Merge pull request #408 from sandrine-bailleux/sb/cassert

Make CASSERT() macro callable from anywhere

include/lib/cassert.h

@@ -36,7 +36,10 @@
  * an invalid C construct if 'cond' evaluates to false.
  * The following compilation error is triggered if the assertion fails:
  * "error: size of array 'msg' is negative"
+ * The 'unused' attribute ensures that the unused typedef does not emit a
+ * compiler warning.
  ******************************************************************************/
-#define CASSERT(cond, msg)	typedef char msg[(cond) ? 1 : -1]
+#define CASSERT(cond, msg)	\
+	typedef char msg[(cond) ? 1 : -1] __attribute__((unused))
 
 #endif /* __CASSERT_H__ */