Define O_DSYNC as O_SYNC if necessary.

O_DSYNC isn't available on OS X.
Signed-off-by: NAnthony Liguori <aliguori@us.ibm.com>



git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5486 c046a42c-6fe2-441c-8c8c-71466251a162

block-raw-posix.c

@@ -73,6 +73,11 @@
 #define DEBUG_BLOCK_PRINT(formatCstr, args...)
 #endif
 
+/* OS X does not have O_DSYNC */
+#ifndef O_DSYNC
+#define O_SYNC
+#endif
+
 /* Approximate O_DIRECT with O_DSYNC if O_DIRECT isn't available */
 #ifndef O_DIRECT
 #define O_DIRECT O_DSYNC