WEAK_NAME(_thread_fd_unlock)(int fd, int lock_type, const char *fname, int lineno)
WEAK_NAME(_thread_fd_unlock_debug)(fd, lock_type, fname, lineno) int	fd; int	lock_type; char	*fname; int	lineno;
WEAK_NAME(_thread_fd_unlock)(int fd, int lock_type, const char *fname,			     int lineno){}