Standard library header <cerrno>

#define errno /* see description */
#define E2BIG /* see description */ // freestanding
#define EACCES /* see description */ // freestanding
#define EADDRINUSE /* see description */ // freestanding
#define EADDRNOTAVAIL /* see description */ // freestanding
#define EAFNOSUPPORT /* see description */ // freestanding
#define EAGAIN /* see description */ // freestanding
#define EALREADY /* see description */ // freestanding
#define EBADF /* see description */ // freestanding
#define EBADMSG /* see description */ // freestanding
#define EBUSY /* see description */ // freestanding
#define ECANCELED /* see description */ // freestanding
#define ECHILD /* see description */ // freestanding
#define ECONNABORTED /* see description */ // freestanding
#define ECONNREFUSED /* see description */ // freestanding
#define ECONNRESET /* see description */ // freestanding
#define EDEADLK /* see description */ // freestanding
#define EDESTADDRREQ /* see description */ // freestanding
#define EDOM /* see description */ // freestanding
#define EEXIST /* see description */ // freestanding
#define EFAULT /* see description */ // freestanding
#define EFBIG /* see description */ // freestanding
#define EHOSTUNREACH /* see description */ // freestanding
#define EIDRM /* see description */ // freestanding
#define EILSEQ /* see description */ // freestanding
#define EINPROGRESS /* see description */ // freestanding
#define EINTR /* see description */ // freestanding
#define EINVAL /* see description */ // freestanding
#define EIO /* see description */ // freestanding
#define EISCONN /* see description */ // freestanding
#define EISDIR /* see description */ // freestanding
#define ELOOP /* see description */ // freestanding
#define EMFILE /* see description */ // freestanding
#define EMLINK /* see description */ // freestanding
#define EMSGSIZE /* see description */ // freestanding
#define ENAMETOOLONG /* see description */ // freestanding
#define ENETDOWN /* see description */ // freestanding
#define ENETRESET /* see description */ // freestanding
#define ENETUNREACH /* see description */ // freestanding
#define ENFILE /* see description */ // freestanding
#define ENOBUFS /* see description */ // freestanding
#define ENODEV /* see description */ // freestanding
#define ENOENT /* see description */ // freestanding
#define ENOEXEC /* see description */ // freestanding
#define ENOLCK /* see description */ // freestanding
#define ENOLINK /* see description */ // freestanding
#define ENOMEM /* see description */ // freestanding
#define ENOMSG /* see description */ // freestanding
#define ENOPROTOOPT /* see description */ // freestanding
#define ENOSPC /* see description */ // freestanding
#define ENOSYS /* see description */ // freestanding
#define ENOTCONN /* see description */ // freestanding
#define ENOTDIR /* see description */ // freestanding
#define ENOTEMPTY /* see description */ // freestanding
#define ENOTRECOVERABLE /* see description */ // freestanding
#define ENOTSOCK /* see description */ // freestanding
#define ENOTSUP /* see description */ // freestanding
#define ENOTTY /* see description */ // freestanding
#define ENXIO /* see description */ // freestanding
#define EOPNOTSUPP /* see description */ // freestanding
#define EOVERFLOW /* see description */ // freestanding
#define EOWNERDEAD /* see description */ // freestanding
#define EPERM /* see description */ // freestanding
#define EPIPE /* see description */ // freestanding
#define EPROTO /* see description */ // freestanding
#define EPROTONOSUPPORT /* see description */ // freestanding
#define EPROTOTYPE /* see description */ // freestanding
#define ERANGE /* see description */ // freestanding
#define EROFS /* see description */ // freestanding
#define ESPIPE /* see description */ // freestanding
#define ESRCH /* see description */ // freestanding
#define ETIMEDOUT /* see description */ // freestanding
#define ETXTBSY /* see description */ // freestanding
#define EWOULDBLOCK /* see description */ // freestanding
#define EXDEV /* see description */ // freestanding