--- primes_factory.h.orig	2010-09-02 08:11:53 +0000
+++ primes_factory.h	2010-09-09 13:41:34 +0000
@@ -29,6 +29,7 @@
 #include <cln/integer.h>
 #include <cln/numtheory.h>
 #include <limits>
+#include "../../config/config.h"
 
 namespace GiNaC {
 
@@ -47,7 +48,7 @@
 	// or even numeric. Eventually this will be fixed).
 	cln::cl_I last;
 	// This ensures coefficients are immediate.
-	static const int immediate_bits = 8*sizeof(void *) - __alignof__(void *);
+	static const int immediate_bits = 8*SIZEOF_VOIDP - ALIGNOF_VOIDP;
 	static const long opt_hint = (1L << (immediate_bits >> 1)) - 1;
 public:
 	primes_factory()