actually use HAVE_FDATASYNC

bin/xbps-create/main.c

@@ -954,7 +954,11 @@ main(int argc, char **argv)
 	 */
 	binpkg = xbps_xasprintf("%s.%s.xbps", pkgver, arch);
 
+#ifdef HAVE_FDATASYNC
 	(void)fdatasync(pkg_fd);
+#else
+	(void)fsync(pkg_fd);
+#endif
 	myumask = umask(0);
 	(void)umask(myumask);
 

bin/xbps-rindex/repoflush.c

@@ -86,7 +86,11 @@ repodata_flush(struct xbps_handle *xhp, const char *repodir,
 
 	/* Write data to tempfile and rename */
 	archive_write_finish(ar);
+#ifdef HAVE_FDATASYNC
 	fdatasync(repofd);
+#else
+	fsync(repofd);
+#endif
 	assert(fchmod(repofd, 0664) != -1);
 	close(repofd);
 	rename(tname, repofile);

lib/package_script.c

@@ -87,7 +87,11 @@ xbps_pkg_exec_buffer(struct xbps_handle *xhp,
 		goto out;
 	}
 	fchmod(fd, 0750);
+#ifdef HAVE_FDATASYNC
 	fdatasync(fd);
+#else
+	fsync(fd);
+#endif
 	close(fd);
 
 	/* exec script */