# patch from CVS head to enable compilation with gcc-4.1.x

diff -Naur ginac-1.3.3/ginac/indexed.cpp ginac-1.3.3-new/ginac/indexed.cpp
--- ginac-1.3.3/ginac/indexed.cpp	2005-05-19 09:24:35.000000000 -0500
+++ ginac-1.3.3-new/ginac/indexed.cpp	2006-03-15 08:32:35.000000000 -0600
@@ -704,6 +704,9 @@
 	}
 }
 
+// Forward declaration needed in absence of friend injection, C.f. [namespace.memdef]:
+ex simplify_indexed(const ex & e, exvector & free_indices, exvector & dummy_indices, const scalar_products & sp);
+
 /** Simplify product of indexed expressions (commutative, noncommutative and
  *  simple squares), return list of free indices. */
 ex simplify_indexed_product(const ex & e, exvector & free_indices, exvector & dummy_indices, const scalar_products & sp)