#define XBT_ATTRIB_UNUSED __attribute__((unused))
#define XBT_ATTRIB_DEPRECATED_v319(msg) __attribute__((deprecated(msg))) /* Will be dropped in v3.19 */
#define XBT_ATTRIB_DEPRECATED_v320(msg) __attribute__((deprecated(msg))) /* Will be dropped in v3.20 */
+#define XBT_ATTRIB_DEPRECATED_v321(msg) __attribute__((deprecated(msg))) /* Will be dropped in v3.21 */
/* Constructor priorities exist since gcc 4.3. Apparently, they are however not
* supported on Macs. */