src/java.base/unix/classes/sun/nio/fs/UnixConstants.java.template

@@ -25,10 +25,12 @@
  *
  */
 
 @@END_COPYRIGHT@@
 
+#define _GNU_SOURCE
+
 #include <stdio.h>
 #include <errno.h>
 #include <unistd.h>
 #include <fcntl.h>
 #include <sys/stat.h>

@@ -53,10 +55,11 @@
     static final int PREFIX_O_APPEND = O_APPEND;
     static final int PREFIX_O_CREAT = O_CREAT;
     static final int PREFIX_O_EXCL = O_EXCL;
     static final int PREFIX_O_TRUNC = O_TRUNC;
     static final int PREFIX_O_SYNC = O_SYNC;
+    static final int PREFIX_O_DIRECT = O_DIRECT;
 
 #ifndef O_DSYNC
     // At least FreeBSD doesn't define O_DSYNC
     static final int PREFIX_O_DSYNC = O_SYNC;
 #else