Index: java/test/h5ex_g_iterate
Index: src/H5FDdirect.c
--- src/H5FDdirect.c.orig	2021-07-01 23:26:41.000000000 +0200
+++ src/H5FDdirect.c	2021-07-09 21:32:42.818403000 +0200
@@ -479,7 +479,9 @@
         o_flags |= O_EXCL;
 
     /* Flag for Direct I/O */
+#ifdef O_DIRECT
     o_flags |= O_DIRECT;
+#endif
 
     /* Open the file */
     if ((fd = HDopen(name, o_flags, H5_POSIX_CREATE_MODE_RW)) < 0)