LIBPBD_API ssize_t PBD_APICALLTYPE pread(int handle, void *buf, size_t nbytes, off_t offset);
LIBPBD_API ssize_t PBD_APICALLTYPE pwrite(int handle, const void *buf, size_t nbytes, off_t offset);
LIBPBD_API int PBD_APICALLTYPE poll(struct pollfd *fds, nfds_t nfds, int timeout);
+LIBPBD_API float PBD_APICALLTYPE roundf(float x);
LIBPBD_API double PBD_APICALLTYPE round(double x);
LIBPBD_API double PBD_APICALLTYPE trunc(double x);