Update libc crate to 0.2.55

This change updates the libc crate to version 0.2.55.

Import subrepo libc/:libc at caf17a0641d29dc624621177f5756804dd180c13

17 files changed, 1167 insertions, 320 deletions

diff --git a/libc/src/unix/uclibc/align.rs b/libc/src/unix/uclibc/align.rs
new file mode 100644
index 0000000..3307c9d
--- /dev/null
+++ b/libc/src/unix/uclibc/align.rs
@@ -0,0 +1,66 @@
+macro_rules! expand_align {
+    () => {
+        s! {
+            #[cfg_attr(any(target_pointer_width = "32",
+                           target_arch = "x86_64",
+                           target_arch = "powerpc64",
+                           target_arch = "mips64",
+                           target_arch = "s390x",
+                           target_arch = "sparc64"),
+                       repr(align(4)))]
+            #[cfg_attr(not(any(target_pointer_width = "32",
+                               target_arch = "x86_64",
+                               target_arch = "powerpc64",
+                               target_arch = "mips64",
+                               target_arch = "s390x",
+                               target_arch = "sparc64")),
+                       repr(align(8)))]
+            pub struct pthread_mutexattr_t {
+                size: [u8; ::__SIZEOF_PTHREAD_MUTEXATTR_T],
+            }
+
+            #[repr(align(4))]
+            pub struct pthread_condattr_t {
+                size: [u8; ::__SIZEOF_PTHREAD_CONDATTR_T],
+            }
+        }
+
+        s_no_extra_traits! {
+            #[repr(align(8))]
+            #[allow(missing_debug_implementations)]
+            pub struct pthread_cond_t {
+                size: [u8; ::__SIZEOF_PTHREAD_COND_T],
+            }
+
+            #[cfg_attr(all(target_pointer_width = "32",
+                           any(target_arch = "mips",
+                               target_arch = "arm",
+                               target_arch = "powerpc")),
+                       repr(align(4)))]
+            #[cfg_attr(any(target_pointer_width = "64",
+                           not(any(target_arch = "mips",
+                                   target_arch = "arm",
+                                   target_arch = "powerpc"))),
+                       repr(align(8)))]
+            #[allow(missing_debug_implementations)]
+            pub struct pthread_mutex_t {
+                size: [u8; ::__SIZEOF_PTHREAD_MUTEX_T],
+            }
+
+            #[cfg_attr(all(target_pointer_width = "32",
+                           any(target_arch = "mips",
+                               target_arch = "arm",
+                               target_arch = "powerpc")),
+                       repr(align(4)))]
+            #[cfg_attr(any(target_pointer_width = "64",
+                           not(any(target_arch = "mips",
+                                   target_arch = "arm",
+                                   target_arch = "powerpc"))),
+                       repr(align(8)))]
+            #[allow(missing_debug_implementations)]
+            pub struct pthread_rwlock_t {
+                size: [u8; ::__SIZEOF_PTHREAD_RWLOCK_T],
+            }
+        }
+    }
+}
diff --git a/libc/src/unix/uclibc/arm/align.rs b/libc/src/unix/uclibc/arm/align.rs
new file mode 100644
index 0000000..4a0e074
--- /dev/null
+++ b/libc/src/unix/uclibc/arm/align.rs
@@ -0,0 +1,13 @@
+s! {
+    // FIXME this is actually a union
+    #[cfg_attr(target_pointer_width = "32",
+               repr(align(4)))]
+    #[cfg_attr(target_pointer_width = "64",
+               repr(align(8)))]
+    pub struct sem_t {
+        #[cfg(target_pointer_width = "32")]
+        __size: [::c_char; 16],
+        #[cfg(target_pointer_width = "64")]
+        __size: [::c_char; 32],
+    }
+}
diff --git a/libc/src/unix/uclibc/arm/mod.rs b/libc/src/unix/uclibc/arm/mod.rs
new file mode 100644
index 0000000..b250fb5
--- /dev/null
+++ b/libc/src/unix/uclibc/arm/mod.rs
@@ -0,0 +1,687 @@
+pub type c_char = u8;
+pub type wchar_t = ::c_uint;
+pub type c_long = i32;
+pub type c_ulong = u32;
+pub type time_t = ::c_long;
+
+pub type clock_t = ::c_long;
+pub type fsblkcnt_t = ::c_ulong;
+pub type fsfilcnt_t = ::c_ulong;
+pub type ino_t = ::c_ulong;
+pub type off_t = ::c_long;
+pub type pthread_t = ::c_ulong;
+pub type rlim_t = ::c_ulong;
+pub type suseconds_t = ::c_long;
+
+pub type nlink_t = ::c_uint;
+pub type blksize_t = ::c_long;
+pub type blkcnt_t = ::c_long;
+
+s! {
+    pub struct cmsghdr {
+        pub cmsg_len: ::size_t,
+        pub cmsg_level: ::c_int,
+        pub cmsg_type: ::c_int,
+    }
+
+    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 pthread_attr_t {
+        __size: [::c_long; 9],
+    }
+
+    pub struct stat {
+        pub st_dev: ::c_ulonglong,
+        pub __pad1: ::c_ushort,
+        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: ::c_ulonglong,
+        pub __pad2: ::c_ushort,
+        pub st_size: ::off_t,
+        pub st_blksize: ::blksize_t,
+        pub st_blocks: ::blkcnt_t,
+        pub st_atim: ::timespec,
+        pub st_mtim: ::timespec,
+        pub st_ctim: ::timespec,
+        pub __unused4: ::c_ulong,
+        pub __unused5: ::c_ulong,
+    }
+
+    pub struct stat64
+    {
+        pub st_dev: ::c_ulonglong,
+        pub __pad1: ::c_uint,
+        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: ::c_ulonglong,
+        pub __pad2: ::c_uint,
+        pub st_size: ::off64_t,
+        pub st_blksize: ::blksize_t,
+        pub st_blocks: ::blkcnt64_t,
+        pub st_atim: ::timespec,
+        pub st_mtim: ::timespec,
+        pub st_ctim: ::timespec,
+        pub st_ino: ::ino64_t,
+    }
+
+    pub struct flock {
+        pub l_type: ::c_short,
+        pub l_whence: ::c_short,
+        pub l_start: ::off_t,
+        pub l_len: ::off_t,
+        pub l_pid: ::pid_t,
+    }
+
+    pub struct statfs {
+        pub f_type: ::c_int,
+        pub f_bsize: ::c_int,
+        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_fsid: ::fsid_t,
+        pub f_namelen: ::c_int,
+        pub f_frsize: ::c_int,
+        pub f_spare: [::c_int; 5],
+    }
+
+    pub struct sigset_t {
+        __val: [::c_ulong; 2],
+    }
+
+    pub struct sigaction {
+        pub sa_sigaction: ::sighandler_t,
+        // uClibc defines sa_flags as `unsigned long int`,
+        // but nix crate expects `int`
+        pub sa_flags: ::c_int,
+        pub sa_restorer: *mut ::c_void,
+        pub sa_mask: sigset_t,
+    }
+
+    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],
+        pub c_ispeed: ::speed_t,
+        pub c_ospeed: ::speed_t,
+    }
+
+    pub struct siginfo_t {
+        pub si_signo: ::c_int,
+        pub si_errno: ::c_int,
+        pub si_code: ::c_int,
+        pub _pad: [::c_int; 29],
+    }
+
+    pub struct stack_t {
+        pub ss_sp: *mut ::c_void,
+        ss_flags: ::c_int,
+        ss_size: ::size_t,
+    }
+
+    pub struct ipc_perm {
+        pub __key: ::key_t,
+        pub uid: ::uid_t,
+        pub gid: ::gid_t,
+        pub cuid: ::uid_t,
+        pub cgid: ::gid_t,
+        pub mode: ::c_ushort,
+        pub __pad1: ::c_ushort,
+        pub __seq: ::c_ushort,
+        pub __pad2: ::c_ushort,
+        pub __unused1: ::c_ulong,
+        pub __unused2: ::c_ulong,
+    }
+
+    pub struct msqid_ds {
+        pub msg_perm: ::ipc_perm,
+        pub msg_stime: ::time_t,
+        pub __unused1: ::c_ulong,
+        pub msg_rtime: ::time_t,
+        pub __unused2: ::c_ulong,
+        pub msg_ctime: ::time_t,
+        pub __unused3: ::c_ulong,
+        pub __msg_cbytes: ::c_ulong,
+        pub msg_qnum: ::msgqnum_t,
+        pub msg_qbytes: ::msglen_t,
+        pub msg_lspid: ::pid_t,
+        pub msg_lrpid: ::pid_t,
+        pub __unused4: ::c_ulong,
+        pub __unused5: ::c_ulong,
+    }
+
+    pub struct shmid_ds {
+        pub shm_perm: ::ipc_perm,
+        pub shm_segsz: ::size_t,
+        pub shm_atime: ::time_t,
+        pub __unused1: ::c_ulong,
+        pub shm_dtime: ::time_t,
+        pub __unused2: ::c_ulong,
+        pub shm_ctime: ::time_t,
+        pub __unused3: ::c_ulong,
+        pub shm_cpid: ::pid_t,
+        pub shm_lpid: ::pid_t,
+        pub shm_nattch: ::shmatt_t,
+        pub __unused4: ::c_ulong,
+        pub __unused5: ::c_ulong,
+    }
+
+    pub struct ucred {
+        pub pid: ::pid_t,
+        pub uid: ::uid_t,
+        pub gid: ::gid_t,
+    }
+
+}
+
+pub const O_CLOEXEC: ::c_int = 0o2000000;
+pub const RLIM_INFINITY: rlim_t = !0;
+pub const __SIZEOF_PTHREAD_ATTR_T: usize = 36;
+pub const __SIZEOF_PTHREAD_MUTEX_T: usize = 24;
+pub const __SIZEOF_PTHREAD_MUTEXATTR_T: usize = 4;
+pub const __SIZEOF_PTHREAD_COND_COMPAT_T: usize = 12;
+pub const __SIZEOF_PTHREAD_CONDATTR_T: usize = 4;
+pub const __SIZEOF_PTHREAD_RWLOCK_T: usize = 32;
+pub const __SIZEOF_PTHREAD_RWLOCKATTR_T: usize = 8;
+pub const __SIZEOF_PTHREAD_BARRIER_T: usize = 20;
+pub const __SIZEOF_PTHREAD_BARRIERATTR_T: usize = 4;
+pub const NCCS: usize = 32;
+
+// I wasn't able to find those constants
+// in uclibc build environment for armv7
+pub const AIO_ALLDONE: ::c_int = 2; // from linux/mod.rs
+pub const AIO_CANCELED: ::c_int = 0; // from linux/mod.rs
+pub const AIO_NOTCANCELED: ::c_int = 1; // from linux/mod.rs
+pub const CLONE_NEWCGROUP: ::c_int = 0x02000000; // from linux/mod.rs
+pub const EPOLLEXCLUSIVE: ::c_int = 0x10000000; // from linux/mod.rs
+pub const EPOLLWAKEUP: ::c_int = 0x20000000; // from linux/other/mod.rs
+pub const EXTPROC: ::tcflag_t = 0o200000; // from asm-generic/termbits.h
+pub const F_GETPIPE_SZ: ::c_int = 1032; // from notbsd/mod.rs
+pub const F_SETPIPE_SZ: ::c_int = 1031; // from notbsd/mod.rs
+pub const LIO_NOP: ::c_int = 2; // from linux/mod.rs
+pub const LIO_NOWAIT: ::c_int = 1; // from linux/mod.rs
+pub const LIO_READ: ::c_int = 0; // from linux/mod.rs
+pub const LIO_WAIT: ::c_int = 0; // from linux/mod.rs
+pub const LIO_WRITE: ::c_int = 1; // from linux/mod.rs
+pub const MAP_HUGETLB: ::c_int = 0x040000; // from linux/other/mod.rs
+pub const O_TMPFILE: ::c_int = 0o20000000 | O_DIRECTORY;
+pub const RB_KEXEC: ::c_int = 0x45584543u32 as i32; // from linux/mod.rs
+pub const RB_SW_SUSPEND: ::c_int = 0xd000fce2u32 as i32; // from linux/mod.rs
+pub const SO_BUSY_POLL: ::c_int = 46; // from src/unix/notbsd/mod.rs
+pub const SO_PEEK_OFF: ::c_int = 42; // from src/unix/notbsd/mod.rs
+pub const SO_REUSEPORT: ::c_int = 15; // from src/unix/notbsd/mod.rs
+pub const SOL_NETLINK: ::c_int = 270; // from src/unix/notbsd/mod.rs
+pub const _POSIX_VDISABLE: ::cc_t = 0; // from linux/mod.rs
+pub const AT_EMPTY_PATH: ::c_int = 0x1000; // from notbsd/mod.rs
+
+// autogenerated constants with hand tuned types
+pub const AT_NO_AUTOMOUNT: ::c_int = 0x800;
+pub const B0: ::speed_t = 0;
+pub const B1000000: ::speed_t = 0x1008;
+pub const B110: ::speed_t = 0x3;
+pub const B115200: ::speed_t = 0x1002;
+pub const B1152000: ::speed_t = 0x1009;
+pub const B1200: ::speed_t = 0x9;
+pub const B134: ::speed_t = 0x4;
+pub const B150: ::speed_t = 0x5;
+pub const B1500000: ::speed_t = 0x100a;
+pub const B1800: ::speed_t = 0xa;
+pub const B19200: ::speed_t = 0xe;
+pub const B200: ::speed_t = 0x6;
+pub const B2000000: ::speed_t = 0x100b;
+pub const B230400: ::speed_t = 0x1003;
+pub const B2400: ::speed_t = 0xb;
+pub const B2500000: ::speed_t = 0x100c;
+pub const B300: ::speed_t = 0x7;
+pub const B3000000: ::speed_t = 0x100d;
+pub const B3500000: ::speed_t = 0x100e;
+pub const B38400: ::speed_t = 0xf;
+pub const B4000000: ::speed_t = 0x100f;
+pub const B460800: ::speed_t = 0x1004;
+pub const B4800: ::speed_t = 0xc;
+pub const B50: ::speed_t = 0x1;
+pub const B500000: ::speed_t = 0x1005;
+pub const B57600: ::speed_t = 0x1001;
+pub const B576000: ::speed_t = 0x1006;
+pub const B600: ::speed_t = 0x8;
+pub const B75: ::speed_t = 0x2;
+pub const B921600: ::speed_t = 0x1007;
+pub const B9600: ::speed_t = 0xd;
+pub const BS1: ::c_int = 0x2000;
+pub const BSDLY: ::c_int = 0x2000;
+pub const CBAUD: ::tcflag_t = 0x100f;
+pub const CBAUDEX: ::tcflag_t = 0x1000;
+pub const CIBAUD: ::tcflag_t = 0x100f0000;
+pub const CLOCAL: ::tcflag_t = 0x800;
+pub const CMSPAR: ::tcflag_t = 0x40000000;
+pub const CPU_SETSIZE: ::c_int = 0x400;
+pub const CR1: ::c_int = 0x200;
+pub const CR2: ::c_int = 0x400;
+pub const CR3: ::c_int = 0x600;
+pub const CRDLY: ::c_int = 0x600;
+pub const CREAD: ::tcflag_t = 0x80;
+pub const CS6: ::tcflag_t = 0x10;
+pub const CS7: ::tcflag_t = 0x20;
+pub const CS8: ::tcflag_t = 0x30;
+pub const CSIZE: ::tcflag_t = 0x30;
+pub const CSTOPB: ::tcflag_t = 0x40;
+pub const EADDRINUSE: ::c_int = 0x62;
+pub const EADDRNOTAVAIL: ::c_int = 0x63;
+pub const EADV: ::c_int = 0x44;
+pub const EAFNOSUPPORT: ::c_int = 0x61;
+pub const EALREADY: ::c_int = 0x72;
+pub const EBADE: ::c_int = 0x34;
+pub const EBADFD: ::c_int = 0x4d;
+pub const EBADMSG: ::c_int = 0x4a;
+pub const EBADR: ::c_int = 0x35;
+pub const EBADRQC: ::c_int = 0x38;
+pub const EBADSLT: ::c_int = 0x39;
+pub const EBFONT: ::c_int = 0x3b;
+pub const ECANCELED: ::c_int = 0x7d;
+pub const ECHOCTL: ::tcflag_t = 0x200;
+pub const ECHOE: ::tcflag_t = 0x10;
+pub const ECHOK: ::tcflag_t = 0x20;
+pub const ECHOKE: ::tcflag_t = 0x800;
+pub const ECHONL: ::tcflag_t = 0x40;
+pub const ECHOPRT: ::tcflag_t = 0x400;
+pub const ECHRNG: ::c_int = 0x2c;
+pub const ECOMM: ::c_int = 0x46;
+pub const ECONNABORTED: ::c_int = 0x67;
+pub const ECONNREFUSED: ::c_int = 0x6f;
+pub const ECONNRESET: ::c_int = 0x68;
+pub const EDEADLK: ::c_int = 0x23;
+pub const EDESTADDRREQ: ::c_int = 0x59;
+pub const EDOTDOT: ::c_int = 0x49;
+pub const EDQUOT: ::c_int = 0x7a;
+pub const EFD_CLOEXEC: ::c_int = 0x80000;
+pub const EFD_NONBLOCK: ::c_int = 0x800;
+pub const EHOSTDOWN: ::c_int = 0x70;
+pub const EHOSTUNREACH: ::c_int = 0x71;
+pub const EHWPOISON: ::c_int = 0x85;
+pub const EIDRM: ::c_int = 0x2b;
+pub const EILSEQ: ::c_int = 0x54;
+pub const EINPROGRESS: ::c_int = 0x73;
+pub const EISCONN: ::c_int = 0x6a;
+pub const EISNAM: ::c_int = 0x78;
+pub const EKEYEXPIRED: ::c_int = 0x7f;
+pub const EKEYREJECTED: ::c_int = 0x81;
+pub const EKEYREVOKED: ::c_int = 0x80;
+pub const EL2HLT: ::c_int = 0x33;
+pub const EL2NSYNC: ::c_int = 0x2d;
+pub const EL3HLT: ::c_int = 0x2e;
+pub const EL3RST: ::c_int = 0x2f;
+pub const ELIBACC: ::c_int = 0x4f;
+pub const ELIBBAD: ::c_int = 0x50;
+pub const ELIBEXEC: ::c_int = 0x53;
+pub const ELIBMAX: ::c_int = 0x52;
+pub const ELIBSCN: ::c_int = 0x51;
+pub const ELNRNG: ::c_int = 0x30;
+pub const ELOOP: ::c_int = 0x28;
+pub const EMEDIUMTYPE: ::c_int = 0x7c;
+pub const EMSGSIZE: ::c_int = 0x5a;
+pub const EMULTIHOP: ::c_int = 0x48;
+pub const ENAMETOOLONG: ::c_int = 0x24;
+pub const ENAVAIL: ::c_int = 0x77;
+pub const ENETDOWN: ::c_int = 0x64;
+pub const ENETRESET: ::c_int = 0x66;
+pub const ENETUNREACH: ::c_int = 0x65;
+pub const ENOANO: ::c_int = 0x37;
+pub const ENOBUFS: ::c_int = 0x69;
+pub const ENOCSI: ::c_int = 0x32;
+pub const ENODATA: ::c_int = 0x3d;
+pub const ENOKEY: ::c_int = 0x7e;
+pub const ENOLCK: ::c_int = 0x25;
+pub const ENOLINK: ::c_int = 0x43;
+pub const ENOMEDIUM: ::c_int = 0x7b;
+pub const ENOMSG: ::c_int = 0x2a;
+pub const ENONET: ::c_int = 0x40;
+pub const ENOPKG: ::c_int = 0x41;
+pub const ENOPROTOOPT: ::c_int = 0x5c;
+pub const ENOSR: ::c_int = 0x3f;
+pub const ENOSTR: ::c_int = 0x3c;
+pub const ENOSYS: ::c_int = 0x26;
+pub const ENOTCONN: ::c_int = 0x6b;
+pub const ENOTEMPTY: ::c_int = 0x27;
+pub const ENOTNAM: ::c_int = 0x76;
+pub const ENOTRECOVERABLE: ::c_int = 0x83;
+pub const ENOTSOCK: ::c_int = 0x58;
+pub const ENOTUNIQ: ::c_int = 0x4c;
+pub const EOPNOTSUPP: ::c_int = 0x5f;
+pub const EOVERFLOW: ::c_int = 0x4b;
+pub const EOWNERDEAD: ::c_int = 0x82;
+pub const EPFNOSUPPORT: ::c_int = 0x60;
+pub const EPOLL_CLOEXEC: ::c_int = 0x80000;
+pub const EPROTO: ::c_int = 0x47;
+pub const EPROTONOSUPPORT: ::c_int = 0x5d;
+pub const EPROTOTYPE: ::c_int = 0x5b;
+pub const EREMCHG: ::c_int = 0x4e;
+pub const EREMOTE: ::c_int = 0x42;
+pub const EREMOTEIO: ::c_int = 0x79;
+pub const ERESTART: ::c_int = 0x55;
+pub const ERFKILL: ::c_int = 0x84;
+pub const ESHUTDOWN: ::c_int = 0x6c;
+pub const ESOCKTNOSUPPORT: ::c_int = 0x5e;
+pub const ESRMNT: ::c_int = 0x45;
+pub const ESTALE: ::c_int = 0x74;
+pub const ESTRPIPE: ::c_int = 0x56;
+pub const ETIME: ::c_int = 0x3e;
+pub const ETIMEDOUT: ::c_int = 0x6e;
+pub const ETOOMANYREFS: ::c_int = 0x6d;
+pub const EUCLEAN: ::c_int = 0x75;
+pub const EUNATCH: ::c_int = 0x31;
+pub const EUSERS: ::c_int = 0x57;
+pub const EXFULL: ::c_int = 0x36;
+pub const FF1: ::c_int = 0x8000;
+pub const FFDLY: ::c_int = 0x8000;
+pub const FIONBIO: ::c_ulong = 0x5421;
+pub const FIOCLEX: ::c_ulong = 0x5451;
+pub const FLUSHO: ::tcflag_t = 0x1000;
+pub const F_GETLK: ::c_int = 0x5;
+pub const F_SETLK: ::c_int = 0x6;
+pub const F_SETLKW: ::c_int = 0x7;
+pub const HUPCL: ::tcflag_t = 0x400;
+pub const ICANON: ::tcflag_t = 0x2;
+pub const IEXTEN: ::tcflag_t = 0x8000;
+pub const IPV6_MULTICAST_HOPS: ::c_int = 0x12;
+pub const IPV6_MULTICAST_IF: ::c_int = 0x11;
+pub const IPV6_UNICAST_HOPS: ::c_int = 0x10;
+pub const IP_MULTICAST_IF: ::c_int = 0x20;
+pub const ISIG: ::tcflag_t = 0x1;
+pub const IUTF8: ::tcflag_t = 0x4000;
+pub const IXOFF: ::tcflag_t = 0x1000;
+pub const IXON: ::tcflag_t = 0x400;
+pub const MAP_ANON: ::c_int = 0x20;
+pub const MAP_ANONYMOUS: ::c_int = 0x20;
+pub const MAP_DENYWRITE: ::c_int = 0x800;
+pub const MAP_EXECUTABLE: ::c_int = 0x1000;
+pub const MAP_GROWSDOWN: ::c_int = 0x100;
+pub const MAP_LOCKED: ::c_int = 0x2000;
+pub const MAP_NONBLOCK: ::c_int = 0x10000;
+pub const MAP_NORESERVE: ::c_int = 0x4000;
+pub const MAP_POPULATE: ::c_int = 0x8000;
+pub const MAP_STACK: ::c_int = 0x20000;
+pub const MS_ACTIVE: u32 = 0x40000000;
+pub const MS_DIRSYNC: u32 = 0x80;
+pub const MS_I_VERSION: u32 = 0x800000;
+pub const MS_KERNMOUNT: u32 = 0x400000;
+pub const MS_MOVE: u32 = 0x2000;
+pub const MS_POSIXACL: u32 = 0x10000;
+pub const MS_PRIVATE: u32 = 0x40000;
+pub const MS_REC: u32 = 0x4000;
+pub const MS_RELATIME: u32 = 0x200000;
+pub const MS_SHARED: u32 = 0x100000;
+pub const MS_SILENT: u32 = 0x8000;
+pub const MS_SLAVE: u32 = 0x80000;
+pub const MS_STRICTATIME: u32 = 0x1000000;
+pub const MS_UNBINDABLE: u32 = 0x20000;
+pub const NLDLY: ::tcflag_t = 0x100;
+pub const NOFLSH: ::tcflag_t = 0x80;
+pub const OCRNL: ::c_int = 0x8;
+pub const OFDEL: ::c_int = 0x80;
+pub const OFILL: ::c_int = 0x40;
+pub const OLCUC: ::tcflag_t = 0x2;
+pub const ONLCR: ::tcflag_t = 0x4;
+pub const ONLRET: ::tcflag_t = 0x20;
+pub const ONOCR: ::tcflag_t = 0x10;
+pub const O_ACCMODE: ::c_int = 0x3;
+pub const O_APPEND: ::c_int = 0x400;
+pub const O_CREAT: ::c_int = 0x40;
+pub const O_DIRECT: ::c_int = 0x10000;
+pub const O_DIRECTORY: ::c_int = 0x4000;
+pub const O_DSYNC: ::c_int = 0x1000;
+pub const O_EXCL: ::c_int = 0x80;
+pub const O_NDELAY: ::c_int = 0x800;
+pub const O_NOCTTY: ::c_int = 0x100;
+pub const O_NOFOLLOW: ::c_int = 0x8000;
+pub const O_NONBLOCK: ::c_int = 0x800;
+pub const O_SYNC: ::c_int = 0o10000;
+pub const O_TRUNC: ::c_int = 0x200;
+pub const PARENB: ::tcflag_t = 0x100;
+pub const PARODD: ::tcflag_t = 0x200;
+pub const PENDIN: ::tcflag_t = 0x4000;
+pub const POLLRDBAND: ::c_short = 0x80;
+pub const POLLRDNORM: ::c_short = 0x40;
+pub const POLLWRBAND: ::c_short = 0x200;
+pub const POLLWRNORM: ::c_short = 0x100;
+pub const QIF_ALL: ::uint32_t = 0x3f;
+pub const QIF_BLIMITS: ::uint32_t = 0x1;
+pub const QIF_BTIME: ::uint32_t = 0x10;
+pub const QIF_ILIMITS: ::uint32_t = 0x4;
+pub const QIF_INODES: ::uint32_t = 0x8;
+pub const QIF_ITIME: ::uint32_t = 0x20;
+pub const QIF_LIMITS: ::uint32_t = 0x5;
+pub const QIF_SPACE: ::uint32_t = 0x2;
+pub const QIF_TIMES: ::uint32_t = 0x30;
+pub const QIF_USAGE: ::uint32_t = 0xa;
+pub const SA_NOCLDSTOP: ::c_int = 0x1;
+pub const SA_NOCLDWAIT: ::c_int = 0x2;
+pub const SA_NODEFER: ::c_int = 0x40000000;
+pub const SA_ONSTACK: ::c_int = 0x8000000;
+pub const SA_RESETHAND: ::c_int = 0x80000000;
+pub const SA_RESTART: ::c_int = 0x10000000;
+pub const SA_SIGINFO: ::c_int = 0x4;
+pub const SFD_CLOEXEC: ::c_int = 0x80000;
+pub const SFD_NONBLOCK: ::c_int = 0x800;
+pub const SIGBUS: ::c_int = 0x7;
+pub const SIGCHLD: ::c_int = 0x11;
+pub const SIGCONT: ::c_int = 0x12;
+pub const SIGIO: ::c_int = 0x1d;
+pub const SIGPROF: ::c_int = 0x1b;
+pub const SIGPWR: ::c_int = 0x1e;
+pub const SIGSTKFLT: ::c_int = 0x10;
+pub const SIGSTOP: ::c_int = 0x13;
+pub const SIGSYS: ::c_int = 0x1f;
+pub const SIGTSTP: ::c_int = 0x14;
+pub const SIGTTIN: ::c_int = 0x15;
+pub const SIGTTOU: ::c_int = 0x16;
+pub const SIGURG: ::c_int = 0x17;
+pub const SIGUSR1: ::c_int = 0xa;
+pub const SIGUSR2: ::c_int = 0xc;
+pub const SIGVTALRM: ::c_int = 0x1a;
+pub const SIGWINCH: ::c_int = 0x1c;
+pub const SIGXCPU: ::c_int = 0x18;
+pub const SIGXFSZ: ::c_int = 0x19;
+pub const SIG_BLOCK: ::c_int = 0;
+pub const SIG_SETMASK: ::c_int = 0x2;
+pub const SIG_UNBLOCK: ::c_int = 0x1;
+pub const SOCK_DGRAM: ::c_int = 0x2;
+pub const SOCK_NONBLOCK: ::c_int = 0o0004000;
+pub const SOCK_SEQPACKET: ::c_int = 0x5;
+pub const SOCK_STREAM: ::c_int = 0x1;
+pub const SOL_SOCKET: ::c_int = 0x1;
+pub const SO_ACCEPTCONN: ::c_int = 0x1e;
+pub const SO_BINDTODEVICE: ::c_int = 0x19;
+pub const SO_BROADCAST: ::c_int = 0x6;
+pub const SO_BSDCOMPAT: ::c_int = 0xe;
+pub const SO_DOMAIN: ::c_int = 0x27;
+pub const SO_DONTROUTE: ::c_int = 0x5;
+pub const SO_ERROR: ::c_int = 0x4;
+pub const SO_KEEPALIVE: ::c_int = 0x9;
+pub const SO_LINGER: ::c_int = 0xd;
+pub const SO_MARK: ::c_int = 0x24;
+pub const SO_OOBINLINE: ::c_int = 0xa;
+pub const SO_PASSCRED: ::c_int = 0x10;
+pub const SO_PEERCRED: ::c_int = 0x11;
+pub const SO_PRIORITY: ::c_int = 0xc;
+pub const SO_PROTOCOL: ::c_int = 0x26;
+pub const SO_RCVBUF: ::c_int = 0x8;
+pub const SO_RCVLOWAT: ::c_int = 0x12;
+pub const SO_RCVTIMEO: ::c_int = 0x14;
+pub const SO_REUSEADDR: ::c_int = 0x2;
+pub const SO_RXQ_OVFL: ::c_int = 0x28;
+pub const SO_SNDBUF: ::c_int = 0x7;
+pub const SO_SNDBUFFORCE: ::c_int = 0x20;
+pub const SO_SNDLOWAT: ::c_int = 0x13;
+pub const SO_SNDTIMEO: ::c_int = 0x15;
+pub const SO_TIMESTAMP: ::c_int = 0x1d;
+pub const SO_TYPE: ::c_int = 0x3;
+pub const SYS_gettid: ::c_int = 0xe0;
+pub const TAB1: ::c_int = 0x800;
+pub const TAB2: ::c_int = 0x1000;
+pub const TAB3: ::c_int = 0x1800;
+pub const TABDLY: ::c_int = 0x1800;
+pub const TCSADRAIN: ::c_int = 0x1;
+pub const TCSAFLUSH: ::c_int = 0x2;
+pub const TCSANOW: ::c_int = 0;
+pub const TOSTOP: ::tcflag_t = 0x100;
+pub const VDISCARD: usize = 0xd;
+pub const VEOF: usize = 0x4;
+pub const VEOL: usize = 0xb;
+pub const VEOL2: usize = 0x10;
+pub const VMIN: usize = 0x6;
+pub const VREPRINT: usize = 0xc;
+pub const VSTART: usize = 0x8;
+pub const VSTOP: usize = 0x9;
+pub const VSUSP: usize = 0xa;
+pub const VSWTC: usize = 0x7;
+pub const VT1: ::c_int = 0x4000;
+pub const VTDLY: ::c_int = 0x4000;
+pub const VTIME: usize = 0x5;
+pub const VWERASE: usize = 0xe;
+pub const XTABS: ::tcflag_t = 0x1800;
+pub const _PC_2_SYMLINKS: ::c_int = 0x14;
+pub const _PC_ALLOC_SIZE_MIN: ::c_int = 0x12;
+pub const _PC_ASYNC_IO: ::c_int = 0xa;
+pub const _PC_FILESIZEBITS: ::c_int = 0xd;
+pub const _PC_PRIO_IO: ::c_int = 0xb;
+pub const _PC_REC_INCR_XFER_SIZE: ::c_int = 0xe;
+pub const _PC_REC_MAX_XFER_SIZE: ::c_int = 0xf;
+pub const _PC_REC_MIN_XFER_SIZE: ::c_int = 0x10;
+pub const _PC_REC_XFER_ALIGN: ::c_int = 0x11;
+pub const _PC_SYMLINK_MAX: ::c_int = 0x13;
+pub const _PC_SYNC_IO: ::c_int = 0x9;
+pub const _SC_2_PBS: ::c_int = 0xa8;
+pub const _SC_2_PBS_ACCOUNTING: ::c_int = 0xa9;
+pub const _SC_2_PBS_CHECKPOINT: ::c_int = 0xaf;
+pub const _SC_2_PBS_LOCATE: ::c_int = 0xaa;
+pub const _SC_2_PBS_MESSAGE: ::c_int = 0xab;
+pub const _SC_2_PBS_TRACK: ::c_int = 0xac;
+pub const _SC_ADVISORY_INFO: ::c_int = 0x84;
+pub const _SC_BARRIERS: ::c_int = 0x85;
+pub const _SC_CLOCK_SELECTION: ::c_int = 0x89;
+pub const _SC_CPUTIME: ::c_int = 0x8a;
+pub const _SC_IPV6: ::c_int = 0xeb;
+pub const _SC_MONOTONIC_CLOCK: ::c_int = 0x95;
+pub const _SC_RAW_SOCKETS: ::c_int = 0xec;
+pub const _SC_READER_WRITER_LOCKS: ::c_int = 0x99;
+pub const _SC_REGEXP: ::c_int = 0x9b;
+pub const _SC_SHELL: ::c_int = 0x9d;
+pub const _SC_SPAWN: ::c_int = 0x9f;
+pub const _SC_SPIN_LOCKS: ::c_int = 0x9a;
+pub const _SC_SPORADIC_SERVER: ::c_int = 0xa0;
+pub const _SC_SS_REPL_MAX: ::c_int = 0xf1;
+pub const _SC_SYMLOOP_MAX: ::c_int = 0xad;
+pub const _SC_THREAD_CPUTIME: ::c_int = 0x8b;
+pub const _SC_THREAD_PROCESS_SHARED: ::c_int = 0x52;
+pub const _SC_THREAD_ROBUST_PRIO_INHERIT: ::c_int = 0xf7;
+pub const _SC_THREAD_ROBUST_PRIO_PROTECT: ::c_int = 0xf8;
+pub const _SC_THREAD_SPORADIC_SERVER: ::c_int = 0xa1;
+pub const _SC_TIMEOUTS: ::c_int = 0xa4;
+pub const _SC_TRACE: ::c_int = 0xb5;
+pub const _SC_TRACE_EVENT_FILTER: ::c_int = 0xb6;
+pub const _SC_TRACE_EVENT_NAME_MAX: ::c_int = 0xf2;
+pub const _SC_TRACE_INHERIT: ::c_int = 0xb7;
+pub const _SC_TRACE_LOG: ::c_int = 0xb8;
+pub const _SC_TRACE_NAME_MAX: ::c_int = 0xf3;
+pub const _SC_TRACE_SYS_MAX: ::c_int = 0xf4;
+pub const _SC_TRACE_USER_EVENT_MAX: ::c_int = 0xf5;
+pub const _SC_TYPED_MEMORY_OBJECTS: ::c_int = 0xa5;
+pub const _SC_V6_ILP32_OFF32: ::c_int = 0xb0;
+pub const _SC_V6_ILP32_OFFBIG: ::c_int = 0xb1;
+pub const _SC_V6_LP64_OFF64: ::c_int = 0xb2;
+pub const _SC_V6_LPBIG_OFFBIG: ::c_int = 0xb3;
+pub const _SC_XOPEN_STREAMS: ::c_int = 0xf6;
+
+fn CMSG_ALIGN(len: usize) -> usize {
+    len + ::mem::size_of::<usize>() - 1 & !(::mem::size_of::<usize>() - 1)
+}
+
+f! {
+    pub fn CMSG_FIRSTHDR(mhdr: *const msghdr) -> *mut cmsghdr {
+        if (*mhdr).msg_controllen as usize >= ::mem::size_of::<cmsghdr>() {
+            (*mhdr).msg_control as *mut cmsghdr
+        } else {
+            0 as *mut cmsghdr
+        }
+    }
+
+    pub fn CMSG_DATA(cmsg: *const cmsghdr) -> *mut ::c_uchar {
+        cmsg.offset(1) as *mut ::c_uchar
+    }
+
+    pub fn CMSG_SPACE(length: ::c_uint) -> ::c_uint {
+        (CMSG_ALIGN(length as usize) + CMSG_ALIGN(::mem::size_of::<cmsghdr>()))
+            as ::c_uint
+    }
+
+    pub fn CMSG_LEN(length: ::c_uint) -> ::c_uint {
+        CMSG_ALIGN(::mem::size_of::<cmsghdr>()) as ::c_uint + length
+    }
+
+    pub fn CMSG_NXTHDR(mhdr: *const msghdr,
+                       cmsg: *const cmsghdr) -> *mut cmsghdr {
+        if ((*cmsg).cmsg_len as usize) < ::mem::size_of::<cmsghdr>() {
+            return 0 as *mut cmsghdr;
+        };
+        let next = (cmsg as usize +
+                    CMSG_ALIGN((*cmsg).cmsg_len as usize))
+            as *mut cmsghdr;
+        let max = (*mhdr).msg_control as usize
+            + (*mhdr).msg_controllen as usize;
+        if (next.offset(1)) as usize > max ||
+            next as usize + CMSG_ALIGN((*next).cmsg_len as usize) > max
+        {
+            0 as *mut cmsghdr
+        } else {
+            next as *mut cmsghdr
+        }
+    }
+
+}
+
+extern {
+    pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
+    pub fn openpty(amaster: *mut ::c_int,
+                aslave: *mut ::c_int,
+                name: *mut ::c_char,
+                termp: *mut termios,
+                winp: *mut ::winsize) -> ::c_int;
+    pub fn setns(fd: ::c_int, nstype: ::c_int) -> ::c_int;
+    pub fn pwritev(fd: ::c_int,
+                   iov: *const ::iovec,
+                   iovcnt: ::c_int,
+                   offset: ::off_t) -> ::ssize_t;
+    pub fn preadv(fd: ::c_int,
+                  iov: *const ::iovec,
+                  iovcnt: ::c_int,
+                  offset: ::off_t) -> ::ssize_t;
+}
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    } else {
+        mod no_align;
+        pub use self::no_align::*;
+    }
+}
diff --git a/libc/src/unix/uclibc/arm/no_align.rs b/libc/src/unix/uclibc/arm/no_align.rs
new file mode 100644
index 0000000..e32bf67
--- /dev/null
+++ b/libc/src/unix/uclibc/arm/no_align.rs
@@ -0,0 +1,10 @@
+s! {
+    // FIXME this is actually a union
+    pub struct sem_t {
+        #[cfg(target_pointer_width = "32")]
+        __size: [::c_char; 16],
+        #[cfg(target_pointer_width = "64")]
+        __size: [::c_char; 32],
+        __align: [::c_long; 0],
+    }
+}
diff --git a/libc/src/unix/uclibc/mips/mips32/align.rs b/libc/src/unix/uclibc/mips/mips32/align.rs
new file mode 100644
index 0000000..4a0e074
--- /dev/null
+++ b/libc/src/unix/uclibc/mips/mips32/align.rs
@@ -0,0 +1,13 @@
+s! {
+    // FIXME this is actually a union
+    #[cfg_attr(target_pointer_width = "32",
+               repr(align(4)))]
+    #[cfg_attr(target_pointer_width = "64",
+               repr(align(8)))]
+    pub struct sem_t {
+        #[cfg(target_pointer_width = "32")]
+        __size: [::c_char; 16],
+        #[cfg(target_pointer_width = "64")]
+        __size: [::c_char; 32],
+    }
+}
diff --git a/libc/src/unix/uclibc/mips/mips32.rs b/libc/src/unix/uclibc/mips/mips32/mod.rs
index dcbfcf8..410ab70 100644
--- a/libc/src/unix/uclibc/mips/mips32.rs
+++ b/libc/src/unix/uclibc/mips/mips32/mod.rs
@@ -220,20 +220,6 @@ s! {
         pub mem_unit: ::c_uint,
         pub _f: [::c_char; 8],
     }
-
-    // FIXME this is actually a union
-    #[cfg_attr(all(feature = "align", target_pointer_width = "32"),
-               repr(align(4)))]
-    #[cfg_attr(all(feature = "align", target_pointer_width = "64"),
-               repr(align(8)))]
-    pub struct sem_t {
-        #[cfg(target_pointer_width = "32")]
-        __size: [::c_char; 16],
-        #[cfg(target_pointer_width = "64")]
-        __size: [::c_char; 32],
-        #[cfg(not(feature = "align"))]
-        __align: [::c_long; 0],
-    }
 }
 
 pub const __SIZEOF_PTHREAD_CONDATTR_T: usize = 4;
@@ -261,7 +247,6 @@ pub const SYS_mknod: ::c_long = 4000 +  14;
 pub const SYS_chmod: ::c_long = 4000 +  15;
 pub const SYS_lchown: ::c_long = 4000 +  16;
 pub const SYS_break: ::c_long = 4000 +  17;
-pub const SYS_unused18: ::c_long = 4000 +  18;
 pub const SYS_lseek: ::c_long = 4000 +  19;
 pub const SYS_getpid: ::c_long = 4000 +  20;
 pub const SYS_mount: ::c_long = 4000 +  21;
@@ -271,7 +256,6 @@ pub const SYS_getuid: ::c_long = 4000 +  24;
 pub const SYS_stime: ::c_long = 4000 +  25;
 pub const SYS_ptrace: ::c_long = 4000 +  26;
 pub const SYS_alarm: ::c_long = 4000 +  27;
-pub const SYS_unused28: ::c_long = 4000 +  28;
 pub const SYS_pause: ::c_long = 4000 +  29;
 pub const SYS_utime: ::c_long = 4000 +  30;
 pub const SYS_stty: ::c_long = 4000 +  31;
@@ -302,7 +286,6 @@ pub const SYS_fcntl: ::c_long = 4000 +  55;
 pub const SYS_mpx: ::c_long = 4000 +  56;
 pub const SYS_setpgid: ::c_long = 4000 +  57;
 pub const SYS_ulimit: ::c_long = 4000 +  58;
-pub const SYS_unused59: ::c_long = 4000 +  59;
 pub const SYS_umask: ::c_long = 4000 +  60;
 pub const SYS_chroot: ::c_long = 4000 +  61;
 pub const SYS_ustat: ::c_long = 4000 +  62;
@@ -325,9 +308,7 @@ pub const SYS_gettimeofday: ::c_long = 4000 +  78;
 pub const SYS_settimeofday: ::c_long = 4000 +  79;
 pub const SYS_getgroups: ::c_long = 4000 +  80;
 pub const SYS_setgroups: ::c_long = 4000 +  81;
-pub const SYS_reserved82: ::c_long = 4000 +  82;
 pub const SYS_symlink: ::c_long = 4000 +  83;
-pub const SYS_unused84: ::c_long = 4000 +  84;
 pub const SYS_readlink: ::c_long = 4000 +  85;
 pub const SYS_uselib: ::c_long = 4000 +  86;
 pub const SYS_swapon: ::c_long = 4000 +  87;
@@ -352,7 +333,6 @@ pub const SYS_getitimer: ::c_long = 4000 + 105;
 pub const SYS_stat: ::c_long = 4000 + 106;
 pub const SYS_lstat: ::c_long = 4000 + 107;
 pub const SYS_fstat: ::c_long = 4000 + 108;
-pub const SYS_unused109: ::c_long = 4000 + 109;
 pub const SYS_iopl: ::c_long = 4000 + 110;
 pub const SYS_vhangup: ::c_long = 4000 + 111;
 pub const SYS_idle: ::c_long = 4000 + 112;
@@ -393,7 +373,6 @@ pub const SYS_writev: ::c_long = 4000 + 146;
 pub const SYS_cacheflush: ::c_long = 4000 + 147;
 pub const SYS_cachectl: ::c_long = 4000 + 148;
 pub const SYS_sysmips: ::c_long = 4000 + 149;
-pub const SYS_unused150: ::c_long = 4000 + 150;
 pub const SYS_getsid: ::c_long = 4000 + 151;
 pub const SYS_fdatasync: ::c_long = 4000 + 152;
 pub const SYS__sysctl: ::c_long = 4000 + 153;
@@ -464,7 +443,6 @@ pub const SYS_mincore: ::c_long = 4000 + 217;
 pub const SYS_madvise: ::c_long = 4000 + 218;
 pub const SYS_getdents64: ::c_long = 4000 + 219;
 pub const SYS_fcntl64: ::c_long = 4000 + 220;
-pub const SYS_reserved221: ::c_long = 4000 + 221;
 pub const SYS_gettid: ::c_long = 4000 + 222;
 pub const SYS_readahead: ::c_long = 4000 + 223;
 pub const SYS_setxattr: ::c_long = 4000 + 224;
@@ -624,7 +602,7 @@ extern {
                      sz: ::c_int) -> ::c_int;
     pub fn glob64(pattern: *const ::c_char,
                   flags: ::c_int,
-                  errfunc: ::dox::Option<extern fn(epath: *const ::c_char,
+                  errfunc: ::Option<extern fn(epath: *const ::c_char,
                                                    errno: ::c_int)
                                                    -> ::c_int>,
                   pglob: *mut glob64_t) -> ::c_int;
@@ -637,3 +615,13 @@ extern {
                                        cpusetsize: ::size_t,
                                        cpuset: *const ::cpu_set_t) -> ::c_int;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    } else {
+        mod no_align;
+        pub use self::no_align::*;
+    }
+}
diff --git a/libc/src/unix/uclibc/mips/mips32/no_align.rs b/libc/src/unix/uclibc/mips/mips32/no_align.rs
new file mode 100644
index 0000000..e32bf67
--- /dev/null
+++ b/libc/src/unix/uclibc/mips/mips32/no_align.rs
@@ -0,0 +1,10 @@
+s! {
+    // FIXME this is actually a union
+    pub struct sem_t {
+        #[cfg(target_pointer_width = "32")]
+        __size: [::c_char; 16],
+        #[cfg(target_pointer_width = "64")]
+        __size: [::c_char; 32],
+        __align: [::c_long; 0],
+    }
+}
diff --git a/libc/src/unix/uclibc/mips/mips64/align.rs b/libc/src/unix/uclibc/mips/mips64/align.rs
new file mode 100644
index 0000000..21e2190
--- /dev/null
+++ b/libc/src/unix/uclibc/mips/mips64/align.rs
@@ -0,0 +1,10 @@
+s! {
+    // FIXME this is actually a union
+    #[cfg_attr(target_pointer_width = "32",
+               repr(align(4)))]
+    #[cfg_attr(target_pointer_width = "64",
+               repr(align(8)))]
+    pub struct sem_t {
+        __size: [::c_char; 32],
+    }
+}
diff --git a/libc/src/unix/uclibc/mips/mips64.rs b/libc/src/unix/uclibc/mips/mips64/mod.rs
index e35938b..d80762e 100644
--- a/libc/src/unix/uclibc/mips/mips64.rs
+++ b/libc/src/unix/uclibc/mips/mips64/mod.rs
@@ -186,17 +186,6 @@ s! {
         pub mem_unit: ::c_uint,
         pub _f: [::c_char; 0],
     }
-
-    // FIXME this is actually a union
-    #[cfg_attr(all(feature = "align", target_pointer_width = "32"),
-               repr(align(4)))]
-    #[cfg_attr(all(feature = "align", target_pointer_width = "64"),
-               repr(align(8)))]
-    pub struct sem_t {
-        __size: [::c_char; 32],
-        #[cfg(not(feature = "align"))]
-        __align: [::c_long; 0],
-    }
 }
 
 pub const __SIZEOF_PTHREAD_CONDATTR_T: usize = 4;
@@ -212,3 +201,13 @@ pub const SYS_gettid: ::c_long = 5178;   // Valid for n64
 extern {
     pub fn ioctl(fd: ::c_int, request: ::c_ulong, ...) -> ::c_int;
 }
+
+cfg_if! {
+    if #[cfg(libc_align)] {
+        mod align;
+        pub use self::align::*;
+    } else {
+        mod no_align;
+        pub use self::no_align::*;
+    }
+}
diff --git a/libc/src/unix/uclibc/mips/mips64/no_align.rs b/libc/src/unix/uclibc/mips/mips64/no_align.rs
new file mode 100644
index 0000000..ee57ea8
--- /dev/null
+++ b/libc/src/unix/uclibc/mips/mips64/no_align.rs
@@ -0,0 +1,8 @@
+s! {
+    // FIXME this is actually a union
+    pub struct sem_t {
+        __size: [::c_char; 32],
+        __align: [::c_long; 0],
+    }
+}
+
diff --git a/libc/src/unix/uclibc/mod.rs b/libc/src/unix/uclibc/mod.rs
index c04c22a..e3baba0 100644
--- a/libc/src/unix/uclibc/mod.rs
+++ b/libc/src/unix/uclibc/mod.rs
@@ -1,5 +1,3 @@
-use dox::{mem, Option};
-
 pub type sa_family_t = u16;
 pub type pthread_key_t = ::c_uint;
 pub type speed_t = ::c_uint;
@@ -24,11 +22,30 @@ pub type nfds_t = ::c_ulong;
 pub type nl_item = ::c_int;
 pub type idtype_t = ::c_uint;
 
+#[cfg_attr(feature = "extra_traits", derive(Debug))]
 pub enum fpos64_t {} // TODO: fill this out with a struct
+impl ::Copy for fpos64_t {}
+impl ::Clone for fpos64_t {
+    fn clone(&self) -> fpos64_t { *self }
+}
 
+#[cfg_attr(feature = "extra_traits", derive(Debug))]
 pub enum timezone {}
+impl ::Copy for timezone {}
+impl ::Clone for timezone {
+    fn clone(&self) -> timezone { *self }
+}
 
 s! {
+    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 {
         pub sa_family: sa_family_t,
         pub sa_data: [::c_char; 14],
@@ -49,20 +66,6 @@ s! {
         pub sin6_scope_id: u32,
     }
 
-    pub struct sockaddr_un {
-        pub sun_family: sa_family_t,
-        pub sun_path: [::c_char; 108]
-    }
-
-    pub struct sockaddr_storage {
-        pub ss_family: sa_family_t,
-        __ss_align: ::size_t,
-        #[cfg(target_pointer_width = "32")]
-        __ss_pad2: [u8; 128 - 2 * 4],
-        #[cfg(target_pointer_width = "64")]
-        __ss_pad2: [u8; 128 - 2 * 8],
-    }
-
     pub struct addrinfo {
         pub ai_flags: ::c_int,
         pub ai_family: ::c_int,
@@ -123,23 +126,6 @@ s! {
         pub dli_saddr: *mut ::c_void,
     }
 
-    #[cfg_attr(any(all(target_arch = "x86",
-                   target_arch = "x86_64")),
-               repr(packed))]
-    pub struct epoll_event {
-        pub events: ::uint32_t,
-        pub u64: ::uint64_t,
-    }
-
-    pub struct utsname {
-        pub sysname: [::c_char; 65],
-        pub nodename: [::c_char; 65],
-        pub release: [::c_char; 65],
-        pub version: [::c_char; 65],
-        pub machine: [::c_char; 65],
-        pub domainname: [::c_char; 65]
-    }
-
     pub struct lconv {
         pub decimal_point: *mut ::c_char,
         pub thousands_sep: *mut ::c_char,
@@ -180,22 +166,6 @@ s! {
         __unused1: [::c_int; 12]
     }
 
-    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; 256],
-    }
-
-    pub struct dirent64 {
-        pub d_ino: ::ino64_t,
-        pub d_off: ::off64_t,
-        pub d_reclen: ::c_ushort,
-        pub d_type: ::c_uchar,
-        pub d_name: [::c_char; 256],
-    }
-
     pub struct rlimit64 {
         pub rlim_cur: rlim64_t,
         pub rlim_max: rlim64_t,
@@ -224,103 +194,11 @@ s! {
         pub ifa_data: *mut ::c_void
     }
 
-    #[cfg_attr(all(feature = "align",
-                   target_pointer_width = "32",
-                   any(target_arch = "mips",
-                       target_arch = "arm",
-                       target_arch = "powerpc")),
-               repr(align(4)))]
-    #[cfg_attr(all(feature = "align",
-                   any(target_pointer_width = "64",
-                       not(any(target_arch = "mips",
-                               target_arch = "arm",
-                               target_arch = "powerpc")))),
-               repr(align(8)))]
-    pub struct pthread_mutex_t {
-        #[cfg(all(not(feature = "align"),
-                  any(target_arch = "mips",
-                      target_arch = "arm",
-                      target_arch = "powerpc")))]
-        __align: [::c_long; 0],
-        #[cfg(not(any(feature = "align",
-                      target_arch = "mips",
-                      target_arch = "arm",
-                      target_arch = "powerpc")))]
-        __align: [::c_longlong; 0],
-        size: [u8; __SIZEOF_PTHREAD_MUTEX_T],
-    }
-
-    #[cfg_attr(all(feature = "align",
-                   target_pointer_width = "32",
-                   any(target_arch = "mips",
-                       target_arch = "arm",
-                       target_arch = "powerpc")),
-               repr(align(4)))]
-    #[cfg_attr(all(feature = "align",
-                   any(target_pointer_width = "64",
-                       not(any(target_arch = "mips",
-                               target_arch = "arm",
-                               target_arch = "powerpc")))),
-               repr(align(8)))]
-    pub struct pthread_rwlock_t {
-        #[cfg(all(not(feature = "align"),
-                  any(target_arch = "mips",
-                      target_arch = "arm",
-                      target_arch = "powerpc")))]
-        __align: [::c_long; 0],
-        #[cfg(not(any(feature = "align",
-                      target_arch = "mips",
-                      target_arch = "arm",
-                      target_arch = "powerpc")))]
-        __align: [::c_longlong; 0],
-        size: [u8; __SIZEOF_PTHREAD_RWLOCK_T],
-    }
-
-    #[cfg_attr(all(feature = "align",
-                   any(target_pointer_width = "32",
-                       target_arch = "x86_64", target_arch = "powerpc64",
-                       target_arch = "mips64", target_arch = "s390x",
-                       target_arch = "sparc64")),
-               repr(align(4)))]
-    #[cfg_attr(all(feature = "align",
-                   not(any(target_pointer_width = "32",
-                           target_arch = "x86_64", target_arch = "powerpc64",
-                           target_arch = "mips64", target_arch = "s390x",
-                           target_arch = "sparc64"))),
-               repr(align(8)))]
-    pub struct pthread_mutexattr_t {
-        #[cfg(all(not(feature = "align"),
-                  any(target_arch = "x86_64", target_arch = "powerpc64",
-                      target_arch = "mips64", target_arch = "s390x",
-                      target_arch = "sparc64")))]
-        __align: [::c_int; 0],
-        #[cfg(all(not(feature = "align"),
-                  not(any(target_arch = "x86_64", target_arch = "powerpc64",
-                          target_arch = "mips64", target_arch = "s390x",
-                          target_arch = "sparc64"))))]
-        __align: [::c_long; 0],
-        size: [u8; __SIZEOF_PTHREAD_MUTEXATTR_T],
-    }
-
     pub struct pthread_rwlockattr_t {
         __lockkind: ::c_int,
         __pshared: ::c_int,
     }
 
-    #[cfg_attr(feature = "align", repr(align(8)))]
-    pub struct pthread_cond_t {
-        #[cfg(not(feature = "align"))]
-        __align: [::c_longlong; 0],
-        size: [u8; __SIZEOF_PTHREAD_COND_T],
-    }
-
-    #[cfg_attr(feature = "align", repr(align(4)))]
-    pub struct pthread_condattr_t {
-        #[cfg(not(feature = "align"))]
-        __align: [::c_int; 0],
-        size: [u8; __SIZEOF_PTHREAD_CONDATTR_T],
-    }
-
     pub struct passwd {
         pub pw_name: *mut ::c_char,
         pub pw_passwd: *mut ::c_char,
@@ -436,6 +314,62 @@ s! {
     }
 }
 
+s_no_extra_traits! {
+    #[cfg_attr(
+        any(target_arch = "x86", target_arch = "x86_64"),
+        repr(packed)
+    )]
+    #[allow(missing_debug_implementations)]
+    pub struct epoll_event {
+        pub events: ::uint32_t,
+        pub u64: ::uint64_t,
+    }
+
+    #[allow(missing_debug_implementations)]
+    pub struct sockaddr_un {
+        pub sun_family: sa_family_t,
+        pub sun_path: [::c_char; 108]
+    }
+
+    #[allow(missing_debug_implementations)]
+    pub struct sockaddr_storage {
+        pub ss_family: sa_family_t,
+        __ss_align: ::size_t,
+        #[cfg(target_pointer_width = "32")]
+        __ss_pad2: [u8; 128 - 2 * 4],
+        #[cfg(target_pointer_width = "64")]
+        __ss_pad2: [u8; 128 - 2 * 8],
+    }
+
+    #[allow(missing_debug_implementations)]
+    pub struct utsname {
+        pub sysname: [::c_char; 65],
+        pub nodename: [::c_char; 65],
+        pub release: [::c_char; 65],
+        pub version: [::c_char; 65],
+        pub machine: [::c_char; 65],
+        pub domainname: [::c_char; 65]
+    }
+
+    #[allow(missing_debug_implementations)]
+    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; 256],
+    }
+
+    #[allow(missing_debug_implementations)]
+    pub struct dirent64 {
+        pub d_ino: ::ino64_t,
+        pub d_off: ::off64_t,
+        pub d_reclen: ::c_ushort,
+        pub d_type: ::c_uchar,
+        pub d_name: [::c_char; 256],
+    }
+}
+
 // intentionally not public, only used for fd_set
 cfg_if! {
     if #[cfg(target_pointer_width = "32")] {
@@ -1459,20 +1393,20 @@ pub const AF_MAX: ::c_int = 39;
 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;
+        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;
+        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;
+        let size = ::mem::size_of_val(&(*set).fds_bits[0]) * 8;
         (*set).fds_bits[fd / size] |= 1 << (fd % size);
         return
     }
@@ -1522,21 +1456,23 @@ f! {
     }
 
     pub fn CPU_SET(cpu: usize, cpuset: &mut cpu_set_t) -> () {
-        let size_in_bits = 8 * mem::size_of_val(&cpuset.bits[0]); // 32, 64 etc
+        let size_in_bits
+            = 8 * ::mem::size_of_val(&cpuset.bits[0]); // 32, 64 etc
         let (idx, offset) = (cpu / size_in_bits, cpu % size_in_bits);
         cpuset.bits[idx] |= 1 << offset;
         ()
     }
 
     pub fn CPU_CLR(cpu: usize, cpuset: &mut cpu_set_t) -> () {
-        let size_in_bits = 8 * mem::size_of_val(&cpuset.bits[0]); // 32, 64 etc
+        let size_in_bits
+            = 8 * ::mem::size_of_val(&cpuset.bits[0]); // 32, 64 etc
         let (idx, offset) = (cpu / size_in_bits, cpu % size_in_bits);
         cpuset.bits[idx] &= !(1 << offset);
         ()
     }
 
     pub fn CPU_ISSET(cpu: usize, cpuset: &cpu_set_t) -> bool {
-        let size_in_bits = 8 * mem::size_of_val(&cpuset.bits[0]);
+        let size_in_bits = 8 * ::mem::size_of_val(&cpuset.bits[0]);
         let (idx, offset) = (cpu / size_in_bits, cpu % size_in_bits);
         0 != (cpuset.bits[idx] & (1 << offset))
     }
@@ -1551,6 +1487,12 @@ f! {
 }
 
 extern {
+    pub fn sem_destroy(sem: *mut sem_t) -> ::c_int;
+    pub fn sem_init(sem: *mut sem_t,
+                    pshared: ::c_int,
+                    value: ::c_uint)
+                    -> ::c_int;
+
     pub fn abs(i: ::c_int) -> ::c_int;
     pub fn atof(s: *const ::c_char) -> ::c_double;
     pub fn labs(i: ::c_long) -> ::c_long;
@@ -1857,7 +1799,7 @@ extern {
 
     pub fn glob(pattern: *const c_char,
                 flags: ::c_int,
-                errfunc: Option<extern fn(epath: *const c_char,
+                errfunc: ::Option<extern fn(epath: *const c_char,
                                           errno: ::c_int) -> ::c_int>,
                 pglob: *mut ::glob_t) -> ::c_int;
     pub fn globfree(pglob: *mut ::glob_t);
@@ -1895,7 +1837,7 @@ extern {
     pub fn recvmsg(fd: ::c_int, msg: *mut ::msghdr, flags: ::c_int)
                    -> ::ssize_t;
     #[cfg_attr(target_os = "solaris", link_name = "__posix_getgrgid_r")]
-    pub fn getgrgid_r(uid: ::uid_t,
+    pub fn getgrgid_r(gid: ::gid_t,
                       grp: *mut ::group,
                       buf: *mut ::c_char,
                       buflen: ::size_t,
@@ -1941,9 +1883,9 @@ extern {
     #[cfg_attr(target_os = "solaris", link_name = "__posix_sigwait")]
     pub fn sigwait(set: *const sigset_t,
                    sig: *mut ::c_int) -> ::c_int;
-    pub fn pthread_atfork(prepare: Option<unsafe extern fn()>,
-                          parent: Option<unsafe extern fn()>,
-                          child: Option<unsafe extern fn()>) -> ::c_int;
+    pub fn pthread_atfork(prepare: ::Option<unsafe extern fn()>,
+                          parent: ::Option<unsafe extern fn()>,
+                          child: ::Option<unsafe extern fn()>) -> ::c_int;
     pub fn pthread_create(native: *mut ::pthread_t,
                           attr: *const ::pthread_attr_t,
                           f: extern fn(*mut ::c_void) -> *mut ::c_void,
@@ -1963,8 +1905,22 @@ cfg_if! {
     } else if #[cfg(target_arch = "x86_64")] {
         mod x86_64;
         pub use self::x86_64::*;
+    } else if #[cfg(target_arch = "arm")] {
+        mod arm;
+        pub use self::arm::*;
     } else {
         pub use unsupported_target;
     }
 }
 
+cfg_if! {
+    if #[cfg(libc_align)] {
+        #[macro_use]
+        mod align;
+    } else {
+        #[macro_use]
+        mod no_align;
+    }
+}
+
+expand_align!();
diff --git a/libc/src/unix/uclibc/no_align.rs b/libc/src/unix/uclibc/no_align.rs
new file mode 100644
index 0000000..a73dbde
--- /dev/null
+++ b/libc/src/unix/uclibc/no_align.rs
@@ -0,0 +1,53 @@
+macro_rules! expand_align {
+    () => {
+        s! {
+            pub struct pthread_mutex_t {
+                #[cfg(any(target_arch = "mips",
+                          target_arch = "arm",
+                          target_arch = "powerpc"))]
+                __align: [::c_long; 0],
+                #[cfg(any(libc_align,
+                          target_arch = "mips",
+                          target_arch = "arm",
+                          target_arch = "powerpc"))]
+                __align: [::c_longlong; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_MUTEX_T],
+            }
+
+            pub struct pthread_rwlock_t {
+                #[cfg(any(target_arch = "mips",
+                          target_arch = "arm",
+                          target_arch = "powerpc"))]
+                __align: [::c_long; 0],
+                #[cfg(not(any(
+                    target_arch = "mips",
+                    target_arch = "arm",
+                    target_arch = "powerpc")))]
+                __align: [::c_longlong; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_RWLOCK_T],
+            }
+
+            pub struct pthread_mutexattr_t {
+                #[cfg(any(target_arch = "x86_64", target_arch = "powerpc64",
+                          target_arch = "mips64", target_arch = "s390x",
+                          target_arch = "sparc64"))]
+                __align: [::c_int; 0],
+                #[cfg(not(any(target_arch = "x86_64", target_arch = "powerpc64",
+                              target_arch = "mips64", target_arch = "s390x",
+                              target_arch = "sparc64")))]
+                __align: [::c_long; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_MUTEXATTR_T],
+            }
+
+            pub struct pthread_cond_t {
+                __align: [::c_longlong; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_COND_T],
+            }
+
+            pub struct pthread_condattr_t {
+                __align: [::c_int; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_CONDATTR_T],
+            }
+        }
+    }
+}
diff --git a/libc/src/unix/uclibc/x86_64/align.rs b/libc/src/unix/uclibc/x86_64/align.rs
new file mode 100644
index 0000000..8d4bbd5
--- /dev/null
+++ b/libc/src/unix/uclibc/x86_64/align.rs
@@ -0,0 +1,77 @@
+macro_rules! expand_align {
+    () => {
+        s! {
+            #[cfg_attr(target_pointer_width = "32",
+                       repr(align(4)))]
+            #[cfg_attr(target_pointer_width = "64",
+                       repr(align(8)))]
+            pub struct sem_t { // ToDo
+                #[cfg(target_pointer_width = "32")]
+                __size: [::c_char; 16],
+                #[cfg(target_pointer_width = "64")]
+                __size: [::c_char; 32],
+            }
+
+            #[cfg_attr(any(target_pointer_width = "32",
+                           target_arch = "x86_64",
+                           target_arch = "powerpc64",
+                           target_arch = "mips64",
+                           target_arch = "s390x",
+                           target_arch = "sparc64"),
+                       repr(align(4)))]
+            #[cfg_attr(not(any(target_pointer_width = "32",
+                               target_arch = "x86_64",
+                               target_arch = "powerpc64",
+                               target_arch = "mips64",
+                               target_arch = "s390x",
+                               target_arch = "sparc64")),
+                       repr(align(8)))]
+            pub struct pthread_mutexattr_t { // ToDo
+                size: [u8; ::__SIZEOF_PTHREAD_MUTEXATTR_T],
+            }
+
+            #[repr(align(4))]
+            pub struct pthread_condattr_t { // ToDo
+                size: [u8; ::__SIZEOF_PTHREAD_CONDATTR_T],
+            }
+        }
+
+        s_no_extra_traits! {
+            #[cfg_attr(all(target_pointer_width = "32",
+                           any(target_arch = "mips",
+                               target_arch = "arm",
+                               target_arch = "powerpc")),
+                       repr(align(4)))]
+            #[cfg_attr(all(any(target_pointer_width = "64",
+                               not(any(target_arch = "mips",
+                                       target_arch = "arm",
+                                       target_arch = "powerpc")))),
+                       repr(align(8)))]
+            #[allow(missing_debug_implementations)]
+            pub struct pthread_mutex_t { // ToDo
+                size: [u8; ::__SIZEOF_PTHREAD_MUTEX_T],
+            }
+
+            #[repr(align(8))]
+            #[allow(missing_debug_implementations)]
+            pub struct pthread_cond_t { // ToDo
+                size: [u8; ::__SIZEOF_PTHREAD_COND_T],
+            }
+
+            #[cfg_attr(all(target_pointer_width = "32",
+                           any(target_arch = "mips",
+                               target_arch = "arm",
+                               target_arch = "powerpc")),
+                       repr(align(4)))]
+            #[cfg_attr(any(target_pointer_width = "64",
+                           not(any(target_arch = "mips",
+                                   target_arch = "arm",
+                                   target_arch = "powerpc"))),
+                       repr(align(8)))]
+            #[allow(missing_debug_implementations)]
+            pub struct pthread_rwlock_t { // ToDo
+                size: [u8; ::__SIZEOF_PTHREAD_RWLOCK_T],
+            }
+        }
+    }
+}
diff --git a/libc/src/unix/uclibc/x86_64/l4re.rs b/libc/src/unix/uclibc/x86_64/l4re.rs
index 4f5811d..16ec0ef 100644
--- a/libc/src/unix/uclibc/x86_64/l4re.rs
+++ b/libc/src/unix/uclibc/x86_64/l4re.rs
@@ -27,6 +27,7 @@ s! {
 }
 
 #[cfg(target_os = "l4re")]
+#[allow(missing_debug_implementations)]
 pub struct pthread_attr_t {
     pub __detachstate: ::c_int,
     pub __schedpolicy: ::c_int,
diff --git a/libc/src/unix/uclibc/x86_64/mod.rs b/libc/src/unix/uclibc/x86_64/mod.rs
index bc6571a..a8bb079 100644
--- a/libc/src/unix/uclibc/x86_64/mod.rs
+++ b/libc/src/unix/uclibc/x86_64/mod.rs
@@ -1,5 +1,4 @@
 //! Definitions for uclibc on 64bit systems
-//!
 pub type blkcnt_t = i64;
 pub type blksize_t = i64;
 pub type clock_t = i64;
@@ -20,25 +19,7 @@ pub type suseconds_t = ::c_long;
 pub type time_t = ::c_int;
 pub type wchar_t = ::c_int;
 
-pub type nfds_t = ::c_ulong;
-
 s! {
-    pub struct dirent {
-        pub d_ino: ::ino64_t,
-        pub d_off: ::off64_t,
-        pub d_reclen: u16,
-        pub d_type: u8,
-        pub d_name: [::c_char; 256],
-    }
-
-    pub struct dirent64 {
-        pub d_ino: ::ino64_t,
-        pub d_off: ::off64_t,
-        pub d_reclen: u16,
-        pub d_type: u8,
-        pub d_name: [::c_char; 256],
-    }
-
     pub struct ipc_perm {
         pub __key: ::key_t,
         pub uid: ::uid_t,
@@ -133,7 +114,7 @@ s! {
 //
 //    pub struct in6_addr {
 //        pub s6_addr: [u8; 16],
-//        #[cfg(not(feature = "align"))]
+//        #[cfg(not(libc_align))]
 //        __align: [u32; 0],
 //    }
 
@@ -205,111 +186,6 @@ s! {
         pub c_cc: [::cc_t; ::NCCS],
     }
 
-    #[cfg_attr(all(feature = "align", target_pointer_width = "32"),
-               repr(align(4)))]
-    #[cfg_attr(all(feature = "align", target_pointer_width = "64"),
-               repr(align(8)))]
-    pub struct sem_t { // ToDo
-        #[cfg(target_pointer_width = "32")]
-        __size: [::c_char; 16],
-        #[cfg(target_pointer_width = "64")]
-        __size: [::c_char; 32],
-        #[cfg(not(feature = "align"))]
-        __align: [::c_long; 0],
-    }
-
-    #[cfg_attr(all(feature = "align",
-                   target_pointer_width = "32",
-                   any(target_arch = "mips",
-                       target_arch = "arm",
-                       target_arch = "powerpc")),
-               repr(align(4)))]
-    #[cfg_attr(all(feature = "align",
-                   any(target_pointer_width = "64",
-                       not(any(target_arch = "mips",
-                               target_arch = "arm",
-                               target_arch = "powerpc")))),
-               repr(align(8)))]
-    pub struct pthread_mutex_t { // ToDo
-        #[cfg(all(not(feature = "align"),
-                  any(target_arch = "mips",
-                      target_arch = "arm",
-                      target_arch = "powerpc")))]
-        __align: [::c_long; 0],
-        #[cfg(not(any(feature = "align",
-                      target_arch = "mips",
-                      target_arch = "arm",
-                      target_arch = "powerpc")))]
-        __align: [::c_longlong; 0],
-        size: [u8; __SIZEOF_PTHREAD_MUTEX_T],
-    }
-
-    #[cfg_attr(all(feature = "align",
-                   any(target_pointer_width = "32",
-                       target_arch = "x86_64", target_arch = "powerpc64",
-                       target_arch = "mips64", target_arch = "s390x",
-                       target_arch = "sparc64")),
-               repr(align(4)))]
-    #[cfg_attr(all(feature = "align",
-                   not(any(target_pointer_width = "32",
-                           target_arch = "x86_64", target_arch = "powerpc64",
-                           target_arch = "mips64", target_arch = "s390x",
-                           target_arch = "sparc64"))),
-               repr(align(8)))]
-    pub struct pthread_mutexattr_t { // ToDo
-        #[cfg(all(not(feature = "align"),
-                  any(target_arch = "x86_64", target_arch = "powerpc64",
-                      target_arch = "mips64", target_arch = "s390x",
-                      target_arch = "sparc64")))]
-        __align: [::c_int; 0],
-        #[cfg(all(not(feature = "align"),
-                  not(any(target_arch = "x86_64", target_arch = "powerpc64",
-                          target_arch = "mips64", target_arch = "s390x",
-                          target_arch = "sparc64"))))]
-        __align: [::c_long; 0],
-        size: [u8; __SIZEOF_PTHREAD_MUTEXATTR_T],
-    }
-
-    #[cfg_attr(feature = "align", repr(align(8)))]
-    pub struct pthread_cond_t { // ToDo
-        #[cfg(not(feature = "align"))]
-        __align: [::c_longlong; 0],
-        size: [u8; __SIZEOF_PTHREAD_COND_T],
-    }
-
-    #[cfg_attr(feature = "align", repr(align(4)))]
-    pub struct pthread_condattr_t { // ToDo
-        #[cfg(not(feature = "align"))]
-        __align: [::c_int; 0],
-        size: [u8; __SIZEOF_PTHREAD_CONDATTR_T],
-    }
-
-    #[cfg_attr(all(feature = "align",
-                   target_pointer_width = "32",
-                   any(target_arch = "mips",
-                       target_arch = "arm",
-                       target_arch = "powerpc")),
-               repr(align(4)))]
-    #[cfg_attr(all(feature = "align",
-                   any(target_pointer_width = "64",
-                       not(any(target_arch = "mips",
-                               target_arch = "arm",
-                               target_arch = "powerpc")))),
-               repr(align(8)))]
-    pub struct pthread_rwlock_t { // ToDo
-        #[cfg(all(not(feature = "align"),
-                  any(target_arch = "mips",
-                      target_arch = "arm",
-                      target_arch = "powerpc")))]
-        __align: [::c_long; 0],
-        #[cfg(not(any(feature = "align",
-                      target_arch = "mips",
-                      target_arch = "arm",
-                      target_arch = "powerpc")))]
-        __align: [::c_longlong; 0],
-        size: [u8; __SIZEOF_PTHREAD_RWLOCK_T],
-    }
-
     pub struct sigset_t { // ToDo
         __val: [::c_ulong; 16],
     }
@@ -360,6 +236,25 @@ s! {
     }
 }
 
+s_no_extra_traits! {
+    #[allow(missing_debug_implementations)]
+    pub struct dirent {
+        pub d_ino: ::ino64_t,
+        pub d_off: ::off64_t,
+        pub d_reclen: u16,
+        pub d_type: u8,
+        pub d_name: [::c_char; 256],
+    }
+    #[allow(missing_debug_implementations)]
+    pub struct dirent64 {
+        pub d_ino: ::ino64_t,
+        pub d_off: ::off64_t,
+        pub d_reclen: u16,
+        pub d_type: u8,
+        pub d_name: [::c_char; 256],
+    }
+}
+
 // constants
 pub const EADDRINUSE: ::c_int = 98; // Address already in use
 pub const EADDRNOTAVAIL: ::c_int = 99; // Cannot assign requested address
@@ -380,7 +275,6 @@ pub const O_NONBLOCK: ::c_int = 04000;
 pub const O_TRUNC: ::c_int = 01000;
 pub const NCCS: usize = 32;
 pub const SIG_SETMASK: ::c_int = 2; // Set the set of blocked signals
-pub const PTHREAD_STACK_MIN: usize = 16384;
 pub const __SIZEOF_PTHREAD_MUTEX_T: usize = 40;
 pub const __SIZEOF_PTHREAD_MUTEXATTR_T: usize = 4;
 pub const SO_BROADCAST: ::c_int = 6;
@@ -391,19 +285,11 @@ pub const SOL_SOCKET: ::c_int = 1;
 pub const SO_RCVTIMEO: ::c_int = 20;
 pub const SO_REUSEADDR: ::c_int = 2;
 pub const SO_SNDTIMEO: ::c_int = 21;
-pub const PTHREAD_MUTEX_NORMAL: ::c_int = 0;
-pub const PTHREAD_MUTEX_RECURSIVE: ::c_int = 1;
-pub const PTHREAD_MUTEX_ERRORCHECK: ::c_int = 2;
-pub const PTHREAD_MUTEX_DEFAULT: ::c_int = PTHREAD_MUTEX_NORMAL;
 pub const RLIM_INFINITY: u64 = 0xffffffffffffffff;
 pub const __SIZEOF_PTHREAD_COND_T: usize = 48;
 pub const __SIZEOF_PTHREAD_CONDATTR_T: usize = 4;
 pub const __SIZEOF_PTHREAD_RWLOCK_T: usize = 56;
 
-extern {
-    pub fn memalign(align: ::size_t, size: ::size_t) -> *mut ::c_void;
-}
-
 cfg_if! {
     if #[cfg(target_os = "l4re")] {
         mod l4re;
@@ -414,3 +300,13 @@ cfg_if! {
     }
 }
 
+cfg_if! {
+    if #[cfg(libc_align)] {
+        #[macro_use]
+        mod align;
+    } else {
+        #[macro_use]
+        mod no_align;
+    }
+}
+expand_align!();
diff --git a/libc/src/unix/uclibc/x86_64/no_align.rs b/libc/src/unix/uclibc/x86_64/no_align.rs
new file mode 100644
index 0000000..422d78f
--- /dev/null
+++ b/libc/src/unix/uclibc/x86_64/no_align.rs
@@ -0,0 +1,59 @@
+macro_rules! expand_align {
+    () => {
+        s! {
+            pub struct sem_t { // ToDo
+                #[cfg(target_pointer_width = "32")]
+                __size: [::c_char; 16],
+                #[cfg(target_pointer_width = "64")]
+                __size: [::c_char; 32],
+                __align: [::c_long; 0],
+            }
+
+            pub struct pthread_mutex_t { // ToDo
+                #[cfg(any(target_arch = "mips",
+                          target_arch = "arm",
+                          target_arch = "powerpc"))]
+                __align: [::c_long; 0],
+                #[cfg(not(any(target_arch = "mips",
+                              target_arch = "arm",
+                              target_arch = "powerpc")))]
+                __align: [::c_longlong; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_MUTEX_T],
+            }
+
+            pub struct pthread_mutexattr_t { // ToDo
+                #[cfg(any(target_arch = "x86_64", target_arch = "powerpc64",
+                          target_arch = "mips64", target_arch = "s390x",
+                          target_arch = "sparc64"))]
+                __align: [::c_int; 0],
+                #[cfg(not(any(target_arch = "x86_64", target_arch = "powerpc64",
+                              target_arch = "mips64", target_arch = "s390x",
+                              target_arch = "sparc64")))]
+                __align: [::c_long; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_MUTEXATTR_T],
+            }
+
+            pub struct pthread_cond_t { // ToDo
+                __align: [::c_longlong; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_COND_T],
+            }
+
+            pub struct pthread_condattr_t { // ToDo
+                __align: [::c_int; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_CONDATTR_T],
+            }
+
+            pub struct pthread_rwlock_t { // ToDo
+                #[cfg(any(target_arch = "mips",
+                          target_arch = "arm",
+                          target_arch = "powerpc"))]
+                __align: [::c_long; 0],
+                #[cfg(not(any(target_arch = "mips",
+                              target_arch = "arm",
+                              target_arch = "powerpc")))]
+                __align: [::c_longlong; 0],
+                size: [u8; ::__SIZEOF_PTHREAD_RWLOCK_T],
+            }
+        }
+    }
+}
diff --git a/libc/src/unix/uclibc/x86_64/other.rs b/libc/src/unix/uclibc/x86_64/other.rs
index 1cc521d..481577c 100644
--- a/libc/src/unix/uclibc/x86_64/other.rs
+++ b/libc/src/unix/uclibc/x86_64/other.rs
@@ -2,3 +2,4 @@
 // separate module
 pub type pthread_t = ::c_ulong;
 
+pub const PTHREAD_STACK_MIN: usize = 16384;