NPROC: ::c_int = 7;
    pub const RLIMIT_NOFILE: ::c_int = 8;
    pub const RLIM_NLIMITS: ::c_int = 9;
    pub const _RLIMIT_POSIX_FLAG: ::c_int = 0x1000;

    pub const RLIM_INFINITY: rlim_t = 0x7fff_ffff_ffff_ffff;

    pub const RUSAGE_SELF: ::c_int = 0;
    pub const RUSAGE_CHILDREN: ::c_int = -1;

    pub const MADV_NORMAL: ::c_int = 0;
    pub const MADV_RANDOM: ::c_int = 1;
    pub const MADV_SEQUENTIAL: ::c_int = 2;
    pub const MADV_WILLNEED: ::c_int = 3;
    pub const MADV_DONTNEED: ::c_int = 4;
    pub const MADV_FREE: ::c_int = 5;
    pub const MADV_ZERO_WIRED_PAGES: ::c_int = 6;
    pub const MADV_FREE_REUSABLE: ::c_int = 7;
    pub const MADV_FREE_REUSE: ::c_int = 8;
    pub const MADV_CAN_REUSE: ::c_int = 9;

    pub const MINCORE_INCORE: ::c_int =  0x1;
    pub const MINCORE_REFERENCED: ::c_int = 0x2;
    pub const MINCORE_MODIFIED: ::c_int = 0x4;
    pub const MINCORE_REFERENCED_OTHER: ::c_int = 0x8;
    pub const MINCORE_MODIFIED_OTHER: ::c_int = 0x10;

    pub const AF_UNIX: ::c_int = 1;
    pub const AF_INET: ::c_int = 2;
    pub const AF_INET6: ::c_int = 30;
    pub const SOCK_STREAM: ::c_int = 1;
    pub const SOCK_DGRAM: ::c_int = 2;
    pub const SOCK_RAW: ::c_int = 3;
    pub const IPPROTO_TCP: ::c_int = 6;
    pub const IPPROTO_IP: ::c_int = 0;
    pub const IPPROTO_IPV6: ::c_int = 41;
    pub const IP_MULTICAST_TTL: ::c_int = 10;
    pub const IP_MULTICAST_LOOP: ::c_int = 11;
    pub const IP_TTL: ::c_int = 4;
    pub const IP_HDRINCL: ::c_int = 2;
    pub const IP_ADD_MEMBERSHIP: ::c_int = 12;
    pub const IP_DROP_MEMBERSHIP: ::c_int = 13;
    pub const IPV6_JOIN_GROUP: ::c_int = 12;
    pub const IPV6_LEAVE_GROUP: ::c_int = 13;

    pub const TCP_NODELAY: ::c_int = 0x01;
    pub const TCP_KEEPALIVE: ::c_int = 0x10;
    pub const SOL_SOCKET: ::c_int = 0xffff;

    pub const SO_DEBUG: ::c_int = 0x01;
    pub const SO_ACCEPTCONN: ::c_int = 0x0002;
    pub const SO_REUSEADDR: ::c_int = 0x0004;
    pub const SO_KEEPALIVE: ::c_int = 0x0008;
    pub const SO_DONTROUTE: ::c_int = 0x0010;
    pub const SO_BROADCAST: ::c_int = 0x0020;
    pub const SO_USELOOPBACK: ::c_int = 0x0040;
    pub const SO_LINGER: ::c_int = 0x0080;
    pub const SO_OOBINLINE: ::c_int = 0x0100;
    pub const SO_REUSEPORT: ::c_int = 0x0200;
    pub const SO_SNDBUF: ::c_int = 0x1001;
    pub const SO_RCVBUF: ::c_int = 0x1002;
    pub const SO_SNDLOWAT: ::c_int = 0x1003;
    pub const SO_RCVLOWAT: ::c_int = 0x1004;
    pub const SO_SNDTIMEO: ::c_int = 0x1005;
    pub const SO_RCVTIMEO: ::c_int = 0x1006;
    pub const SO_ERROR: ::c_int = 0x1007;
    pub const SO_TYPE: ::c_int = 0x1008;

    pub const IFF_LOOPBACK: ::c_int = 0x8;

    pub const SHUT_RD: ::c_int = 0;
    pub const SHUT_WR: ::c_int = 1;
    pub const SHUT_RDWR: ::c_int = 2;

    pub const LOCK_SH: ::c_int = 1;
    pub const LOCK_EX: ::c_int = 2;
    pub const LOCK_NB: ::c_int = 4;
    pub const LOCK_UN: ::c_int = 8;

    pub const O_DSYNC: ::c_int = 4194304;
    pub const O_SYNC: ::c_int = 128;
    pub const O_NONBLOCK: ::c_int = 4;

    pub const MAP_COPY: ::c_int = 0x0002;
    pub const MAP_RENAME: ::c_int = 0x0020;
    pub const MAP_NORESERVE: ::c_int = 0x0040;
    pub const MAP_NOEXTEND: ::c_int = 0x0100;
    pub const MAP_HASSEMAPHORE: ::c_int = 0x0200;
    pub const MAP_NOCACHE: ::c_int = 0x0400;
    pub const MAP_JIT: ::c_int = 0x0800;

    pub const IPPROTO_RAW: ::c_int = 255;

    pub const SO_NREAD: ::c_int = 0x1020;
    pub const SO_NKE: ::c_int = 0x1021;
    pub const SO_NOSIGPIPE: ::c_int = 0x1022;
    pub const SO_NOADDRERR: ::c_int = 0x1023;
    pub const SO_NWRITE: ::c_int = 0x1024;
    pub const SO_DONTTRUNC: ::c_int = 0x2000;
    pub const SO_WANTMORE: ::c_int = 0x4000;
    pub const SO_WANTOOBFLAG: ::c_int = 0x8000;

    pub const _SC_ARG_MAX: ::c_int = 1;
    pub const _SC_CHILD_MAX: ::c_int = 2;
    pub const _SC_CLK_TCK: ::c_int = 3;
    pub const _SC_NGROUPS_MAX: ::c_int = 4;
    pub const _SC_OPEN_MAX: ::c_int = 5;
    pub const _SC_JOB_CONTROL: ::c_int = 6;
    pub const _SC_SAVED_IDS: ::c_int = 7;
    pub const _SC_VERSION: ::c_int = 8;
    pub const _SC_BC_BASE_MAX: ::c_int = 9;
    pub const _SC_BC_DIM_MAX: ::c_int = 10;
    pub const _SC_BC_SCALE_MAX: ::c_int = 11;
    pub const _SC_BC_STRING_MAX: ::c_int = 12;
    pub const _SC_COLL_WEIGHTS_MAX: ::c_int = 13;
    pub const _SC_EXPR_NEST_MAX: ::c_int = 14;
    pub const _SC_LINE_MAX: ::c_int = 15;
    pub const _SC_RE_DUP_MAX: ::c_int = 16;
    pub const _SC_2_VERSION: ::c_int = 17;
    pub const _SC_2_C_BIND: ::c_int = 18;
    pub const _SC_2_C_DEV: ::c_int = 19;
    pub const _SC_2_CHAR_TERM: ::c_int = 20;
    pub const _SC_2_FORT_DEV: ::c_int = 21;
    pub const _SC_2_FORT_RUN: ::c_int = 22;
    pub const _SC_2_LOCALEDEF: ::c_int = 23;
    pub const _SC_2_SW_DEV: ::c_int = 24;
    pub const _SC_2_UPE: ::c_int = 25;
    pub const _SC_STREAM_MAX: ::c_int = 26;
    pub const _SC_TZNAME_MAX: ::c_int = 27;
    pub const _SC_ASYNCHRONOUS_IO: ::c_int = 28;
    pub const _SC_PAGESIZE: ::c_int = 29;
    pub const _SC_MEMLOCK: ::c_int = 30;
    pub const _SC_MEMLOCK_RANGE: ::c_int = 31;
    pub const _SC_MEMORY_PROTECTION: ::c_int = 32;
    pub const _SC_MESSAGE_PASSING: ::c_int = 33;
    pub const _SC_PRIORITIZED_IO: ::c_int = 34;
    pub const _SC_PRIORITY_SCHEDULING: ::c_int = 35;
    pub const _SC_REALTIME_SIGNALS: ::c_int = 36;
    pub const _SC_SEMAPHORES: ::c_int = 37;
    pub const _SC_FSYNC: ::c_int = 38;
    pub const _SC_SHARED_MEMORY_OBJECTS: ::c_int = 39;
    pub const _SC_SYNCHRONIZED_IO: ::c_int = 40;
    pub const _SC_TIMERS: ::c_int = 41;
    pub const _SC_AIO_LISTIO_MAX: ::c_int = 42;
    pub const _SC_AIO_MAX: ::c_int = 43;
    pub const _SC_AIO_PRIO_DELTA_MAX: ::c_int = 44;
    pub const _SC_DELAYTIMER_MAX: ::c_int = 45;
    pub const _SC_MQ_OPEN_MAX: ::c_int = 46;
    pub const _SC_MAPPED_FILES: ::c_int = 47;
    pub const _SC_RTSIG_MAX: ::c_int = 48;
    pub const _SC_SEM_NSEMS_MAX: ::c_int = 49;
    pub const _SC_SEM_VALUE_MAX: ::c_int = 50;
    pub const _SC_SIGQUEUE_MAX: ::c_int = 51;
    pub const _SC_TIMER_MAX: ::c_int = 52;
    pub const _SC_NPROCESSORS_CONF: ::c_int = 57;
    pub const _SC_NPROCESSORS_ONLN: ::c_int = 58;
    pub const _SC_2_PBS: ::c_int = 59;
    pub const _SC_2_PBS_ACCOUNTING: ::c_int = 60;
    pub const _SC_2_PBS_CHECKPOINT: ::c_int = 61;
    pub const _SC_2_PBS_LOCATE: ::c_int = 62;
    pub const _SC_2_PBS_MESSAGE: ::c_int = 63;
    pub const _SC_2_PBS_TRACK: ::c_int = 64;
    pub const _SC_ADVISORY_INFO: ::c_int = 65;
    pub const _SC_BARRIERS: ::c_int = 66;
    pub const _SC_CLOCK_SELECTION: ::c_int = 67;
    pub const _SC_CPUTIME: ::c_int = 68;
    pub const _SC_FILE_LOCKING: ::c_int = 69;
    pub const _SC_HOST_NAME_MAX: ::c_int = 72;
    pub const _SC_MONOTONIC_CLOCK: ::c_int = 74;
    pub const _SC_READER_WRITER_LOCKS: ::c_int = 76;
    pub const _SC_REGEXP: ::c_int = 77;
    pub const _SC_SHELL: ::c_int = 78;
    pub const _SC_SPAWN: ::c_int = 79;
    pub const _SC_SPIN_LOCKS: ::c_int = 80;
    pub const _SC_SPORADIC_SERVER: ::c_int = 81;
    pub const _SC_THREAD_CPUTIME: ::c_int = 84;
    pub const _SC_THREAD_SPORADIC_SERVER: ::c_int = 92;
    pub const _SC_TIMEOUTS: ::c_int = 95;
    pub const _SC_TRACE: ::c_int = 97;
    pub const _SC_TRACE_EVENT_FILTER: ::c_int = 98;
    pub const _SC_TRACE_INHERIT: ::c_int = 99;
    pub const _SC_TRACE_LOG: ::c_int = 100;
    pub const _SC_TYPED_MEMORY_OBJECTS: ::c_int = 102;
    pub const _SC_V6_ILP32_OFF32: ::c_int = 103;
    pub const _SC_V6_ILP32_OFFBIG: ::c_int = 104;
    pub const _SC_V6_LP64_OFF64: ::c_int = 105;
    pub const _SC_V6_LPBIG_OFFBIG: ::c_int = 106;
    pub const _SC_IPV6: ::c_int = 118;
    pub const _SC_RAW_SOCKETS: ::c_int = 119;
    pub const _SC_SYMLOOP_MAX: ::c_int = 120;
    pub const _SC_PAGE_SIZE: ::c_int = _SC_PAGESIZE;
    pub const _SC_XOPEN_STREAMS: ::c_int = 114;
    pub const _SC_XBS5_ILP32_OFF32: ::c_int = 122;
    pub const _SC_XBS5_ILP32_OFFBIG: ::c_int = 123;
    pub const _SC_XBS5_LP64_OFF64: ::c_int = 124;
    pub const _SC_XBS5_LPBIG_OFFBIG: ::c_int = 125;
    pub const _SC_SS_REPL_MAX: ::c_int = 126;
    pub const _SC_TRACE_EVENT_NAME_MAX: ::c_int = 127;
    pub const _SC_TRACE_NAME_MAX: ::c_int = 128;
    pub const _SC_TRACE_SYS_MAX: ::c_int = 129;
    pub const _SC_TRACE_USER_EVENT_MAX: ::c_int = 130;
    pub const _SC_PASS_MAX: ::c_int = 131;

    pub const PTHREAD_MUTEX_RECURSIVE: ::c_int = 2;
    pub const _PTHREAD_MUTEX_SIG_init: ::c_long = 0x32AAABA7;
    pub const _PTHREAD_COND_SIG_init: ::c_long = 0x3CB0B1BB;
    pub const _PTHREAD_RWLOCK_SIG_init: ::c_long = 0x2DA8B3B4;
    pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = pthread_mutex_t {
        __sig: _PTHREAD_MUTEX_SIG_init,
        __opaque: [0; __PTHREAD_MUTEX_SIZE__],
    };
    pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = pthread_cond_t {
        __sig: _PTHREAD_COND_SIG_init,
        __opaque: [0; __PTHREAD_COND_SIZE__],
    };
    pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = pthread_rwlock_t {
        __sig: _PTHREAD_RWLOCK_SIG_init,
        __opaque: [0; __PTHREAD_RWLOCK_SIZE__],
    };

    pub const SIGSTKSZ: ::size_t = 131072;

    pub const FD_SETSIZE: usize = 1024;

    pub const ST_NOSUID: ::c_ulong = 2;

    pub const HW_AVAILCPU: ::c_int = 25;

    pub const EVFILT_AIO: ::int16_t = 0xfffd;
    pub const EVFILT_PROC: ::int16_t = 0xfffb;
    pub const EVFILT_READ: ::int16_t = 0xffff;
    pub const EVFILT_SIGNAL: ::int16_t = 0xfffa;
    pub const EVFILT_SYSCOUNT: ::int16_t = 0xe;
    pub const EVFILT_TIMER: ::int16_t = 0xfff9;
    pub const EVFILT_VNODE: ::int16_t = 0xfffc;
    pub const EVFILT_WRITE: ::int16_t = 0xfffe;
    pub const EVFILT_FS: ::int16_t = 0xfff7;
    pub const EVFILT_MACHPORT: ::int16_t = 0xfff8;
    pub const EVFILT_USER: ::int16_t = 0xfff6;
    pub const EVFILT_VM: ::int16_t = 0xfff4;

    pub const EV_DISPATCH: ::uint16_t = 0x80;
    pub const EV_FLAG0: ::uint16_t = 0x1000;
    pub const EV_OOBAND: ::uint16_t = 0x2000;
    pub const EV_POLL: ::uint16_t = 0x1000;
    pub const EV_RECEIPT: ::uint16_t = 0x40;

    pub const NOTE_ABSOLUTE: ::uint32_t = 0x8;
    pub const NOTE_EXITSTATUS: ::uint32_t = 0x04000000;
    pub const NOTE_EXIT_REPARENTED: ::uint32_t = 0x00080000;
    pub const NOTE_FFAND: ::uint32_t = 0x40000000;
    pub const NOTE_FFCOPY: ::uint32_t = 0xc0000000;
    pub const NOTE_FFCTRLMASK: ::uint32_t = 0xc0000000;
    pub const NOTE_FFLAGSMASK: ::uint32_t = 0x00ffffff;
    pub const NOTE_FFNOP: ::uint32_t = 0x0;
    pub const NOTE_FFOR: ::uint32_t = 0x80000000;
    pub const NOTE_NONE: ::uint32_t = 0x80;
    pub const NOTE_NSECONDS: ::uint32_t = 0x4;
    pub const NOTE_REAP: ::uint32_t = 0x10000000;
    pub const NOTE_SECONDS: ::uint32_t = 0x1;
    pub const NOTE_SIGNAL: ::uint32_t = 0x8000000;
    pub const NOTE_TRIGGER: ::uint32_t = 0x01000000;
    pub const NOTE_USECONDS: ::uint32_t = 0x2;
    pub const NOTE_VM_ERROR: ::uint32_t = 0x10000000;
    pub const NOTE_VM_PRESSURE: ::uint32_t = 0x80000000;
    pub const NOTE_VM_PRESSURE_SUDDEN_TERMINATE: ::uint32_t = 0x20000000;
    pub const NOTE_VM_PRESSURE_TERMINATE: ::uint32_t = 0x40000000;
    pub const NOTE_PCTRLMASK: ::uint32_t = 0xfff00000;

    pub const NL0: ::c_int  = 0x00000000;
    pub const NL1: ::c_int  = 0x00000100;
    pub const TAB0: ::c_int = 0x00000000;
    pub const TAB1: ::c_int = 0x00000400;
    pub const TAB2: ::c_int = 0x00000800;
    pub const CR0: ::c_int  = 0x00000000;
    pub const CR1: ::c_int  = 0x00001000;
    pub const CR2: ::c_int  = 0x00002000;
    pub const CR3: ::c_int  = 0x00003000;
    pub const FF0: ::c_int  = 0x00000000;
    pub const FF1: ::c_int  = 0x00004000;
    pub const BS0: ::c_int  = 0x00000000;
    pub const BS1: ::c_int  = 0x00008000;
    pub const TAB3: ::c_int = 0x00000004;
    pub const VT0: ::c_int  = 0x00000000;
    pub const VT1: ::c_int  = 0x00010000;
    pub const IUTF8: ::tcflag_t = 0x00004000;
    pub const CRTSCTS: ::tcflag_t = 0x00030000;

    pub const NI_MAXHOST: ::socklen_t = 1025;

    pub const Q_GETQUOTA: ::c_int = 0x300;
    pub const Q_SETQUOTA: ::c_int = 0x400;

    pub const RTLD_LOCAL: ::c_int = 0x4;
    pub const RTLD_FIRST: ::c_int = 0x100;
    pub const RTLD_NODELETE: ::c_int = 0x80;
    pub const RTLD_NOLOAD: ::c_int = 0x10;
    pub const RTLD_GLOBAL: ::c_int = 0x8;

    extern {
        pub fn getnameinfo(sa: *const ::sockaddr,
                           salen: ::socklen_t,
                           host: *mut ::c_char,
                           hostlen: ::socklen_t,
                           serv: *mut ::c_char,
                           sevlen: ::socklen_t,
                           flags: ::c_int) -> ::c_int;
        pub fn mincore(addr: *const ::c_void, len: ::size_t,
                       vec: *mut ::c_char) -> ::c_int;
        pub fn sysctlnametomib(name: *const ::c_char,
                               mibp: *mut ::c_int,
                               sizep: *mut ::size_t)
                               -> ::c_int;
        #[cfg_attr(all(target_os = "macos", target_arch = "x86"),
                   link_name = "mprotect$UNIX2003")]
        pub fn mprotect(addr: *mut ::c_void, len: ::size_t, prot: ::c_int)
                        -> ::c_int;
        pub fn shm_open(name: *const ::c_char, oflag: ::c_int, ...) -> ::c_int;
        pub fn sysctl(name: *mut ::c_int,
                      namelen: ::c_uint,
                      oldp: *mut ::c_void,
                      oldlenp: *mut ::size_t,
                      newp: *mut ::c_void,
                      newlen: ::size_t)
                      -> ::c_int;
        pub fn sysctlbyname(name: *const ::c_char,
                            oldp: *mut ::c_void,
                            oldlenp: *mut ::size_t,
                            newp: *mut ::c_void,
                            newlen: ::size_t)
                            -> ::c_int;
        pub fn mach_absolute_time() -> u64;
        pub fn mach_timebase_info(info: *mut ::mach_timebase_info) -> ::c_int;
        pub fn pthread_setname_np(name: *const ::c_char) -> ::c_int;
        pub fn pthread_get_stackaddr_np(thread: ::pthread_t) -> *mut ::c_void;
        pub fn pthread_get_stacksize_np(thread: ::pthread_t) -> ::size_t;
        pub fn __error() -> *mut ::c_int;
        pub fn backtrace(buf: *mut *mut ::c_void,
                         sz: ::c_int) -> ::c_int;
        #[cfg_attr(target_os = "macos", link_name = "statfs$INODE64")]
        pub fn statfs(path: *const ::c_char, buf: *mut statfs) -> ::c_int;
        #[cfg_attr(target_os = "macos", link_name = "fstatfs$INODE64")]
        pub fn fstatfs(fd: ::c_int, buf: *mut statfs) -> ::c_int;
        pub fn kevent(kq: ::c_int,
                      changelist: *const ::kevent,
                      nchanges: ::c_int,
                      eventlist: *mut ::kevent,
                      nevents: ::c_int,
                      timeout: *const ::timespec) -> ::c_int;
        pub fn kevent64(kq: ::c_int,
                        changelist: *const ::kevent64_s,
                        nchanges: ::c_int,
                        eventlist: *mut ::kevent64_s,
                        nevents: ::c_int,
                        flags: ::c_uint,
                        timeout: *const ::timespec) -> ::c_int;
        pub fn mount(src: *const ::c_char,
                     target: *const ::c_char,
                     flags: ::c_int,
                     data: *mut ::c_void) -> ::c_int;
        pub fn ptrace(requeset: ::c_int,
                      pid: ::pid_t,
                      addr: *mut ::c_char,
                      data: ::c_int) -> ::c_int;
        pub fn quotactl(special: *const ::c_char,
                        cmd: ::c_int,
                        id: ::c_int,
                        data: *mut ::c_char) -> ::c_int;
        pub fn sethostname(name: *const ::c_char, len: ::c_int) -> ::c_int;
        pub fn sendfile(fd: ::c_int,
                        s: ::c_int,
                        offset: ::off_t,
                        len: *mut ::off_t,
                        hdtr: *mut ::sf_hdtr,
                        flags: ::c_int) -> ::c_int;
    }

    cfg_if! {
        if #[cfg(any(target_arch = "arm", target_arch = "x86"))] {
            mod b32;
            pub use self::b32::*;
        } else if #[cfg(any(target_arch = "x86_64", target_arch = "aarch64"))] {
            mod b64;
            pub use self::b64::*;
        } else {
            // unknown arch...
        }
    }

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