Index: uspace/lib/libc/include/atomicdflt.h
===================================================================
--- uspace/lib/libc/include/atomicdflt.h	(revision 82a04c6d4cedfa8e557149797bfda87ae5da22d7)
+++ uspace/lib/libc/include/atomicdflt.h	(revision a47d49fa1ca6309ebdbc66dd206338f3f54e9080)
@@ -56,8 +56,10 @@
 }
 
+#ifndef CAS 
 static inline bool cas(atomic_t *val, long ov, long nv)
 {
 	return __sync_bool_compare_and_swap(&val->count, ov, nv);
 }
+#endif
 
 #endif