Use #include "alloca.h"

lib/alloca.h

@@ -0,0 +1,19 @@
+/*
+ *	BIRD Library -- Linked Lists
+ *
+ *	(c) 2004 Martin Mares <mj@ucw.cz>
+ *
+ *	Can be freely distributed and used under the terms of the GNU GPL.
+ */
+
+#ifndef _BIRD_ALLOCA_H_
+#define _BIRD_ALLOCA_H_
+
+#ifdef HAVE_ALLOCA_H
+#include <alloca.h>
+#else
+#include <stdlib.h>
+#endif
+
+
+#endif