Add support for Haiku x86 and x86_64

* Rework of original patches from Niels Sascha Reedijk
  that include style and build fixes for libc master

8 files changed, 734 insertions, 2 deletions

diff --git a/README.md b/README.md
index 09b9a567b4..5ea812320f 100644
--- a/README.md
+++ b/README.md
@@ -132,4 +132,6 @@ The following may be supported, but are not guaranteed to always work:
   * `i686-unknown-freebsd`
   * [`x86_64-unknown-bitrig`](https://doc.rust-lang.org/libc/x86_64-unknown-bitrig/libc/)
   * [`x86_64-unknown-dragonfly`](https://doc.rust-lang.org/libc/x86_64-unknown-dragonfly/libc/)
+  * `i686-unknown-haiku`
+  * `x86_64-unknown-haiku`
   * [`x86_64-unknown-netbsd`](https://doc.rust-lang.org/libc/x86_64-unknown-netbsd/libc/)
diff --git a/src/unix/bsd/mod.rs b/src/unix/bsd/mod.rs
index d244cd6cbd..0616cd3518 100644
--- a/src/unix/bsd/mod.rs
+++ b/src/unix/bsd/mod.rs
@@ -321,6 +321,8 @@ f! {
 }
 
 extern {
+    pub fn getifaddrs(ifap: *mut *mut ::ifaddrs) -> ::c_int;
+    pub fn freeifaddrs(ifa: *mut ::ifaddrs);
     pub fn setgroups(ngroups: ::c_int,
                      ptr: *const ::gid_t) -> ::c_int;
     pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
diff --git a/src/unix/haiku/b32.rs b/src/unix/haiku/b32.rs
new file mode 100644
index 0000000000..129bd0b9fa
--- /dev/null
+++ b/src/unix/haiku/b32.rs
@@ -0,0 +1,5 @@
+pub type c_long = i32;
+pub type c_ulong = u32;
+
+// intentionally not public, only used for fd_set
+const ULONG_SIZE: usize = 32;
diff --git a/src/unix/haiku/b64.rs b/src/unix/haiku/b64.rs
new file mode 100644
index 0000000000..a5dbbc7b85
--- /dev/null
+++ b/src/unix/haiku/b64.rs
@@ -0,0 +1,5 @@
+pub type c_ulong = u64;
+pub type c_long = i64;
+
+// intentionally not public, only used for fd_set
+const ULONG_SIZE: usize = 64;
diff --git a/src/unix/haiku/mod.rs b/src/unix/haiku/mod.rs
new file mode 100644
index 0000000000..b209b709b8
--- /dev/null
+++ b/src/unix/haiku/mod.rs
@@ -0,0 +1,708 @@
+use dox::mem;
+
+pub type rlim_t = ::uintptr_t;
+pub type sa_family_t = u8;
+pub type pthread_key_t = ::c_int;
+pub type nfds_t = ::c_long;
+pub type tcflag_t = ::c_uint;
+pub type speed_t = ::c_uint;
+pub type c_char = i8;
+pub type clock_t = i32;
+pub type time_t = i32;
+pub type suseconds_t = i32;
+pub type wchar_t = i32;
+pub type off_t = i64;
+pub type ino_t = i64;
+pub type blkcnt_t = i64;
+pub type blksize_t = i32;
+pub type dev_t = i32;
+pub type mode_t = u32;
+pub type nlink_t = i32;
+pub type useconds_t = u32;
+pub type socklen_t = u32;
+pub type pthread_t = ::uintptr_t;
+pub type pthread_mutexattr_t = ::uintptr_t;
+pub type sigset_t = u64;
+pub type fsblkcnt_t = i64;
+pub type fsfilcnt_t = i64;
+pub type pthread_attr_t = *mut ::c_void;
+
+pub enum timezone {}
+
+s! {
+    pub struct sockaddr {
+        pub sa_len: u8,
+        pub sa_family: sa_family_t,
+        pub sa_data: [::c_char; 30],
+    }
+
+    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: [u8; 24],
+    }
+
+    pub struct sockaddr_in6 {
+        pub sin6_len: u8,
+        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,
+    }
+
+    pub struct sockaddr_un {
+        pub sun_len: u8,
+        pub sun_family: sa_family_t,
+        pub sun_path: [::c_char; 126]
+    }
+
+    pub struct sockaddr_storage {
+        pub ss_len: u8,
+        pub ss_family: sa_family_t,
+        __ss_pad1: [u8; 6],
+        __ss_pad2: u64,
+        __ss_pad3: [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 fd_set {
+        fds_bits: [c_ulong; FD_SETSIZE / ULONG_SIZE],
+    }
+
+    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,
+    }
+
+    pub struct utsname {
+        pub sysname: [::c_char; 32],
+        pub nodename: [::c_char; 32],
+        pub release: [::c_char; 32],
+        pub version: [::c_char; 32],
+        pub machine: [::c_char; 32],
+    }
+
+    pub struct lconv {
+        pub decimal_point: *mut ::c_char,
+        pub thousands_sep: *mut ::c_char,
+        pub grouping: *mut ::c_char,
+        pub int_curr_symbol: *mut ::c_char,
+        pub currency_symbol: *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 int_frac_digits: ::c_char,
+        pub frac_digits: ::c_char,
+        pub p_cs_precedes: ::c_char,
+        pub p_sep_by_space: ::c_char,
+        pub n_cs_precedes: ::c_char,
+        pub n_sep_by_space: ::c_char,
+        pub p_sign_posn: ::c_char,
+        pub n_sign_posn: ::c_char,
+        pub int_p_cs_precedes: ::c_char,
+        pub int_p_sep_by_space: ::c_char,
+        pub int_n_cs_precedes: ::c_char,
+        pub int_n_sep_by_space: ::c_char,
+        pub int_p_sign_posn: ::c_char,
+        pub int_n_sign_posn: ::c_char,
+    }
+
+    pub struct msghdr {
+        pub msg_name: *mut ::c_void,
+        pub msg_namelen: ::socklen_t,
+        pub msg_iov: *mut ::iovec,
+        pub msg_iovlen: ::c_int,
+        pub msg_control: *mut ::c_void,
+        pub msg_controllen: ::socklen_t,
+        pub msg_flags: ::c_int,
+    }
+
+    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 termios {
+        pub c_iflag: ::tcflag_t,
+        pub c_oflag: ::tcflag_t,
+        pub c_cflag: ::tcflag_t,
+        pub c_lflag: ::tcflag_t,
+        pub c_line:  ::c_char,
+        pub c_ispeed: ::speed_t,
+        pub c_ospeed: ::speed_t,
+        pub c_cc: [::cc_t; ::NCCS],
+    }
+
+    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_size: off_t,
+        pub st_rdev: dev_t,
+        pub st_blksize: blksize_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_crtime: time_t,
+        pub st_crtime_nsec: c_long,
+        pub st_type: u32,
+        pub st_blocks: blkcnt_t,
+    }
+
+    pub struct dirent {
+        pub d_dev: dev_t,
+        pub d_pdev: dev_t,
+        pub d_ino: ino_t,
+        pub d_pino: i64,
+        pub d_reclen: ::c_ushort,
+        pub d_name: [::c_char; 1024], // Max length is _POSIX_PATH_MAX
+    }
+
+    pub struct glob_t {
+        pub gl_pathc: ::size_t,
+        __unused1: ::size_t,
+        pub gl_offs: ::size_t,
+        __unused2: ::size_t,
+        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 pthread_mutex_t {
+        flags: u32,
+        lock: i32,
+        unused: i32,
+        owner: i32,
+        owner_count: i32,
+    }
+
+    pub struct pthread_cond_t {
+        flags: u32,
+        unused: i32,
+        mutex: *mut ::c_void,
+        waiter_count: i32,
+        lock: i32,
+    }
+
+    pub struct pthread_rwlock_t {
+        flags: u32,
+        owner: i32,
+        lock_sem: i32,      // this is actually a union
+        lock_count: i32,
+        reader_count: i32,
+        writer_count: i32,
+        waiters: [*mut ::c_void; 2],
+    }
+
+    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_dir: *mut ::c_char,
+        pub pw_shell: *mut ::c_char,
+        pub pw_gecos: *mut ::c_char,
+    }
+
+    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 stack_t {
+        pub ss_sp: *mut ::c_void,
+        pub ss_size: ::size_t,
+        pub ss_flags: ::c_int,
+    }
+
+    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_band: c_long,
+        pub sigval: *mut ::c_void,
+    }
+
+    pub struct sigaction {
+        pub sa_sigaction: ::sighandler_t,
+        pub sa_mask: ::sigset_t,
+        pub sa_flags: ::c_int,
+        sa_userdata: *mut ::c_void,
+    }
+}
+
+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 F_DUPFD: ::c_int = 0x0001;
+pub const F_GETFD: ::c_int = 0x0002;
+pub const F_SETFD: ::c_int = 0x0004;
+pub const F_GETFL: ::c_int = 0x0008;
+pub const F_SETFL: ::c_int = 0x0010;
+
+pub const SIGTRAP: ::c_int = 22;
+
+pub const PTHREAD_CREATE_JOINABLE: ::c_int = 0;
+pub const PTHREAD_CREATE_DETACHED: ::c_int = 1;
+
+pub const CLOCK_REALTIME: ::c_int = -1;
+pub const CLOCK_MONOTONIC: ::c_int = 0;
+
+pub const RLIMIT_CORE: ::c_int = 0;
+pub const RLIMIT_CPU: ::c_int = 1;
+pub const RLIMIT_DATA: ::c_int = 2;
+pub const RLIMIT_FSIZE: ::c_int = 3;
+pub const RLIMIT_NOFILE: ::c_int = 4;
+pub const RLIMIT_AS: ::c_int = 6;
+// Haiku specific
+pub const RLIMIT_NOVMON: ::c_int = 7;
+pub const RLIMIT_NLIMITS: ::c_int = 8;
+
+pub const RUSAGE_SELF: ::c_int = 0;
+
+pub const NCCS: usize = 11;
+
+pub const O_RDONLY: ::c_int = 0x0000;
+pub const O_WRONLY: ::c_int = 0x0001;
+pub const O_RDWR: ::c_int = 0x0002;
+pub const O_ACCMODE: ::c_int = 0x0003;
+
+pub const O_EXCL: ::c_int = 0x0100;
+pub const O_CREAT: ::c_int = 0x0200;
+pub const O_TRUNC: ::c_int = 0x0400;
+pub const O_NOCTTY: ::c_int = 0x1000;
+pub const O_NOTRAVERSE: ::c_int = 0x2000;
+
+pub const O_CLOEXEC: ::c_int = 0x00000040;
+pub const O_NONBLOCK: ::c_int = 0x00000080;
+pub const O_APPEND: ::c_int = 0x00000800;
+pub const O_SYNC: ::c_int = 0x00010000;
+pub const O_RSYNC: ::c_int = 0x00020000;
+pub const O_DSYNC: ::c_int = 0x00040000;
+pub const O_NOFOLLOW: ::c_int = 0x00080000;
+pub const O_NOCACHE: ::c_int = 0x00100000;
+pub const O_DIRECTORY: ::c_int = 0x00200000;
+
+pub const S_IFIFO: ::mode_t = 61440;
+pub const S_IFCHR: ::mode_t = 49152;
+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_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 = 70;
+pub const S_IXGRP: ::mode_t = 10;
+pub const S_IWGRP: ::mode_t = 20;
+pub const S_IRGRP: ::mode_t = 40;
+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 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 = 7;
+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 LC_ALL: ::c_int = 0;
+pub const LC_COLLATE: ::c_int = 1;
+pub const LC_CTYPE: ::c_int = 2;
+pub const LC_MONETARY: ::c_int = 3;
+pub const LC_NUMERIC: ::c_int = 4;
+pub const LC_TIME: ::c_int = 5;
+pub const LC_MESSAGES: ::c_int = 6;
+
+// TODO: Haiku does not have MAP_FILE, but libstd/os.rs requires it
+pub const MAP_FILE: ::c_int = 0x00;
+pub const MAP_SHARED: ::c_int = 0x01;
+pub const MAP_PRIVATE: ::c_int = 0x02;
+pub const MAP_FIXED: ::c_int = 0x004;
+
+pub const MAP_FAILED: *mut ::c_void = !0 as *mut ::c_void;
+
+pub const MS_ASYNC: ::c_int = 0x01;
+pub const MS_INVALIDATE: ::c_int = 0x04;
+pub const MS_SYNC: ::c_int = 0x02;
+
+pub const EPERM : ::c_int = -2147483633;
+pub const ENOENT : ::c_int = -2147459069;
+pub const ESRCH : ::c_int = -2147454963;
+pub const EINTR : ::c_int = -2147483638;
+pub const EIO : ::c_int = -2147483647;
+pub const ENXIO : ::c_int = -2147454965;
+pub const E2BIG : ::c_int = -2147454975;
+pub const ENOEXEC : ::c_int = -2147478782;
+pub const EBADF : ::c_int = -2147459072;
+pub const ECHILD : ::c_int = -2147454974;
+pub const EDEADLK : ::c_int = -2147454973;
+pub const ENOMEM : ::c_int = -2147454976;
+pub const EACCES : ::c_int = -2147483646;
+pub const EFAULT : ::c_int = -2147478783;
+// pub const ENOTBLK : ::c_int = 15;
+pub const EBUSY : ::c_int = -2147483634;
+pub const EEXIST : ::c_int = -2147459070;
+pub const EXDEV : ::c_int = -2147459061;
+pub const ENODEV : ::c_int = -2147454969;
+pub const ENOTDIR : ::c_int = -2147459067;
+pub const EISDIR : ::c_int = -2147459063;
+pub const EINVAL : ::c_int = -2147483643;
+pub const ENFILE : ::c_int = -2147454970;
+pub const EMFILE : ::c_int = -2147459062;
+pub const ENOTTY : ::c_int = -2147454966;
+pub const ETXTBSY : ::c_int = -2147454917;
+pub const EFBIG : ::c_int = -2147454972;
+pub const ENOSPC : ::c_int = -2147459065;
+pub const ESPIPE : ::c_int = -2147454964;
+pub const EROFS : ::c_int = -2147459064;
+pub const EMLINK : ::c_int = -2147454971;
+pub const EPIPE : ::c_int = -2147459059;
+pub const EDOM : ::c_int = -2147454960;
+pub const ERANGE : ::c_int = -2147454959;
+pub const EAGAIN : ::c_int = -2147483637;
+pub const EWOULDBLOCK : ::c_int = -2147483637;
+
+pub const EINPROGRESS : ::c_int = -2147454940;
+pub const EALREADY : ::c_int = -2147454939;
+pub const ENOTSOCK : ::c_int = -2147454932;
+pub const EDESTADDRREQ : ::c_int = -2147454928;
+pub const EMSGSIZE : ::c_int = -2147454934;
+pub const EPROTOTYPE : ::c_int = -2147454958;
+pub const ENOPROTOOPT : ::c_int = -2147454942;
+pub const EPROTONOSUPPORT : ::c_int = -2147454957;
+pub const EOPNOTSUPP : ::c_int = -2147454933;
+pub const EPFNOSUPPORT : ::c_int = -2147454956;
+pub const EAFNOSUPPORT : ::c_int = -2147454955;
+pub const EADDRINUSE : ::c_int = -2147454954;
+pub const EADDRNOTAVAIL : ::c_int = -2147454953;
+pub const ENETDOWN : ::c_int = -2147454953;
+pub const ENETUNREACH : ::c_int = -2147454951;
+pub const ENETRESET : ::c_int = -2147454950;
+pub const ECONNABORTED : ::c_int = -2147454949;
+pub const ECONNRESET : ::c_int = -2147454948;
+pub const ENOBUFS : ::c_int = -2147454941;
+pub const EISCONN : ::c_int = -2147454947;
+pub const ENOTCONN : ::c_int = -2147454946;
+pub const ESHUTDOWN : ::c_int = -2147454945;
+pub const ETIMEDOUT : ::c_int = -2147483639;
+pub const ECONNREFUSED : ::c_int = -2147454944;
+pub const ELOOP : ::c_int = -2147459060;
+pub const ENAMETOOLONG : ::c_int = -2147459068;
+pub const EHOSTDOWN : ::c_int = -2147454931;
+pub const EHOSTUNREACH : ::c_int = -2147454943;
+pub const ENOTEMPTY : ::c_int = -2147459066;
+pub const EDQUOT : ::c_int = -2147454927;
+pub const ESTALE : ::c_int = -2147454936;
+pub const ENOLCK : ::c_int = -2147454968;
+pub const ENOSYS : ::c_int = -2147454967;
+pub const EIDRM : ::c_int = -2147454926;
+pub const ENOMSG : ::c_int = -2147454937;
+pub const EOVERFLOW : ::c_int = -2147454935;
+pub const ECANCELED : ::c_int = -2147454929;
+pub const EILSEQ : ::c_int = -2147454938;
+pub const ENOATTR : ::c_int = -2147454916;
+pub const EBADMSG : ::c_int = -2147454930;
+pub const EMULTIHOP : ::c_int = -2147454925;
+pub const ENOLINK : ::c_int = -2147454923;
+pub const EPROTO : ::c_int = -2147454919;
+
+pub const IPPROTO_RAW: ::c_int = 255;
+
+// These are prefixed with POSIX_ on Haiku
+pub const MADV_NORMAL: ::c_int = 1;
+pub const MADV_SEQUENTIAL: ::c_int = 2;
+pub const MADV_RANDOM: ::c_int = 3;
+pub const MADV_WILLNEED: ::c_int = 4;
+pub const MADV_DONTNEED: ::c_int = 5;
+
+pub const IFF_LOOPBACK: ::c_int = 0x0008;
+
+pub const AF_UNIX: ::c_int = 9;
+pub const AF_INET: ::c_int = 1;
+pub const AF_INET6: ::c_int = 6;
+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 TCP_NODELAY: ::c_int = 0x01;
+pub const TCP_MAXSEG: ::c_int = 0x02;
+pub const TCP_NOPUSH: ::c_int = 0x04;
+pub const TCP_NOOPT: ::c_int = 0x08;
+
+pub const IPV6_MULTICAST_LOOP: ::c_int = 26;
+pub const IPV6_JOIN_GROUP: ::c_int = 28;
+pub const IPV6_LEAVE_GROUP: ::c_int = 29;
+pub const IPV6_V6ONLY: ::c_int = 30;
+
+pub const SO_DEBUG: ::c_int = 0x00000004;
+
+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 = 0x01;
+pub const LOCK_EX: ::c_int = 0x02;
+pub const LOCK_NB: ::c_int = 0x04;
+pub const LOCK_UN: ::c_int = 0x08;
+
+pub const SIGSTKSZ: ::size_t = 16384;
+
+pub const SA_NODEFER: ::c_int = 0x08;
+pub const SA_RESETHAND: ::c_int = 0x04;
+pub const SA_RESTART: ::c_int = 0x10;
+pub const SA_NOCLDSTOP: ::c_int = 0x01;
+
+pub const FD_SETSIZE: usize = 1024;
+
+pub const RTLD_NOW: ::c_int = 0x1;
+pub const RTLD_DEFAULT: *mut ::c_void = 0isize as *mut ::c_void;
+
+pub const BUFSIZ: ::c_uint = 8192;
+pub const FILENAME_MAX: ::c_uint = 256;
+pub const FOPEN_MAX: ::c_uint = 128;
+pub const L_tmpnam: ::c_uint = 512;
+pub const TMP_MAX: ::c_uint = 32768;
+pub const _PC_NAME_MAX: ::c_int = 4;
+
+pub const FIONBIO: ::c_int = 0xbe000000;
+
+pub const _SC_IOV_MAX : ::c_int = 32;
+pub const _SC_GETGR_R_SIZE_MAX : ::c_int = 25;
+pub const _SC_GETPW_R_SIZE_MAX : ::c_int = 26;
+pub const _SC_PAGESIZE : ::c_int = 27;
+pub const _SC_THREAD_ATTR_STACKADDR : ::c_int = 48;
+pub const _SC_THREAD_ATTR_STACKSIZE : ::c_int = 49;
+pub const _SC_THREAD_PRIORITY_SCHEDULING : ::c_int = 50;
+pub const _SC_THREAD_PROCESS_SHARED : ::c_int = 46;
+pub const _SC_THREAD_STACK_MIN : ::c_int = 47;
+pub const _SC_THREADS : ::c_int = 31;
+pub const _SC_ATEXIT_MAX : ::c_int = 37;
+
+pub const PTHREAD_STACK_MIN: ::size_t = 8192;
+
+pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t = pthread_mutex_t {
+    flags: 0,
+    lock: 0,
+    unused: -42,
+    owner: -1,
+    owner_count: 0,
+};
+pub const PTHREAD_COND_INITIALIZER: pthread_cond_t = pthread_cond_t {
+    flags: 0,
+    unused: -42,
+    mutex: 0 as *mut _,
+    waiter_count: 0,
+    lock: 0,
+};
+pub const PTHREAD_RWLOCK_INITIALIZER: pthread_rwlock_t = pthread_rwlock_t {
+    flags: 0,
+    owner: 0,
+    lock_sem: 0,
+    lock_count: 0,
+    reader_count: 0,
+    writer_count: 0,
+    waiters: [0 as *mut _; 2],
+};
+
+pub const PTHREAD_MUTEX_RECURSIVE: ::c_int = 3;
+
+pub const FIOCLEX: c_ulong = 0; // TODO: does not exist on Haiku!
+
+pub const SA_ONSTACK: c_ulong = 0x20;
+pub const SA_SIGINFO: c_ulong = 0x40;
+pub const SA_NOCLDWAIT: c_ulong = 0x02;
+
+pub const SIGCHLD: ::c_int = 5;
+pub const SIGBUS: ::c_int = 30;
+pub const SIG_SETMASK: ::c_int = 3;
+
+pub const RUSAGE_CHILDREN: ::c_int = -1;
+
+pub const SOCK_STREAM: ::c_int = 1;
+pub const SOCK_DGRAM: ::c_int = 2;
+
+pub const SOL_SOCKET: ::c_int = -1;
+pub const SO_ACCEPTCONN: ::c_int = 0x00000001;
+pub const SO_BROADCAST: ::c_int = 0x00000002;
+pub const SO_DONTROUTE: ::c_int = 0x00000008;
+pub const SO_KEEPALIVE: ::c_int = 0x00000010;
+pub const SO_OOBINLINE: ::c_int = 0x00000020;
+pub const SO_REUSEADDR: ::c_int = 0x00000040;
+pub const SO_REUSEPORT: ::c_int = 0x00000080;
+pub const SO_USELOOPBACK: ::c_int = 0x00000100;
+pub const SO_LINGER: ::c_int = 0x00000200;
+pub const SO_SNDBUF: ::c_int = 0x40000001;
+pub const SO_SNDLOWAT: ::c_int = 0x40000002;
+pub const SO_SNDTIMEO: ::c_int = 0x40000003;
+pub const SO_RCVBUF: ::c_int = 0x40000004;
+pub const SO_RCVLOWAT: ::c_int = 0x40000005;
+pub const SO_RCVTIMEO: ::c_int = 0x40000006;
+pub const SO_ERROR: ::c_int = 0x40000007;
+pub const SO_TYPE: ::c_int = 0x40000008;
+pub const SO_NONBLOCK: ::c_int = 0x40000009;
+pub const SO_BINDTODEVICE: ::c_int = 0x4000000a;
+pub const SO_PEERCRED: ::c_int = 0x4000000b;
+
+pub const NI_MAXHOST: ::size_t = 1025;
+
+f! {
+    pub fn FD_CLR(fd: ::c_int, set: *mut fd_set) -> () {
+        let fd = fd as usize;
+        let size = mem::size_of_val(&(*set).fds_bits[0]) * 8;
+        (*set).fds_bits[fd / size] &= !(1 << (fd % size));
+        return
+    }
+
+    pub fn FD_ISSET(fd: ::c_int, set: *mut fd_set) -> bool {
+        let fd = fd as usize;
+        let size = mem::size_of_val(&(*set).fds_bits[0]) * 8;
+        return ((*set).fds_bits[fd / size] & (1 << (fd % size))) != 0
+    }
+
+    pub fn FD_SET(fd: ::c_int, set: *mut fd_set) -> () {
+        let fd = fd as usize;
+        let size = mem::size_of_val(&(*set).fds_bits[0]) * 8;
+        (*set).fds_bits[fd / size] |= 1 << (fd % size);
+        return
+    }
+
+    pub fn FD_ZERO(set: *mut fd_set) -> () {
+        for slot in (*set).fds_bits.iter_mut() {
+            *slot = 0;
+        }
+    }
+
+    pub fn WIFEXITED(status: ::c_int) -> bool {
+        (status >> 8) == 0
+    }
+
+    pub fn WEXITSTATUS(status: ::c_int) -> ::c_int {
+        (status & 0xff)
+    }
+
+    pub fn WTERMSIG(status: ::c_int) -> ::c_int {
+        (status >> 8) & 0xff
+    }
+}
+
+extern {
+    pub fn clock_gettime(clk_id: ::c_int, tp: *mut ::timespec) -> ::c_int;
+    pub fn pthread_attr_getguardsize(attr: *const ::pthread_attr_t,
+                                     guardsize: *mut ::size_t) -> ::c_int;
+    pub fn pthread_attr_getstack(attr: *const ::pthread_attr_t,
+                                 stackaddr: *mut *mut ::c_void,
+                                 stacksize: *mut ::size_t) -> ::c_int;
+    pub fn memalign(align: ::size_t, size: ::size_t) -> *mut ::c_void;
+    pub fn setgroups(ngroups: ::size_t,
+                     ptr: *const ::gid_t) -> ::c_int;
+    pub fn getpwuid_r(uid: ::uid_t,
+                      pwd: *mut passwd,
+                      buffer: *mut ::c_char,
+                      bufferSize: ::size_t,
+                      result: *mut *mut passwd) -> ::c_int;
+    pub fn ioctl(fd: ::c_int, request: ::c_int, ...) -> ::c_int;
+    pub fn mprotect(addr: *const ::c_void, len: ::size_t, prot: ::c_int)
+                    -> ::c_int;
+    pub fn getnameinfo(sa: *const ::sockaddr,
+                       salen: ::socklen_t,
+                       host: *mut ::c_char,
+                       hostlen: ::size_t,
+                       serv: *mut ::c_char,
+                       sevlen: ::size_t,
+                       flags: ::c_int) -> ::c_int;
+}
+
+cfg_if! {
+    if #[cfg(target_pointer_width = "64")] {
+        mod b64;
+    } else {
+        mod b32;
+    }
+}
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 15c4f12ceb..e822b063d9 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -224,6 +224,10 @@ cfg_if! {
         #[link(name = "c")]
         #[link(name = "m")]
         extern {}
+    } else if #[cfg(target_os = "haiku")] {
+        #[link(name = "root")]
+        #[link(name = "network")]
+        extern {}
     } else {
         #[link(name = "c")]
         #[link(name = "m")]
@@ -726,8 +730,6 @@ extern {
 // TODO: get rid of this cfg(not(...))
 #[cfg(not(target_os = "android"))] // " if " -- appease style checker
 extern {
-    pub fn getifaddrs(ifap: *mut *mut ifaddrs) -> ::c_int;
-    pub fn freeifaddrs(ifa: *mut ifaddrs);
     #[cfg_attr(target_os = "macos", link_name = "glob$INODE64")]
     #[cfg_attr(target_os = "netbsd", link_name = "__glob30")]
     pub fn glob(pattern: *const c_char,
@@ -851,6 +853,9 @@ cfg_if! {
     } else if #[cfg(target_os = "solaris")] {
         mod solaris;
         pub use self::solaris::*;
+    } else if #[cfg(target_os = "haiku")] {
+        mod haiku;
+        pub use self::haiku::*;
     } else {
         // Unknown target_os
     }
diff --git a/src/unix/notbsd/linux/mod.rs b/src/unix/notbsd/linux/mod.rs
index b767e0a4ec..32ad3cf17e 100644
--- a/src/unix/notbsd/linux/mod.rs
+++ b/src/unix/notbsd/linux/mod.rs
@@ -716,6 +716,8 @@ extern {
     pub fn if_freenameindex(ptr: *mut if_nameindex);
     pub fn sync_file_range(fd: ::c_int, offset: ::off64_t,
                            nbytes: ::off64_t, flags: ::c_uint) -> ::c_int;
+    pub fn getifaddrs(ifap: *mut *mut ::ifaddrs) -> ::c_int;
+    pub fn freeifaddrs(ifa: *mut ::ifaddrs);
 }
 
 cfg_if! {
diff --git a/src/unix/solaris/mod.rs b/src/unix/solaris/mod.rs
index e9304d5ee4..2079e25c85 100644
--- a/src/unix/solaris/mod.rs
+++ b/src/unix/solaris/mod.rs
@@ -955,6 +955,9 @@ f! {
 }
 
 extern {
+    pub fn getifaddrs(ifap: *mut *mut ::ifaddrs) -> ::c_int;
+    pub fn freeifaddrs(ifa: *mut ::ifaddrs);
+
     pub fn stack_getbounds(sp: *mut ::stack_t) -> ::c_int;
     pub fn mincore(addr: *const ::c_void, len: ::size_t,
                    vec: *mut c_char) -> ::c_int;