Index: kernel/generic/include/lib/memfnc.h
===================================================================
--- kernel/generic/include/lib/memfnc.h	(revision 1295a1da3e76dbd378b542634f4fd849fc544070)
+++ kernel/generic/include/lib/memfnc.h	(revision e25eb9e38e91624f12cac0a597363cba7b7cd718)
@@ -41,4 +41,6 @@
 extern void *memcpy(void *, const void *, size_t);
 
+#define alloca(size) __builtin_alloca((size))
+
 #endif