diff --git a/src/lib.rs b/src/lib.rs
index d9bd318d1dfb6..dc8f8312072e5 100644
--- a/src/lib.rs
+++ b/src/lib.rs
@@ -139,6 +139,12 @@ cfg_if! {
 
         mod hermit;
         pub use hermit::*;
+    } else if #[cfg(target_os = "teeos")] {
+        mod fixed_width_ints;
+        pub use fixed_width_ints::*;
+
+        mod teeos;
+        pub use teeos::*;
     } else if #[cfg(all(target_env = "sgx", target_vendor = "fortanix"))] {
         mod fixed_width_ints;
         pub use fixed_width_ints::*;
diff --git a/src/teeos/mod.rs b/src/teeos/mod.rs
new file mode 100644
index 0000000000000..d939d8a89dcb4
--- /dev/null
+++ b/src/teeos/mod.rs
@@ -0,0 +1,1375 @@
+//! Libc bindings for teeos
+//!
+//! Apparently the loader just dynamically links it anyway, but fails
+//! when linking is explicitly requested.
+#![allow(non_camel_case_types)]
+#![allow(non_snake_case)]
+ 
+// only supported on Rust > 1.59, so we can directly reexport c_void from core.
+pub use core::ffi::c_void;
+ 
+pub type c_schar = i8;
+ 
+pub type c_uchar = u8;
+ 
+pub type c_short = i16;
+ 
+pub type c_ushort = u16;
+ 
+pub type c_int = i32;
+ 
+pub type c_uint = u32;
+ 
+pub type c_bool = i32;
+ 
+pub type c_float = f32;
+ 
+pub type c_double = f64;
+ 
+pub type c_longlong = i64;
+ 
+pub type c_ulonglong = u64;
+ 
+pub type intmax_t = i64;
+ 
+pub type uintmax_t = u64;
+ 
+pub type size_t = usize;
+ 
+pub type ptrdiff_t = isize;
+ 
+pub type intptr_t = isize;
+ 
+pub type uintptr_t = usize;
+ 
+pub type ssize_t = isize;
+ 
+pub type pid_t = c_int;
+ 
+// aarch64 specifc
+pub type c_char = u8;
+ 
+pub type wchar_t = u32;
+ 
+pub type c_long = i64;
+ 
+pub type c_ulong = u64;
+ 
+#[repr(align(16))]
+pub struct _CLongDouble(pub u128);
+ 
+// long double in C means A float point value, which has 128bit length.
+// but some bit maybe not used, so the really length of long double could be 80(x86) or 128(power pc/IEEE)
+// this is different from f128(not stable and not inculded default) in Rust, so we use u128 for FFI(Rust to C).
+// this is unstable and will couse to memfault/data abort.
+pub type c_longdouble = _CLongDouble;
+ 
+pub type pthread_t = c_ulong;
+ 
+pub type pthread_key_t = c_uint;
+ 
+pub type pthread_spinlock_t = c_int;
+ 
+pub type off_t = i64;
+ 
+pub type time_t = c_long;
+ 
+pub type clock_t = c_long;
+ 
+pub type clockid_t = c_int;
+ 
+pub type suseconds_t = c_long;
+ 
+pub type once_fn = extern "C" fn() -> c_void;
+ 
+pub type pthread_once_t = c_int;
+ 
+pub type va_list = *mut c_char;
+ 
+pub type wint_t = c_uint;
+ 
+pub type wctype_t = c_ulong;
+ 
+pub type cmpfunc = extern "C" fn(x: *const c_void, y: *const c_void) -> c_int;
+ 
+#[repr(align(8))]
+#[repr(C)]
+pub struct pthread_cond_t {
+    #[doc(hidden)]
+    size: [u8; __SIZEOF_PTHREAD_COND_T],
+}
+ 
+#[repr(align(8))]
+#[repr(C)]
+pub struct pthread_mutex_t {
+    #[doc(hidden)]
+    size: [u8; __SIZEOF_PTHREAD_MUTEX_T],
+}
+ 
+#[repr(align(4))]
+#[repr(C)]
+pub struct pthread_mutexattr_t {
+    #[doc(hidden)]
+    size: [u8; __SIZEOF_PTHREAD_MUTEXATTR_T],
+}
+ 
+#[repr(align(4))]
+#[repr(C)]
+pub struct pthread_condattr_t {
+    #[doc(hidden)]
+    size: [u8; __SIZEOF_PTHREAD_CONDATTR_T],
+}
+ 
+#[repr(C)]
+pub struct pthread_attr_t {
+    __size: [u64; 7],
+}
+ 
+#[repr(C)]
+pub struct cpu_set_t {
+    bits: [c_ulong; 128 / core::mem::size_of::<c_ulong>()],
+}
+ 
+#[repr(C)]
+pub struct timespec {
+    pub tv_sec: time_t,
+    pub tv_nsec: c_long,
+}
+ 
+#[repr(C)]
+pub struct timeval {
+    pub tv_sec: time_t,
+    pub tv_usec: suseconds_t,
+}
+ 
+#[repr(C)]
+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,
+}
+ 
+#[repr(C)]
+pub struct mbstate_t {
+    pub __opaque1: c_uint,
+    pub __opaque2: c_uint,
+}
+ 
+#[repr(C)]
+pub struct sem_t {
+    pub __val: [c_int; 4 * core::mem::size_of::<c_long>() / core::mem::size_of::<c_int>()],
+}
+ 
+#[repr(C)]
+pub struct div_t {
+    pub quot: c_int,
+    pub rem: c_int,
+}
+ 
+// fcntl
+pub const O_CREAT: u32 = 0100;
+ 
+pub const O_EXCL: u32 = 0200;
+ 
+pub const O_NOCTTY: u32 = 0400;
+ 
+pub const O_TRUNC: u32 = 01000;
+ 
+pub const O_APPEND: u32 = 02000;
+ 
+pub const O_NONBLOCK: u32 = 04000;
+ 
+pub const O_DSYNC: u32 = 010000;
+ 
+pub const O_SYNC: u32 = 04010000;
+ 
+pub const O_RSYNC: u32 = 04010000;
+ 
+pub const O_DIRECTORY: u32 = 0200000;
+ 
+pub const O_NOFOLLOW: u32 = 0400000;
+ 
+pub const O_CLOEXEC: u32 = 02000000;
+ 
+pub const O_ASYNC: u32 = 020000;
+ 
+pub const O_DIRECT: u32 = 040000;
+ 
+pub const O_LARGEFILE: u32 = 0100000;
+ 
+pub const O_NOATIME: u32 = 01000000;
+ 
+pub const O_PATH: u32 = 010000000;
+ 
+pub const O_TMPFILE: u32 = 020200000;
+ 
+pub const O_NDELAY: u32 = O_NONBLOCK;
+ 
+pub const F_DUPFD: u32 = 0;
+ 
+pub const F_GETFD: u32 = 1;
+ 
+pub const F_SETFD: u32 = 2;
+ 
+pub const F_GETFL: u32 = 3;
+ 
+pub const F_SETFL: u32 = 4;
+ 
+pub const F_SETOWN: u32 = 8;
+ 
+pub const F_GETOWN: u32 = 9;
+ 
+pub const F_SETSIG: u32 = 10;
+ 
+pub const F_GETSIG: u32 = 11;
+ 
+pub const F_GETLK: u32 = 12;
+ 
+pub const F_SETLK: u32 = 13;
+ 
+pub const F_SETLKW: u32 = 14;
+ 
+pub const F_SETOWN_EX: u32 = 15;
+ 
+pub const F_GETOWN_EX: u32 = 16;
+ 
+pub const F_GETOWNER_UIDS: u32 = 17;
+ 
+// mman
+pub const MAP_FAILED: u64 = 0xffffffffffffffff;
+ 
+pub const MAP_FIXED_NOREPLACE: u32 = 0x100000;
+ 
+pub const MAP_SHARED_VALIDATE: u32 = 0x03;
+ 
+pub const MAP_SHARED: u32 = 0x01;
+ 
+pub const MAP_PRIVATE: u32 = 0x02;
+ 
+pub const MAP_TYPE: u32 = 0x0f;
+ 
+pub const MAP_FIXED: u32 = 0x10;
+ 
+pub const MAP_ANON: u32 = 0x20;
+ 
+pub const MAP_ANONYMOUS: u32 = MAP_ANON;
+ 
+pub const MAP_NORESERVE: u32 = 0x4000;
+ 
+pub const MAP_GROWSDOWN: u32 = 0x0100;
+ 
+pub const MAP_DENYWRITE: u32 = 0x0800;
+ 
+pub const MAP_EXECUTABLE: u32 = 0x1000;
+ 
+pub const MAP_LOCKED: u32 = 0x2000;
+ 
+pub const MAP_POPULATE: u32 = 0x8000;
+ 
+pub const MAP_NONBLOCK: u32 = 0x10000;
+ 
+pub const MAP_STACK: u32 = 0x20000;
+ 
+pub const MAP_HUGETLB: u32 = 0x40000;
+ 
+pub const MAP_SYNC: u32 = 0x80000;
+ 
+pub const MAP_FILE: u32 = 0;
+ 
+pub const MAP_HUGE_SHIFT: u32 = 26;
+ 
+pub const MAP_HUGE_MASK: u32 = 0x3f;
+ 
+pub const MAP_HUGE_16KB: u32 = 14 << 26;
+ 
+pub const MAP_HUGE_64KB: u32 = 16 << 26;
+ 
+pub const MAP_HUGE_512KB: u32 = 19 << 26;
+ 
+pub const MAP_HUGE_1MB: u32 = 20 << 26;
+ 
+pub const MAP_HUGE_2MB: u32 = 21 << 26;
+ 
+pub const MAP_HUGE_8MB: u32 = 23 << 26;
+ 
+pub const MAP_HUGE_16MB: u32 = 24 << 26;
+ 
+pub const MAP_HUGE_32MB: u32 = 25 << 26;
+ 
+pub const MAP_HUGE_256MB: u32 = 28 << 26;
+ 
+pub const MAP_HUGE_512MB: u32 = 29 << 26;
+ 
+pub const MAP_HUGE_1GB: u32 = 30 << 26;
+ 
+pub const MAP_HUGE_2GB: u32 = 31 << 26;
+ 
+pub const MAP_HUGE_16GB: u32 = 34u32 << 26;
+ 
+pub const PROT_NONE: u32 = 0;
+ 
+pub const PROT_READ: u32 = 1;
+ 
+pub const PROT_WRITE: u32 = 2;
+ 
+pub const PROT_EXEC: u32 = 4;
+ 
+pub const PROT_GROWSDOWN: u32 = 0x01000000;
+ 
+pub const PROT_GROWSUP: u32 = 0x02000000;
+ 
+pub const MS_ASYNC: u32 = 1;
+ 
+pub const MS_INVALIDATE: u32 = 2;
+ 
+pub const MS_SYNC: u32 = 4;
+ 
+pub const MCL_CURRENT: u32 = 1;
+ 
+pub const MCL_FUTURE: u32 = 2;
+ 
+pub const MCL_ONFAULT: u32 = 4;
+ 
+pub const POSIX_MADV_NORMAL: u32 = 0;
+ 
+pub const POSIX_MADV_RANDOM: u32 = 1;
+ 
+pub const POSIX_MADV_SEQUENTIAL: u32 = 2;
+ 
+pub const POSIX_MADV_WILLNEED: u32 = 3;
+ 
+pub const POSIX_MADV_DONTNEED: u32 = 4;
+ 
+// wctype
+pub const WCTYPE_ALNUM: u64 = 1;
+ 
+pub const WCTYPE_ALPHA: u64 = 2;
+ 
+pub const WCTYPE_BLANK: u64 = 3;
+ 
+pub const WCTYPE_CNTRL: u64 = 4;
+ 
+pub const WCTYPE_DIGIT: u64 = 5;
+ 
+pub const WCTYPE_GRAPH: u64 = 6;
+ 
+pub const WCTYPE_LOWER: u64 = 7;
+ 
+pub const WCTYPE_PRINT: u64 = 8;
+ 
+pub const WCTYPE_PUNCT: u64 = 9;
+ 
+pub const WCTYPE_SPACE: u64 = 10;
+ 
+pub const WCTYPE_UPPER: u64 = 11;
+ 
+pub const WCTYPE_XDIGIT: u64 = 12;
+ 
+// locale
+pub const LC_CTYPE: i32 = 0;
+ 
+pub const LC_NUMERIC: i32 = 1;
+ 
+pub const LC_TIME: i32 = 2;
+ 
+pub const LC_COLLATE: i32 = 3;
+ 
+pub const LC_MONETARY: i32 = 4;
+ 
+pub const LC_MESSAGES: i32 = 5;
+ 
+pub const LC_ALL: i32 = 6;
+ 
+// pthread
+pub const __SIZEOF_PTHREAD_COND_T: usize = 48;
+ 
+pub const __SIZEOF_PTHREAD_MUTEX_T: usize = 40;
+ 
+pub const __SIZEOF_PTHREAD_MUTEXATTR_T: usize = 4;
+ 
+pub const __SIZEOF_PTHREAD_CONDATTR_T: usize = 4;
+ 
+// errno.h
+pub const EPERM: c_int = 1;
+ 
+pub const ENOENT: c_int = 2;
+ 
+pub const ESRCH: c_int = 3;
+ 
+pub const EINTR: c_int = 4;
+ 
+pub const EIO: c_int = 5;
+ 
+pub const ENXIO: c_int = 6;
+ 
+pub const E2BIG: c_int = 7;
+ 
+pub const ENOEXEC: c_int = 8;
+ 
+pub const EBADF: c_int = 9;
+ 
+pub const ECHILD: c_int = 10;
+ 
+pub const EAGAIN: c_int = 11;
+ 
+pub const ENOMEM: c_int = 12;
+ 
+pub const EACCES: c_int = 13;
+ 
+pub const EFAULT: c_int = 14;
+ 
+pub const ENOTBLK: c_int = 15;
+ 
+pub const EBUSY: c_int = 16;
+ 
+pub const EEXIST: c_int = 17;
+ 
+pub const EXDEV: c_int = 18;
+ 
+pub const ENODEV: c_int = 19;
+ 
+pub const ENOTDIR: c_int = 20;
+ 
+pub const EISDIR: c_int = 21;
+ 
+pub const EINVAL: c_int = 22;
+ 
+pub const ENFILE: c_int = 23;
+ 
+pub const EMFILE: c_int = 24;
+ 
+pub const ENOTTY: c_int = 25;
+ 
+pub const ETXTBSY: c_int = 26;
+ 
+pub const EFBIG: c_int = 27;
+ 
+pub const ENOSPC: c_int = 28;
+ 
+pub const ESPIPE: c_int = 29;
+ 
+pub const EROFS: c_int = 30;
+ 
+pub const EMLINK: c_int = 31;
+ 
+pub const EPIPE: c_int = 32;
+ 
+pub const EDOM: c_int = 33;
+ 
+pub const ERANGE: c_int = 34;
+ 
+pub const EDEADLK: c_int = 35;
+ 
+pub const ENAMETOOLONG: c_int = 36;
+ 
+pub const ENOLCK: c_int = 37;
+ 
+pub const ENOSYS: c_int = 38;
+ 
+pub const ENOTEMPTY: c_int = 39;
+ 
+pub const ELOOP: c_int = 40;
+ 
+pub const EWOULDBLOCK: c_int = EAGAIN;
+ 
+pub const ENOMSG: c_int = 42;
+ 
+pub const EIDRM: c_int = 43;
+ 
+pub const ECHRNG: c_int = 44;
+ 
+pub const EL2NSYNC: c_int = 45;
+ 
+pub const EL3HLT: c_int = 46;
+ 
+pub const EL3RST: c_int = 47;
+ 
+pub const ELNRNG: c_int = 48;
+ 
+pub const EUNATCH: c_int = 49;
+ 
+pub const ENOCSI: c_int = 50;
+ 
+pub const EL2HLT: c_int = 51;
+ 
+pub const EBADE: c_int = 52;
+ 
+pub const EBADR: c_int = 53;
+ 
+pub const EXFULL: c_int = 54;
+ 
+pub const ENOANO: c_int = 55;
+ 
+pub const EBADRQC: c_int = 56;
+ 
+pub const EBADSLT: c_int = 57;
+ 
+pub const EDEADLOCK: c_int = EDEADLK;
+ 
+pub const EBFONT: c_int = 59;
+ 
+pub const ENOSTR: c_int = 60;
+ 
+pub const ENODATA: c_int = 61;
+ 
+pub const ETIME: c_int = 62;
+ 
+pub const ENOSR: c_int = 63;
+ 
+pub const ENONET: c_int = 64;
+ 
+pub const ENOPKG: c_int = 65;
+ 
+pub const EREMOTE: c_int = 66;
+ 
+pub const ENOLINK: c_int = 67;
+ 
+pub const EADV: c_int = 68;
+ 
+pub const ESRMNT: c_int = 69;
+ 
+pub const ECOMM: c_int = 70;
+ 
+pub const EPROTO: c_int = 71;
+ 
+pub const EMULTIHOP: c_int = 72;
+ 
+pub const EDOTDOT: c_int = 73;
+ 
+pub const EBADMSG: c_int = 74;
+ 
+pub const EOVERFLOW: c_int = 75;
+ 
+pub const ENOTUNIQ: c_int = 76;
+ 
+pub const EBADFD: c_int = 77;
+ 
+pub const EREMCHG: c_int = 78;
+ 
+pub const ELIBACC: c_int = 79;
+ 
+pub const ELIBBAD: c_int = 80;
+ 
+pub const ELIBSCN: c_int = 81;
+ 
+pub const ELIBMAX: c_int = 82;
+ 
+pub const ELIBEXEC: c_int = 83;
+ 
+pub const EILSEQ: c_int = 84;
+ 
+pub const ERESTART: c_int = 85;
+ 
+pub const ESTRPIPE: c_int = 86;
+ 
+pub const EUSERS: c_int = 87;
+ 
+pub const ENOTSOCK: c_int = 88;
+ 
+pub const EDESTADDRREQ: c_int = 89;
+ 
+pub const EMSGSIZE: c_int = 90;
+ 
+pub const EPROTOTYPE: c_int = 91;
+ 
+pub const ENOPROTOOPT: c_int = 92;
+ 
+pub const EPROTONOSUPPOR: c_int = 93;
+ 
+pub const ESOCKTNOSUPPOR: c_int = 94;
+ 
+pub const EOPNOTSUPP: c_int = 95;
+ 
+pub const ENOTSUP: c_int = EOPNOTSUPP;
+ 
+pub const EPFNOSUPPORT: c_int = 96;
+ 
+pub const EAFNOSUPPORT: c_int = 97;
+ 
+pub const EADDRINUSE: c_int = 98;
+ 
+pub const EADDRNOTAVAIL: c_int = 99;
+ 
+pub const ENETDOWN: c_int = 100;
+ 
+pub const ENETUNREACH: c_int = 101;
+ 
+pub const ENETRESET: c_int = 102;
+ 
+pub const ECONNABORTED: c_int = 103;
+ 
+pub const ECONNRESET: c_int = 104;
+ 
+pub const ENOBUFS: c_int = 105;
+ 
+pub const EISCONN: c_int = 106;
+ 
+pub const ENOTCONN: c_int = 107;
+ 
+pub const ESHUTDOWN: c_int = 108;
+ 
+pub const ETOOMANYREFS: c_int = 109;
+ 
+pub const ETIMEDOUT: c_int = 110;
+ 
+pub const ECONNREFUSED: c_int = 111;
+ 
+pub const EHOSTDOWN: c_int = 112;
+ 
+pub const EHOSTUNREACH: c_int = 113;
+ 
+pub const EALREADY: c_int = 114;
+ 
+pub const EINPROGRESS: c_int = 115;
+ 
+pub const ESTALE: c_int = 116;
+ 
+pub const EUCLEAN: c_int = 117;
+ 
+pub const ENOTNAM: c_int = 118;
+ 
+pub const ENAVAIL: c_int = 119;
+ 
+pub const EISNAM: c_int = 120;
+ 
+pub const EREMOTEIO: c_int = 121;
+ 
+pub const EDQUOT: c_int = 122;
+ 
+pub const ENOMEDIUM: c_int = 123;
+ 
+pub const EMEDIUMTYPE: c_int = 124;
+ 
+pub const ECANCELED: c_int = 125;
+ 
+pub const ENOKEY: c_int = 126;
+ 
+pub const EKEYEXPIRED: c_int = 127;
+ 
+pub const EKEYREVOKED: c_int = 128;
+ 
+pub const EKEYREJECTED: c_int = 129;
+ 
+pub const EOWNERDEAD: c_int = 130;
+ 
+pub const ENOTRECOVERABLE: c_int = 131;
+ 
+pub const ERFKILL: c_int = 132;
+ 
+pub const EHWPOISON: c_int = 133;
+ 
+// pthread_attr.h
+pub const TEESMP_THREAD_ATTR_CA_WILDCARD: c_int = 0;
+ 
+pub const TEESMP_THREAD_ATTR_CA_INHERIT: c_int = -1;
+ 
+pub const TEESMP_THREAD_ATTR_TASK_ID_INHERIT: c_int = -1;
+ 
+pub const TEESMP_THREAD_ATTR_HAS_SHADOW: c_int = 0x1;
+ 
+pub const TEESMP_THREAD_ATTR_NO_SHADOW: c_int = 0x0;
+ 
+// unistd.h
+pub const _SC_ARG_MAX: c_int = 0;
+ 
+pub const _SC_CHILD_MAX: c_int = 1;
+ 
+pub const _SC_CLK_TCK: c_int = 2;
+ 
+pub const _SC_NGROUPS_MAX: c_int = 3;
+ 
+pub const _SC_OPEN_MAX: c_int = 4;
+ 
+pub const _SC_STREAM_MAX: c_int = 5;
+ 
+pub const _SC_TZNAME_MAX: c_int = 6;
+ 
+pub const _SC_JOB_CONTROL: c_int = 7;
+ 
+pub const _SC_SAVED_IDS: c_int = 8;
+ 
+pub const _SC_REALTIME_SIGNALS: c_int = 9;
+ 
+pub const _SC_PRIORITY_SCHEDULING: c_int = 10;
+ 
+pub const _SC_TIMERS: c_int = 11;
+ 
+pub const _SC_ASYNCHRONOUS_IO: c_int = 12;
+ 
+pub const _SC_PRIORITIZED_IO: c_int = 13;
+ 
+pub const _SC_SYNCHRONIZED_IO: c_int = 14;
+ 
+pub const _SC_FSYNC: c_int = 15;
+ 
+pub const _SC_MAPPED_FILES: c_int = 16;
+ 
+pub const _SC_MEMLOCK: c_int = 17;
+ 
+pub const _SC_MEMLOCK_RANGE: c_int = 18;
+ 
+pub const _SC_MEMORY_PROTECTION: c_int = 19;
+ 
+pub const _SC_MESSAGE_PASSING: c_int = 20;
+ 
+pub const _SC_SEMAPHORES: c_int = 21;
+ 
+pub const _SC_SHARED_MEMORY_OBJECTS: c_int = 22;
+ 
+pub const _SC_AIO_LISTIO_MAX: c_int = 23;
+ 
+pub const _SC_AIO_MAX: c_int = 24;
+ 
+pub const _SC_AIO_PRIO_DELTA_MAX: c_int = 25;
+ 
+pub const _SC_DELAYTIMER_MAX: c_int = 26;
+ 
+pub const _SC_MQ_OPEN_MAX: c_int = 27;
+ 
+pub const _SC_MQ_PRIO_MAX: c_int = 28;
+ 
+pub const _SC_VERSION: c_int = 29;
+ 
+pub const _SC_PAGE_SIZE: c_int = 30;
+ 
+pub const _SC_PAGESIZE: c_int = 30; /* !! */
+ 
+pub const _SC_RTSIG_MAX: c_int = 31;
+ 
+pub const _SC_SEM_NSEMS_MAX: c_int = 32;
+ 
+pub const _SC_SEM_VALUE_MAX: c_int = 33;
+ 
+pub const _SC_SIGQUEUE_MAX: c_int = 34;
+ 
+pub const _SC_TIMER_MAX: c_int = 35;
+ 
+pub const _SC_BC_BASE_MAX: c_int = 36;
+ 
+pub const _SC_BC_DIM_MAX: c_int = 37;
+ 
+pub const _SC_BC_SCALE_MAX: c_int = 38;
+ 
+pub const _SC_BC_STRING_MAX: c_int = 39;
+ 
+pub const _SC_COLL_WEIGHTS_MAX: c_int = 40;
+ 
+pub const _SC_EXPR_NEST_MAX: c_int = 42;
+ 
+pub const _SC_LINE_MAX: c_int = 43;
+ 
+pub const _SC_RE_DUP_MAX: c_int = 44;
+ 
+pub const _SC_2_VERSION: c_int = 46;
+ 
+pub const _SC_2_C_BIND: c_int = 47;
+ 
+pub const _SC_2_C_DEV: c_int = 48;
+ 
+pub const _SC_2_FORT_DEV: c_int = 49;
+ 
+pub const _SC_2_FORT_RUN: c_int = 50;
+ 
+pub const _SC_2_SW_DEV: c_int = 51;
+ 
+pub const _SC_2_LOCALEDEF: c_int = 52;
+ 
+pub const _SC_UIO_MAXIOV: c_int = 60; /* !! */
+ 
+pub const _SC_IOV_MAX: c_int = 60;
+ 
+pub const _SC_THREADS: c_int = 67;
+ 
+pub const _SC_THREAD_SAFE_FUNCTIONS: c_int = 68;
+ 
+pub const _SC_GETGR_R_SIZE_MAX: c_int = 69;
+ 
+pub const _SC_GETPW_R_SIZE_MAX: c_int = 70;
+ 
+pub const _SC_LOGIN_NAME_MAX: c_int = 71;
+ 
+pub const _SC_TTY_NAME_MAX: c_int = 72;
+ 
+pub const _SC_THREAD_DESTRUCTOR_ITERATIONS: c_int = 73;
+ 
+pub const _SC_THREAD_KEYS_MAX: c_int = 74;
+ 
+pub const _SC_THREAD_STACK_MIN: c_int = 75;
+ 
+pub const _SC_THREAD_THREADS_MAX: c_int = 76;
+ 
+pub const _SC_THREAD_ATTR_STACKADDR: c_int = 77;
+ 
+pub const _SC_THREAD_ATTR_STACKSIZE: c_int = 78;
+ 
+pub const _SC_THREAD_PRIORITY_SCHEDULING: c_int = 79;
+ 
+pub const _SC_THREAD_PRIO_INHERIT: c_int = 80;
+ 
+pub const _SC_THREAD_PRIO_PROTECT: c_int = 81;
+ 
+pub const _SC_THREAD_PROCESS_SHARED: c_int = 82;
+ 
+pub const _SC_NPROCESSORS_CONF: c_int = 83;
+ 
+pub const _SC_NPROCESSORS_ONLN: c_int = 84;
+ 
+pub const _SC_PHYS_PAGES: c_int = 85;
+ 
+pub const _SC_AVPHYS_PAGES: c_int = 86;
+ 
+pub const _SC_ATEXIT_MAX: c_int = 87;
+ 
+pub const _SC_PASS_MAX: c_int = 88;
+ 
+pub const _SC_XOPEN_VERSION: c_int = 89;
+ 
+pub const _SC_XOPEN_XCU_VERSION: c_int = 90;
+ 
+pub const _SC_XOPEN_UNIX: c_int = 91;
+ 
+pub const _SC_XOPEN_CRYPT: c_int = 92;
+ 
+pub const _SC_XOPEN_ENH_I18N: c_int = 93;
+ 
+pub const _SC_XOPEN_SHM: c_int = 94;
+ 
+pub const _SC_2_CHAR_TERM: c_int = 95;
+ 
+pub const _SC_2_UPE: c_int = 97;
+ 
+pub const _SC_XOPEN_XPG2: c_int = 98;
+ 
+pub const _SC_XOPEN_XPG3: c_int = 99;
+ 
+pub const _SC_XOPEN_XPG4: c_int = 100;
+ 
+pub const _SC_NZERO: c_int = 109;
+ 
+pub const _SC_XBS5_ILP32_OFF32: c_int = 125;
+ 
+pub const _SC_XBS5_ILP32_OFFBIG: c_int = 126;
+ 
+pub const _SC_XBS5_LP64_OFF64: c_int = 127;
+ 
+pub const _SC_XBS5_LPBIG_OFFBIG: c_int = 128;
+ 
+pub const _SC_XOPEN_LEGACY: c_int = 129;
+ 
+pub const _SC_XOPEN_REALTIME: c_int = 130;
+ 
+pub const _SC_XOPEN_REALTIME_THREADS: c_int = 131;
+ 
+pub const _SC_ADVISORY_INFO: c_int = 132;
+ 
+pub const _SC_BARRIERS: c_int = 133;
+ 
+pub const _SC_CLOCK_SELECTION: c_int = 137;
+ 
+pub const _SC_CPUTIME: c_int = 138;
+ 
+pub const _SC_THREAD_CPUTIME: c_int = 139;
+ 
+pub const _SC_MONOTONIC_CLOCK: c_int = 149;
+ 
+pub const _SC_READER_WRITER_LOCKS: c_int = 153;
+ 
+pub const _SC_SPIN_LOCKS: c_int = 154;
+ 
+pub const _SC_REGEXP: c_int = 155;
+ 
+pub const _SC_SHELL: c_int = 157;
+ 
+pub const _SC_SPAWN: c_int = 159;
+ 
+pub const _SC_SPORADIC_SERVER: c_int = 160;
+ 
+pub const _SC_THREAD_SPORADIC_SERVER: c_int = 161;
+ 
+pub const _SC_TIMEOUTS: c_int = 164;
+ 
+pub const _SC_TYPED_MEMORY_OBJECTS: c_int = 165;
+ 
+pub const _SC_2_PBS: c_int = 168;
+ 
+pub const _SC_2_PBS_ACCOUNTING: c_int = 169;
+ 
+pub const _SC_2_PBS_LOCATE: c_int = 170;
+ 
+pub const _SC_2_PBS_MESSAGE: c_int = 171;
+ 
+pub const _SC_2_PBS_TRACK: c_int = 172;
+ 
+pub const _SC_SYMLOOP_MAX: c_int = 173;
+ 
+pub const _SC_STREAMS: c_int = 174;
+ 
+pub const _SC_2_PBS_CHECKPOINT: c_int = 175;
+ 
+pub const _SC_V6_ILP32_OFF32: c_int = 176;
+ 
+pub const _SC_V6_ILP32_OFFBIG: c_int = 177;
+ 
+pub const _SC_V6_LP64_OFF64: c_int = 178;
+ 
+pub const _SC_V6_LPBIG_OFFBIG: c_int = 179;
+ 
+pub const _SC_HOST_NAME_MAX: c_int = 180;
+ 
+pub const _SC_TRACE: c_int = 181;
+ 
+pub const _SC_TRACE_EVENT_FILTER: c_int = 182;
+ 
+pub const _SC_TRACE_INHERIT: c_int = 183;
+ 
+pub const _SC_TRACE_LOG: c_int = 184;
+ 
+pub const _SC_IPV6: c_int = 235;
+ 
+pub const _SC_RAW_SOCKETS: c_int = 236;
+ 
+pub const _SC_V7_ILP32_OFF32: c_int = 237;
+ 
+pub const _SC_V7_ILP32_OFFBIG: c_int = 238;
+ 
+pub const _SC_V7_LP64_OFF64: c_int = 239;
+ 
+pub const _SC_V7_LPBIG_OFFBIG: c_int = 240;
+ 
+pub const _SC_SS_REPL_MAX: c_int = 241;
+ 
+pub const _SC_TRACE_EVENT_NAME_MAX: c_int = 242;
+ 
+pub const _SC_TRACE_NAME_MAX: c_int = 243;
+ 
+pub const _SC_TRACE_SYS_MAX: c_int = 244;
+ 
+pub const _SC_TRACE_USER_EVENT_MAX: c_int = 245;
+ 
+pub const _SC_XOPEN_STREAMS: c_int = 246;
+ 
+pub const _SC_THREAD_ROBUST_PRIO_INHERIT: c_int = 247;
+ 
+pub const _SC_THREAD_ROBUST_PRIO_PROTECT: c_int = 248;
+ 
+// limits.h
+pub const PTHREAD_KEYS_MAX: c_int = 128;
+ 
+pub const PTHREAD_STACK_MIN: c_int = 2048;
+ 
+pub const PTHREAD_DESTRUCTOR_ITERATIONS: c_int = 4;
+ 
+pub const SEM_VALUE_MAX: c_int = 0x7fffffff;
+ 
+pub const SEM_NSEMS_MAX: c_int = 256;
+ 
+pub const DELAYTIMER_MAX: c_int = 0x7fffffff;
+ 
+pub const MQ_PRIO_MAX: c_int = 32768;
+ 
+pub const LOGIN_NAME_MAX: c_int = 256;
+ 
+// time.h
+pub const CLOCK_REALTIME: clockid_t = 0;
+ 
+pub const CLOCK_MONOTONIC: clockid_t = 1;
+ 
+pub const PTHREAD_MUTEX_INITIALIZER: pthread_mutex_t =
+    pthread_mutex_t { size: [0; __SIZEOF_PTHREAD_MUTEX_T] };
+ 
+pub const PTHREAD_COND_INITIALIZER: pthread_cond_t =
+    pthread_cond_t { size: [0; __SIZEOF_PTHREAD_COND_T] };
+ 
+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 PTHREAD_MUTEX_STALLED: c_int = 0;
+ 
+pub const PTHREAD_MUTEX_ROBUST: c_int = 1;
+ 
+extern "C" {
+    // ---- ALLOC -----------------------------------------------------------------------------
+    pub fn calloc(nobj: size_t, size: size_t) -> *mut c_void;
+ 
+    pub fn malloc(size: size_t) -> *mut c_void;
+ 
+    pub fn realloc(p: *mut c_void, size: size_t) -> *mut c_void;
+ 
+    pub fn aligned_alloc(align: size_t, len: size_t) -> *mut c_void;
+ 
+    pub fn free(p: *mut c_void);
+ 
+    pub fn posix_memalign(memptr: *mut *mut c_void, align: size_t, size: size_t) -> c_int;
+ 
+    pub fn memchr(cx: *const c_void, c: c_int, n: size_t) -> *mut c_void;
+ 
+    pub fn wmemchr(cx: *const wchar_t, c: wchar_t, n: size_t) -> *mut wchar_t;
+ 
+    pub fn memcmp(cx: *const c_void, ct: *const c_void, n: size_t) -> c_int;
+ 
+    pub fn memcpy(dest: *mut c_void, src: *const c_void, n: size_t) -> *mut c_void;
+ 
+    pub fn memmove(dest: *mut c_void, src: *const c_void, n: size_t) -> *mut c_void;
+ 
+    pub fn memset(dest: *mut c_void, c: c_int, n: size_t) -> *mut c_void;
+ 
+    // ----- PTHREAD ---------------------------------------------------------------------------
+    pub fn pthread_self() -> pthread_t;
+ 
+    pub fn pthread_join(native: pthread_t, value: *mut *mut c_void) -> c_int;
+ 
+    // detach or pthread_attr_setdetachstate must not be called!
+    //pub fn pthread_detach(thread: pthread_t) -> c_int;
+ 
+    pub fn pthread_exit(value: *mut c_void) -> !;
+ 
+    pub fn pthread_attr_init(attr: *mut pthread_attr_t) -> c_int;
+ 
+    pub fn pthread_attr_destroy(attr: *mut pthread_attr_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 pthread_attr_setstacksize(attr: *mut pthread_attr_t, stack_size: size_t) -> c_int;
+ 
+    pub fn pthread_attr_getstacksize(attr: *const pthread_attr_t, size: *mut size_t) -> c_int;
+ 
+    pub fn pthread_attr_settee(
+        attr: *mut pthread_attr_t,
+        ca: c_int,
+        task_id: c_int,
+        shadow: c_int,
+    ) -> c_int;
+ 
+    // C-TA API do not include this interface, but TA can use.
+    pub fn sched_yield() -> c_int;
+ 
+    pub fn pthread_key_create(
+        key: *mut pthread_key_t,
+        dtor: Option<unsafe extern "C" fn(*mut c_void)>,
+    ) -> c_int;
+ 
+    pub fn pthread_key_delete(key: pthread_key_t) -> c_int;
+ 
+    pub fn pthread_getspecific(key: pthread_key_t) -> *mut c_void;
+ 
+    pub fn pthread_setspecific(key: pthread_key_t, value: *const c_void) -> c_int;
+ 
+    pub fn pthread_mutex_destroy(lock: *mut pthread_mutex_t) -> c_int;
+ 
+    pub fn pthread_mutex_init(
+        lock: *mut pthread_mutex_t,
+        attr: *const pthread_mutexattr_t,
+    ) -> c_int;
+ 
+    pub fn pthread_mutex_lock(lock: *mut pthread_mutex_t) -> c_int;
+ 
+    pub fn pthread_mutex_trylock(lock: *mut pthread_mutex_t) -> c_int;
+ 
+    pub fn pthread_mutex_unlock(lock: *mut pthread_mutex_t) -> c_int;
+ 
+    pub fn pthread_mutexattr_destroy(attr: *mut pthread_mutexattr_t) -> c_int;
+ 
+    pub fn pthread_mutexattr_init(attr: *mut pthread_mutexattr_t) -> c_int;
+ 
+    pub fn pthread_mutexattr_settype(attr: *mut pthread_mutexattr_t, _type: c_int) -> c_int;
+ 
+    pub fn pthread_mutexattr_setpshared(attr: *mut pthread_mutexattr_t, pshared: c_int) -> c_int;
+ 
+    pub fn pthread_cond_broadcast(cond: *mut pthread_cond_t) -> c_int;
+ 
+    pub fn pthread_cond_destroy(cond: *mut pthread_cond_t) -> c_int;
+ 
+    pub fn pthread_cond_init(cond: *mut pthread_cond_t, attr: *const pthread_condattr_t) -> c_int;
+ 
+    pub fn pthread_cond_signal(cond: *mut pthread_cond_t) -> c_int;
+ 
+    pub fn pthread_cond_wait(cond: *mut pthread_cond_t, lock: *mut pthread_mutex_t) -> c_int;
+ 
+    pub fn pthread_mutexattr_setrobust(attr: *mut pthread_mutexattr_t, robustness: c_int) -> c_int;
+ 
+    pub fn pthread_create(
+        native: *mut pthread_t,
+        attr: *const pthread_attr_t,
+        f: extern "C" fn(*mut c_void) -> *mut c_void,
+        value: *mut c_void,
+    ) -> c_int;
+ 
+    pub fn pthread_spin_init(lock: *mut pthread_spinlock_t, pshared: c_int) -> c_int;
+ 
+    pub fn pthread_spin_destroy(lock: *mut pthread_spinlock_t) -> c_int;
+ 
+    pub fn pthread_spin_lock(lock: *mut pthread_spinlock_t) -> c_int;
+ 
+    pub fn pthread_spin_trylock(lock: *mut pthread_spinlock_t) -> c_int;
+ 
+    pub fn pthread_spin_unlock(lock: *mut pthread_spinlock_t) -> c_int;
+ 
+    pub fn pthread_setschedprio(native: pthread_t, priority: c_int) -> c_int;
+ 
+    pub fn pthread_once(pot: *mut pthread_once_t, f: Option<once_fn>) -> c_int;
+ 
+    pub fn pthread_equal(p1: pthread_t, p2: pthread_t) -> c_int;
+ 
+    pub fn pthread_mutexattr_setprotocol(a: *mut pthread_mutexattr_t, protocol: c_int) -> c_int;
+ 
+    pub fn pthread_attr_setstack(
+        attr: *mut pthread_attr_t,
+        stack: *mut c_void,
+        size: size_t,
+    ) -> c_int;
+ 
+    pub fn pthread_setaffinity_np(td: pthread_t, size: size_t, set: *const cpu_set_t) -> c_int;
+ 
+    pub fn pthread_getaffinity_np(td: pthread_t, size: size_t, set: *mut cpu_set_t) -> c_int;
+ 
+    // stdio.h
+    pub fn printf(fmt: *const c_char, ...) -> c_int;
+ 
+    pub fn scanf(fmt: *const c_char, ...) -> c_int;
+ 
+    pub fn snprintf(s: *mut c_char, n: size_t, fmt: *const c_char, ...) -> c_int;
+ 
+    pub fn sprintf(s: *mut c_char, fmt: *const c_char, ...) -> c_int;
+ 
+    pub fn vsnprintf(s: *mut c_char, n: size_t, fmt: *const c_char, ap: va_list) -> c_int;
+ 
+    pub fn vsprintf(s: *mut c_char, fmt: *const c_char, ap: va_list) -> c_int;
+ 
+    // Not available.
+    //pub fn pthread_setname_np(thread: pthread_t, name: *const c_char) -> c_int;
+ 
+    pub fn abort() -> !;
+ 
+    // Not available.
+    //pub fn prctl(op: c_int, ...) -> c_int;
+ 
+    pub fn sched_getaffinity(pid: pid_t, cpusetsize: size_t, cpuset: *mut cpu_set_t) -> c_int;
+ 
+    pub fn sched_setaffinity(pid: pid_t, cpusetsize: size_t, cpuset: *const cpu_set_t) -> c_int;
+ 
+    // sysconf is currently only implemented as a stub.
+    pub fn sysconf(name: c_int) -> c_long;
+ 
+    // mman.h
+    pub fn mmap(
+        addr: *mut c_void,
+        len: size_t,
+        prot: c_int,
+        flags: c_int,
+        fd: c_int,
+        offset: off_t,
+    ) -> *mut c_void;
+    pub fn munmap(addr: *mut c_void, len: size_t) -> c_int;
+ 
+    // errno.h
+    pub fn __errno_location() -> *mut c_int;
+ 
+    pub fn strerror(e: c_int) -> *mut c_char;
+ 
+    // time.h
+    pub fn clock_gettime(clock_id: clockid_t, tp: *mut timespec) -> c_int;
+ 
+    // unistd
+    pub fn getpid() -> pid_t;
+ 
+    // time
+    pub fn gettimeofday(tv: *mut timeval, tz: *mut c_void) -> c_int;
+ 
+    pub fn strftime(
+        restrict: *mut c_char,
+        sz: size_t,
+        _restrict: *const c_char,
+        __restrict: *const tm,
+    ) -> size_t;
+ 
+    pub fn time(t: *mut time_t) -> time_t;
+ 
+    // sem
+    pub fn sem_close(sem: *mut sem_t) -> c_int;
+ 
+    pub fn sem_destroy(sem: *mut sem_t) -> c_int;
+ 
+    pub fn sem_getvalue(sem: *mut sem_t, valp: *mut c_int) -> c_int;
+ 
+    pub fn sem_init(sem: *mut sem_t, pshared: c_int, value: c_uint) -> c_int;
+ 
+    pub fn sem_open(name: *const c_char, flags: c_int, ...) -> *mut sem_t;
+ 
+    pub fn sem_post(sem: *mut sem_t) -> c_int;
+ 
+    pub fn sem_unlink(name: *const c_char) -> c_int;
+ 
+    pub fn sem_wait(sem: *mut sem_t) -> c_int;
+ 
+    // locale
+    pub fn setlocale(cat: c_int, name: *const c_char) -> *mut c_char;
+ 
+    pub fn strcoll(l: *const c_char, r: *const c_char) -> c_int;
+ 
+    pub fn strxfrm(dest: *mut c_char, src: *const c_char, n: size_t) -> size_t;
+ 
+    pub fn strtod(s: *const c_char, p: *mut *mut c_char) -> c_double;
+ 
+    // multibyte
+    pub fn mbrtowc(wc: *mut wchar_t, src: *const c_char, n: size_t, st: *mut mbstate_t) -> size_t;
+ 
+    pub fn wcrtomb(s: *mut c_char, wc: wchar_t, st: *mut mbstate_t) -> size_t;
+ 
+    pub fn wctob(c: wint_t) -> c_int;
+ 
+    // prng
+    pub fn srandom(seed: c_uint);
+ 
+    pub fn initstate(seed: c_uint, state: *mut c_char, size: size_t) -> *mut c_char;
+ 
+    pub fn setstate(state: *mut c_char) -> *mut c_char;
+ 
+    pub fn random() -> c_long;
+ 
+    // string
+    pub fn strchr(s: *const c_char, c: c_int) -> *mut c_char;
+ 
+    pub fn strlen(cs: *const c_char) -> size_t;
+ 
+    pub fn strcmp(l: *const c_char, r: *const c_char) -> c_int;
+ 
+    pub fn strcpy(dest: *mut c_char, src: *const c_char) -> *mut c_char;
+ 
+    pub fn strncmp(_l: *const c_char, r: *const c_char, n: size_t) -> c_int;
+ 
+    pub fn strncpy(dest: *mut c_char, src: *const c_char, n: size_t) -> *mut c_char;
+ 
+    pub fn strnlen(cs: *const c_char, n: size_t) -> size_t;
+ 
+    pub fn strrchr(s: *const c_char, c: c_int) -> *mut c_char;
+ 
+    pub fn strstr(h: *const c_char, n: *const c_char) -> *mut c_char;
+ 
+    pub fn wcschr(s: *const wchar_t, c: wchar_t) -> *mut wchar_t;
+ 
+    pub fn wcslen(s: *const wchar_t) -> size_t;
+ 
+    // ctype
+    pub fn isalpha(c: c_int) -> c_int;
+ 
+    pub fn isascii(c: c_int) -> c_int;
+ 
+    pub fn isdigit(c: c_int) -> c_int;
+ 
+    pub fn islower(c: c_int) -> c_int;
+ 
+    pub fn isprint(c: c_int) -> c_int;
+ 
+    pub fn isspace(c: c_int) -> c_int;
+ 
+    pub fn iswctype(wc: wint_t, ttype: wctype_t) -> c_int;
+ 
+    pub fn iswdigit(wc: wint_t) -> c_int;
+ 
+    pub fn iswlower(wc: wint_t) -> c_int;
+ 
+    pub fn iswspace(wc: wint_t) -> c_int;
+ 
+    pub fn iswupper(wc: wint_t) -> c_int;
+ 
+    pub fn towupper(wc: wint_t) -> wint_t;
+ 
+    pub fn towlower(wc: wint_t) -> wint_t;
+ 
+    // cmath
+    pub fn atan(x: c_double) -> c_double;
+ 
+    pub fn ceil(x: c_double) -> c_double;
+ 
+    pub fn ceilf(x: c_float) -> c_float;
+ 
+    pub fn exp(x: c_double) -> c_double;
+ 
+    pub fn fabs(x: c_double) -> c_double;
+ 
+    pub fn floor(x: c_double) -> c_double;
+ 
+    pub fn frexp(x: c_double, e: *mut c_int) -> c_double;
+ 
+    pub fn log(x: c_double) -> c_double;
+ 
+    pub fn log2(x: c_double) -> c_double;
+ 
+    pub fn pow(x: c_double, y: c_double) -> c_double;
+ 
+    pub fn roundf(x: c_float) -> c_float;
+ 
+    pub fn scalbn(x: c_double, n: c_int) -> c_double;
+ 
+    pub fn sqrt(x: c_double) -> c_double;
+ 
+    // stdlib
+    pub fn abs(x: c_int) -> c_int;
+ 
+    pub fn atof(s: *const c_char) -> c_double;
+ 
+    pub fn atoi(s: *const c_char) -> c_int;
+ 
+    pub fn atol(s: *const c_char) -> c_long;
+ 
+    pub fn atoll(s: *const c_char) -> c_longlong;
+ 
+    pub fn bsearch(
+        key: *const c_void,
+        base: *const c_void,
+        nel: size_t,
+        width: size_t,
+        cmp: cmpfunc,
+    ) -> *mut c_void;
+ 
+    pub fn div(num: c_int, den: c_int) -> div_t;
+ 
+    pub fn ecvt(x: c_double, n: c_int, dp: *mut c_int, sign: *mut c_int) -> *mut c_char;
+ 
+    pub fn imaxabs(a: intmax_t) -> intmax_t;
+ 
+    pub fn llabs(a: c_longlong) -> c_longlong;
+ 
+    pub fn qsort(base: *mut c_void, nel: size_t, width: size_t, cmp: cmpfunc);
+ 
+    pub fn strtoul(s: *const c_char, p: *mut *mut c_char, base: c_int) -> c_ulong;
+ 
+    pub fn strtol(s: *const c_char, p: *mut *mut c_char, base: c_int) -> c_long;
+ 
+    pub fn wcstod(s: *const wchar_t, p: *mut *mut wchar_t) -> c_double;
+}
+ 
+pub fn errno() -> c_int {
+    unsafe { *__errno_location() }
+}
+ 
+pub fn CPU_COUNT_S(size: usize, cpuset: &cpu_set_t) -> c_int {
+    let mut s: u32 = 0;
+    let size_of_mask = core::mem::size_of_val(&cpuset.bits[0]);
+ 
+    for i in cpuset.bits[..(size / size_of_mask)].iter() {
+        s += i.count_ones();
+    }
+    s as c_int
+}
+ 
+pub fn CPU_COUNT(cpuset: &cpu_set_t) -> c_int {
+    CPU_COUNT_S(core::mem::size_of::<cpu_set_t>(), cpuset)
+}