pub type c_char = u8;
pub type c_long = i64;
pub type c_ulong = u64;
pub type wchar_t = u32;
pub type time_t = i64;
pub type suseconds_t = i64;
pub type register_t = i64;
// should be pub(crate), but that requires Rust 1.18.0
cfg_if!
pub const MAP_32BIT: c_int = 0x00080000;
pub const MINSIGSTKSZ: size_t = 4096; // 1024 * 4