diff --git a/src/unix/mlibc/mod.rs b/src/unix/mlibc/mod.rs
new file mode 100644
index 0000000000000..e7785cb1528d8
--- /dev/null
+++ b/src/unix/mlibc/mod.rs
@@ -0,0 +1,652 @@
+cfg_if! {
+    if #[cfg(not(target_arch = "x86_64"))] {
+        compile_error!("Aero is not ported to this architecture");
+    }
+}
+
+// Basic data types
+pub type c_char = i8;
+pub type c_long = i64;
+pub type c_ulong = u64;
+pub type wchar_t = ::c_int;
+
+// options/posix/include/sys/resource.h
+pub type rlim_t = ::c_ulong;
+
+// abis/mlibc/mode_t.h
+pub type mode_t = ::c_int;
+
+// options/posix/include/bits/posix/socklen_t.h
+pub type socklen_t = ::c_ulong;
+
+// options/internal/include/bits/off_t.h
+pub type off_t = ::c_long;
+
+// options/ansi/include/time.h
+pub type clock_t = ::c_ulong;
+
+// options/ansi/include/bits/ansi/clockid_t.h
+pub type clockid_t = ::c_long;
+
+// options/ansi/include/bits/ansi/time_t.h
+pub type time_t = ::c_long;
+
+// options/posix/include/bits/posix/suseconds_t.h
+pub type suseconds_t = ::c_long;
+
+// abis/mlibc/dev_t.h
+pub type dev_t = ::c_ulong;
+
+// options/posix/include/bits/posix/fsblkcnt_t.h
+pub type fsblkcnt_t = ::c_uint;
+
+// options/posix/include/bits/posix/fsfilcnt_t.h
+pub type fsfilcnt_t = ::c_uint;
+
+// abis/mlibc/signal.h
+pub type sigset_t = ::c_long;
+
+// abis/mlibc/termios.h
+pub type cc_t = ::c_uint;
+pub type speed_t = ::c_uint;
+pub type tcflag_t = ::c_uint;
+
+// abis/mlibc/ino_t.h
+pub type ino_t = ::c_long;
+
+// abis/mlibc/blksize_t.h
+pub type blksize_t = ::c_long;
+
+// abis/mlibc/blkcnt_t.h
+pub type blkcnt_t = ::c_long;
+
+// abis/mlibc/nlink_t.h
+pub type nlink_t = ::c_int;
+
+// options/posix/include/bits/posix/in_addr_t.h
+pub type in_addr_t = u32;
+
+// options/posix/include/bits/posix/in_port_t.h
+pub type in_port_t = u16;
+
+// abis/mlibc/socket.h
+pub type sa_family_t = ::c_uint;
+
+// options/linux/include/sys/poll.h
+pub type nfds_t = ::size_t;
+
+// options/posix/include/bits/posix/pthread_t.h
+pub type pthread_t = *mut __mlibc_thread_data;
+
+// options/posix/include/bits/posix/pthread.h
+pub type pthread_key_t = usize; // TODO: This is a big hack
+
+s! {
+    // options/ansi/include/time.h
+    pub struct tm {
+        pub tm_sec: ::c_int,
+        pub tm_min: ::c_int,
+        pub tm_hour: ::c_int,
+        pub tm_mday: ::c_int,
+        pub tm_mon: ::c_int,
+        pub tm_year: ::c_int,
+        pub tm_wday: ::c_int,
+        pub tm_yday: ::c_int,
+        pub tm_isdst: ::c_int,
+        pub tm_gmtoff: ::c_long,
+        pub tm_zone: *const ::c_char,
+    }
+
+    // abis/mlibc/signal.h
+    pub struct siginfo_t {
+        pub si_signo: ::c_int,
+        pub si_code: ::c_int,
+        pub si_errno: ::c_int,
+        pub si_pid: ::pid_t,
+        pub si_uid: ::uid_t,
+        pub si_addr: *mut ::c_void,
+        pub si_status: ::c_int,
+        pub si_value: sigval,
+    }
+    pub struct sigaction {
+        pub sa_handler: ::Option<extern fn(::c_int)>,
+        pub sa_mask: sigset_t,
+        pub sa_flags: ::c_int,
+        pub sa_sigaction: ::Option<extern fn(::c_int, *mut siginfo_t, *mut ::c_void)>,
+    }
+
+    // abis/mlibc/termios.h
+    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 ibaud: speed_t,
+        pub obaud: speed_t,
+    }
+
+    // options/posix/include/sys/statvfs.h
+    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,
+    }
+
+    // options/posix/include/dirent.h
+    pub struct dirent {
+        pub d_ino: ino_t,
+        pub d_off: off_t,
+        pub d_reclen: ::c_ushort,
+        pub d_type: ::c_uchar,
+        pub d_name: [::c_char; 1024],
+    }
+
+    // options/ansi/include/bits/ansi/timespec.h
+    pub struct timespec {
+        pub tv_sec: time_t,
+        pub tv_nsec: ::c_long,
+    }
+
+    // options/posix/include/sys/un.h
+    pub struct sockaddr_un {
+        pub sun_family: sa_family_t,
+        pub sun_path: [::c_char; 108],
+    }
+
+    // abis/mlibc/in.h
+    pub struct in_addr {
+        pub s_addr: in_addr_t,
+    }
+    pub struct ip_mreq {
+        pub imr_multiaddr: in_addr,
+        pub imr_interface: in_addr,
+    }
+    pub struct sockaddr_in {
+        pub sin_family: sa_family_t,
+        pub sin_port: in_port_t,
+        pub sin_addr: in_addr,
+        pub __padding: [u8; 8], // std relies on this being public
+    }
+    pub struct sockaddr_in6 {
+        pub sin6_family: sa_family_t,
+        pub sin6_port: in_port_t,
+        pub sin6_flowinfo: u32,
+        pub sin6_addr: ::in6_addr,
+        pub sin6_scope_id: u32,
+    }
+
+    // options/posix/include/dlfcn.h
+    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,
+    }
+
+    // abis/mlibc/socket.h
+    pub struct sockaddr_storage {
+        pub ss_family: sa_family_t,
+        __padding: [u8; 128 - ::mem::size_of::<sa_family_t>()],
+    }
+
+    // abis/mlibc/stat.h
+    pub struct stat {
+        pub st_dev: ::dev_t,
+        pub st_ino: ::ino_t,
+        pub st_mode: ::mode_t,
+        pub st_nlink: ::nlink_t,
+        pub st_uid: ::uid_t,
+        pub st_gid: ::gid_t,
+        pub st_rdev: ::dev_t,
+        pub st_size: ::off_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_blksize: ::blksize_t,
+        pub st_blocks: ::blkcnt_t,
+    }
+
+    // options/posix/include/pwd.h
+    pub struct passwd {
+        pub pw_name: *mut ::c_char,
+        pub pw_passwd: *mut ::c_char,
+        pub pw_uid: ::uid_t,
+        pub pw_gid: ::gid_t,
+        pub pw_gecos: *mut ::c_char,
+        pub pw_dir: *mut ::c_char,
+        pub pw_shell: *mut ::c_char,
+    }
+
+    // options/posix/include/sys/socket.h
+    pub struct sockaddr {
+        pub sa_family: sa_family_t,
+        pub sa_data: [::c_char; 14],
+    }
+
+    // options/posix/include/bits/posix/pthread_t.h
+    pub struct __mlibc_thread_data {}
+
+    // options/posix/include/bits/posix/pthread.h
+    pub struct pthread_attr_t {
+        pub __mlibc_deatchstate: ::c_int,
+    }
+    pub struct pthread_cond_t {
+        pub __mlibc_seq: ::c_uint,
+    }
+    pub struct pthread_condattr_t {}
+    pub struct pthread_mutex_t {
+        pub __mlibc_state: ::c_uint,
+        pub __mlibc_recursion: ::c_uint,
+        pub __mlibc_flags: ::c_uint,
+    }
+    pub struct pthread_mutexattr_t {
+        pub __mlibc_type: ::c_int,
+        pub __mlibc_robust: ::c_int,
+    }
+    pub struct pthread_rwlock_t {
+        pub __mlibc_m: ::c_uint,
+        pub __mlibc_rc: ::c_uint,
+        __mlibc_padding: ::c_uint,
+    }
+    pub struct pthread_rwlockattr_t {
+        pub __mlibc_align: ::c_int,
+    }
+
+    // options/posix/include/netdb.h
+    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_addr: *mut sockaddr,
+        pub ai_canonname: *mut ::c_char,
+        pub ai_next: *mut addrinfo,
+    }
+
+    // options/ansi/include/locale.h
+    pub struct lconv {
+        pub decimal_point: *mut ::c_char,
+        pub thousands_sep: *mut ::c_char,
+        pub grouping: *mut ::c_char,
+        pub mon_decimal_point: *mut ::c_char,
+        pub mon_thousands_sep: *mut ::c_char,
+        pub mon_grouping: *mut ::c_char,
+        pub positive_sign: *mut ::c_char,
+        pub negative_sign: *mut ::c_char,
+        pub currency_symbol: *mut ::c_char,
+        pub frac_digits: ::c_char,
+        pub p_cs_precedes: ::c_char,
+        pub n_cs_precedes: ::c_char,
+        pub p_sep_by_space: ::c_char,
+        pub n_sep_by_space: ::c_char,
+        pub p_sign_posn: ::c_char,
+        pub n_sign_posn: ::c_char,
+        pub int_curr_symbol: *mut ::c_char,
+        pub int_frac_digits: ::c_char,
+        pub int_p_cs_precedes: ::c_char,
+        pub int_n_cs_precedes: ::c_char,
+        pub int_p_sep_by_space: ::c_char,
+        pub int_n_sep_by_space: ::c_char,
+        pub int_p_sign_posn: ::c_char,
+        pub int_n_sign_posn: ::c_char,
+    }
+
+    // options/posix/include/semaphore.h
+    pub struct sem_t {
+        pub __mlibc_count: ::c_uint,
+    }
+}
+
+// options/posix/include/sys/wait.h
+safe_f! {
+    pub {const} fn WCOREDUMP(x: ::c_int) -> bool {
+        x & WCOREFLAG != 0
+    }
+    pub {const} fn WEXITSTATUS(x: ::c_int) -> ::c_int {
+        x & 0xFF
+    }
+    pub {const} fn WIFCONTINUED(x: ::c_int) -> bool {
+        x & 0x100 != 0
+    }
+    pub {const} fn WIFEXITED(x: ::c_int) -> bool {
+        x & 0x200 != 0
+    }
+    pub {const} fn WIFSIGNALED(x: ::c_int) -> bool {
+        x & 0x400 != 0
+    }
+    pub {const} fn WIFSTOPPED(x: ::c_int) -> bool {
+        x & 0x800 != 0
+    }
+    pub {const} fn WSTOPSIG(x: ::c_int) -> ::c_int {
+        (x & 0xFF_0000) >> 16
+    }
+    pub {const} fn WTERMSIG(x: ::c_int) -> ::c_int {
+        (x & 0xFF00_0000) >> 24
+    }
+}
+
+s_no_extra_traits! {
+    // options/posix/include/bits/posix/fd_set.h
+    pub union fd_set {
+        pub __mlibc_elems: [c_char; 128],
+        pub fds_bits: [c_char; 128],
+    }
+
+     // abis/mlibc/signal.h
+     pub union sigval {
+        pub sival_int: ::c_int,
+        pub sival_ptr: *mut ::c_void,
+    }
+}
+
+// abis/mlibc/vm-flags.h
+pub const MAP_ANON: ::c_int = 8;
+pub const MAP_PRIVATE: ::c_int = 1;
+pub const MAP_SHARED: ::c_int = 2;
+pub const PROT_EXEC: ::c_int = 4;
+pub const PROT_READ: ::c_int = 1;
+pub const PROT_WRITE: ::c_int = 2;
+
+// options/posix/include/sys/mman.h
+pub const MAP_FAILED: *mut ::c_void = usize::MAX as *mut ::c_void;
+pub const MS_ASYNC: ::c_int = 1;
+pub const MS_SYNC: ::c_int = 2;
+
+// options/ansi/include/time.h
+pub const CLOCK_MONOTONIC: clockid_t = 1;
+pub const CLOCK_REALTIME: clockid_t = 0;
+
+// options/posix/include/netdb.h
+pub const EAI_SYSTEM: ::c_int = 9;
+
+// abis/mlibc/in.h
+pub const IPV6_ADD_MEMBERSHIP: ::c_int = 1;
+pub const IPV6_DROP_MEMBERSHIP: ::c_int = 2;
+pub const IPV6_MULTICAST_LOOP: ::c_int = 5;
+pub const IPV6_V6ONLY: ::c_int = 7;
+pub const IP_ADD_MEMBERSHIP: ::c_int = 35;
+pub const IP_DROP_MEMBERSHIP: ::c_int = 36;
+pub const IP_MULTICAST_LOOP: ::c_int = 34;
+pub const IP_MULTICAST_TTL: ::c_int = 33;
+pub const IP_TTL: ::c_int = 2;
+
+// abis/mlibc/signal.h
+pub const SIGKILL: ::c_int = 9;
+pub const SIGPIPE: ::c_int = 13;
+pub const SIG_SETMASK: ::c_int = 3;
+
+// abis/mlibc/termios.h
+pub const NCCS: usize = 11;
+
+// options/posix/include/termios.h
+pub const TIOCGWINSZ: ::c_ulong = 0x5413;
+
+// options/ansi/include/stdlib.h
+pub const EXIT_FAILURE: ::c_int = 1;
+pub const EXIT_SUCCESS: ::c_int = 0;
+
+// options/posix/include/dlfcn.h
+pub const RTLD_DEFAULT: *mut ::c_void = 0 as *mut ::c_void;
+
+// options/posix/include/unistd.h
+pub const STDERR_FILENO: ::c_int = 2;
+pub const STDIN_FILENO: ::c_int = 0;
+pub const STDOUT_FILENO: ::c_int = 1;
+pub const _SC_GETPW_R_SIZE_MAX: ::c_int = 1;
+pub const _SC_NPROCESSORS_ONLN: ::c_int = 6;
+pub const _SC_PAGESIZE: ::c_int = _SC_PAGE_SIZE;
+pub const _SC_PAGE_SIZE: ::c_int = 3;
+
+// abis/mlibc/socket.h
+pub const AF_INET6: ::c_int = PF_INET6;
+pub const AF_INET: ::c_int = PF_INET;
+pub const AF_UNIX: ::c_int = 3;
+pub const MSG_PEEK: ::c_int = 0x20;
+pub const PF_INET6: ::c_int = 2;
+pub const PF_INET: ::c_int = 1;
+pub const PF_UNIX: ::c_int = 3;
+pub const SHUT_RD: ::c_int = 1;
+pub const SHUT_RDWR: ::c_int = 2;
+pub const SHUT_WR: ::c_int = 3;
+pub const SOCK_DGRAM: ::c_int = 1;
+pub const SOCK_STREAM: ::c_int = 4;
+pub const SOL_SOCKET: ::c_int = 1;
+pub const SO_BROADCAST: ::c_int = 6;
+pub const SO_LINGER: ::c_int = 7;
+pub const SO_ERROR: ::c_int = 5;
+pub const SO_RCVTIMEO: ::c_int = 11;
+pub const SO_REUSEADDR: ::c_int = 12;
+pub const SO_SNDTIMEO: ::c_int = 15;
+
+// abis/mlibc/errno.h
+pub const EDOM: ::c_int = 1;
+pub const EILSEQ: ::c_int = 2;
+pub const ERANGE: ::c_int = 3;
+pub const E2BIG: ::c_int = 1001;
+pub const EACCES: ::c_int = 1002;
+pub const EADDRINUSE: ::c_int = 1003;
+pub const EADDRNOTAVAIL: ::c_int = 1004;
+pub const EAFNOSUPPORT: ::c_int = 1005;
+pub const EAGAIN: ::c_int = 1006;
+pub const EALREADY: ::c_int = 1007;
+pub const EBADF: ::c_int = 1008;
+pub const EBADMSG: ::c_int = 1009;
+pub const EBUSY: ::c_int = 1010;
+pub const ECANCELED: ::c_int = 1011;
+pub const ECHILD: ::c_int = 1012;
+pub const ECONNABORTED: ::c_int = 1013;
+pub const ECONNREFUSED: ::c_int = 1014;
+pub const ECONNRESET: ::c_int = 1015;
+pub const EDEADLK: ::c_int = 1016;
+pub const EDESTADDRREQ: ::c_int = 1017;
+pub const EDQUOT: ::c_int = 1018;
+pub const EEXIST: ::c_int = 1019;
+pub const EFAULT: ::c_int = 1020;
+pub const EFBIG: ::c_int = 1021;
+pub const EHOSTUNREACH: ::c_int = 1022;
+pub const EIDRM: ::c_int = 1023;
+pub const EINPROGRESS: ::c_int = 1024;
+pub const EINTR: ::c_int = 1025;
+pub const EINVAL: ::c_int = 1026;
+pub const EIO: ::c_int = 1027;
+pub const EISCONN: ::c_int = 1028;
+pub const EISDIR: ::c_int = 1029;
+pub const ELOOP: ::c_int = 1030;
+pub const EMFILE: ::c_int = 1031;
+pub const EMLINK: ::c_int = 1032;
+pub const EMSGSIZE: ::c_int = 1034;
+pub const EMULTIHOP: ::c_int = 1035;
+pub const ENAMETOOLONG: ::c_int = 1036;
+pub const ENETDOWN: ::c_int = 1037;
+pub const ENETRESET: ::c_int = 1038;
+pub const ENETUNREACH: ::c_int = 1039;
+pub const ENFILE: ::c_int = 1040;
+pub const ENOBUFS: ::c_int = 1041;
+pub const ENODEV: ::c_int = 1042;
+pub const ENOENT: ::c_int = 1043;
+pub const ENOEXEC: ::c_int = 1044;
+pub const ENOLCK: ::c_int = 1045;
+pub const ENOLINK: ::c_int = 1046;
+pub const ENOMEM: ::c_int = 1047;
+pub const ENOMSG: ::c_int = 1048;
+pub const ENOPROTOOPT: ::c_int = 1049;
+pub const ENOSPC: ::c_int = 1050;
+pub const ENOSYS: ::c_int = 1051;
+pub const ENOTCONN: ::c_int = 1052;
+pub const ENOTDIR: ::c_int = 1053;
+pub const ENOTEMPTY: ::c_int = 1054;
+pub const ENOTRECOVERABLE: ::c_int = 1055;
+pub const ENOTSOCK: ::c_int = 1056;
+pub const ENOTSUP: ::c_int = 1057;
+pub const ENOTTY: ::c_int = 1058;
+pub const ENXIO: ::c_int = 1059;
+pub const EOPNOTSUPP: ::c_int = 1060;
+pub const EOVERFLOW: ::c_int = 1061;
+pub const EOWNERDEAD: ::c_int = 1062;
+pub const EPERM: ::c_int = 1063;
+pub const EPIPE: ::c_int = 1064;
+pub const EPROTO: ::c_int = 1065;
+pub const EPROTONOSUPPORT: ::c_int = 1066;
+pub const EPROTOTYPE: ::c_int = 1067;
+pub const EROFS: ::c_int = 1068;
+pub const ESPIPE: ::c_int = 1069;
+pub const ESRCH: ::c_int = 1070;
+pub const ESTALE: ::c_int = 1071;
+pub const ETIMEDOUT: ::c_int = 1072;
+pub const ETXTBSY: ::c_int = 1073;
+pub const EWOULDBLOCK: ::c_int = EAGAIN;
+pub const EXDEV: ::c_int = 1075;
+pub const ENODATA: ::c_int = 1076;
+pub const ETIME: ::c_int = 1077;
+pub const ENOKEY: ::c_int = 1078;
+pub const ESHUTDOWN: ::c_int = 1079;
+pub const EHOSTDOWN: ::c_int = 1080;
+pub const EBADFD: ::c_int = 1081;
+pub const ENOMEDIUM: ::c_int = 1082;
+pub const ENOTBLK: ::c_int = 1083;
+
+// options/posix/include/fcntl.h
+pub const AT_FDCWD: ::c_int = -100;
+pub const F_DUPFD_CLOEXEC: ::c_int = 2;
+pub const F_GETFL: ::c_int = 5;
+pub const F_SETFL: ::c_int = 6;
+pub const O_ACCMODE: ::c_int = 7;
+pub const O_APPEND: ::c_int = 8;
+pub const O_CLOEXEC: ::c_int = 0x4000;
+pub const O_CREAT: ::c_int = 0x10;
+pub const O_EXCL: ::c_int = 0x40;
+pub const O_NONBLOCK: ::c_int = 0x400;
+pub const O_RDONLY: ::c_int = 2;
+pub const O_RDWR: ::c_int = 3;
+pub const O_TRUNC: ::c_int = 0x200;
+pub const O_WRONLY: ::c_int = 5;
+
+// options/mlibc/seek-whence.h
+pub const SEEK_CUR: ::c_int = 1;
+pub const SEEK_END: ::c_int = 2;
+pub const SEEK_SET: ::c_int = 3;
+
+// options/posix/include/netinet/tcp.h
+pub const TCP_NODELAY: ::c_int = 1;
+
+// abis/mlibc/stat.h
+pub const S_IFBLK: mode_t = 0x6000;
+pub const S_IFCHR: mode_t = 0x2000;
+pub const S_IFDIR: mode_t = 0x4000;
+pub const S_IFIFO: mode_t = 0x1000;
+pub const S_IFLNK: mode_t = 0xA000;
+pub const S_IFMT: mode_t = 0xF000;
+pub const S_IFREG: mode_t = 0x8000;
+pub const S_IFSOCK: mode_t = 0xC000;
+pub const S_IRGRP: mode_t = 0o40;
+pub const S_IROTH: mode_t = 0o4;
+pub const S_IRUSR: mode_t = 0o400;
+pub const S_IRWXG: mode_t = 0o70;
+pub const S_IRWXO: mode_t = 0o7;
+pub const S_IRWXU: mode_t = 0o700;
+pub const S_IWGRP: mode_t = 0o20;
+pub const S_IWOTH: mode_t = 0o2;
+pub const S_IWUSR: mode_t = 0o200;
+pub const S_IXGRP: mode_t = 0o10;
+pub const S_IXOTH: mode_t = 0o1;
+pub const S_IXUSR: mode_t = 0o100;
+
+// options/posix/include/sys/wait.h
+pub const WCOREFLAG: ::c_int = 0x80;
+pub const WNOHANG: ::c_int = 2;
+
+// options/linux/include/sys/poll.h
+// TODO: Port epoll!
+pub const POLLHUP: ::c_short = 8;
+pub const POLLIN: ::c_short = 1;
+pub const POLLNVAL: ::c_short = 0x40;
+pub const POLLOUT: ::c_short = 2;
+
+// options/glibc/include/sys/ioctl.h
+pub const FIOCLEX: ::c_ulong = 0x5451;
+pub const FIONBIO: ::c_ulong = 0x5421;
+
+// options/ansi/include/limits.h
+pub const PTHREAD_STACK_MIN: ::size_t = 16384;
+
+extern "C" {
+    pub fn bind(socket: ::c_int, address: *const ::sockaddr, address_len: ::socklen_t) -> ::c_int;
+    pub fn clock_gettime(clk_id: clockid_t, tp: *mut ::timespec) -> ::c_int;
+    pub fn clock_settime(clk_id: clockid_t, tp: *const ::timespec) -> ::c_int;
+    pub fn endpwent();
+    pub fn getpwent() -> *mut passwd;
+    pub fn getgrgid_r(
+        gid: ::gid_t,
+        grp: *mut ::group,
+        buf: *mut ::c_char,
+        buflen: ::size_t,
+        result: *mut *mut ::group,
+    ) -> ::c_int;
+    pub fn getgrnam_r(
+        name: *const ::c_char,
+        grp: *mut ::group,
+        buf: *mut ::c_char,
+        buflen: ::size_t,
+        result: *mut *mut ::group,
+    ) -> ::c_int;
+    pub fn getgrouplist(
+        user: *const ::c_char,
+        group: ::gid_t,
+        groups: *mut ::gid_t,
+        ngroups: *mut ::c_int,
+    ) -> ::c_int;
+    pub fn getpwnam_r(
+        name: *const ::c_char,
+        pwd: *mut passwd,
+        buf: *mut ::c_char,
+        buflen: ::size_t,
+        result: *mut *mut passwd,
+    ) -> ::c_int;
+    pub fn getpwuid_r(
+        uid: ::uid_t,
+        pwd: *mut passwd,
+        buf: *mut ::c_char,
+        buflen: ::size_t,
+        result: *mut *mut passwd,
+    ) -> ::c_int;
+    pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
+    pub fn mprotect(addr: *mut ::c_void, len: ::size_t, prot: ::c_int) -> ::c_int;
+    pub fn msync(addr: *mut ::c_void, len: ::size_t, flags: ::c_int) -> ::c_int;
+    pub fn pthread_condattr_setclock(
+        attr: *mut pthread_condattr_t,
+        clock_id: ::clockid_t,
+    ) -> ::c_int;
+    pub fn pthread_create(
+        thread: *mut ::pthread_t,
+        attr: *const ::pthread_attr_t,
+        f: extern "C" fn(*mut ::c_void) -> *mut ::c_void,
+        value: *mut ::c_void,
+    ) -> ::c_int;
+    pub fn pthread_setname_np(t: ::pthread_t, name: *const ::c_char) -> ::c_int;
+    pub fn pthread_sigmask(how: ::c_int, set: *const sigset_t, oldset: *mut sigset_t) -> ::c_int;
+    pub fn readv(fd: ::c_int, iov: *const ::iovec, count: ::c_int) -> ::ssize_t;
+    pub fn recvfrom(
+        socket: ::c_int,
+        buf: *mut ::c_void,
+        len: ::size_t,
+        flags: ::c_int,
+        addr: *mut ::sockaddr,
+        addrlen: *mut ::socklen_t,
+    ) -> ::ssize_t;
+    pub fn setgroups(ngroups: ::c_int, ptr: *const ::gid_t) -> ::c_int;
+    pub fn setpwent();
+    pub fn writev(fd: ::c_int, iov: *const ::iovec, count: ::c_int) -> ::ssize_t;
+}
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 5ff2294e797c3..afaaa7ce0ea45 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -1475,6 +1475,9 @@ cfg_if! {
     } else if #[cfg(target_os = "redox")] {
         mod redox;
         pub use self::redox::*;
+    } else if #[cfg(target_os = "aero")] {
+        mod mlibc;
+        pub use self::mlibc::*;
     } else {
         // Unknown target_os
     }