return(-1);
}
-#ifdef POSIX_FADVISE
+#ifdef HAVE_POSIX_FADVISE
/* this file is not going to be read again any time
soon, so we drop everything except the header portion from
the buffer cache. for this to work, we have to fdsync the file
a single rrd file is not too large, but I assume this should not be the case
in general. Otherwhise we would have to sync and release while writing all
the unknown data. */
+ fflush(rrd_file);
fdatasync(fileno(rrd_file));
if (0 != posix_fadvise(fileno(rrd_file), rrd_head_size, 0, POSIX_FADV_DONTNEED)) {
rrd_set_error("setting POSIX_FADV_DONTNEED on '%s': %s",file_name, rrd_strerror(errno));