Index: gecode/kernel/core.hpp
===================================================================
--- gecode/kernel/core.hpp	(revision 11516)
+++ gecode/kernel/core.hpp	(working copy)
@@ -651,7 +651,7 @@
    * \brief Base-class for both propagators and branchers
    * \ingroup TaskActor
    */
-  class GECODE_VTABLE_EXPORT Actor : private ActorLink {
+  class GECODE_VTABLE_EXPORT Actor : public ActorLink {
     friend class ActorLink;
     friend class Space;
     friend class Propagator;
@@ -745,7 +745,7 @@
     template<class VIC> friend class VarImp;
     friend class Advisor;
     template<class A> friend class Council;
-  private:
+  public:
     union {
       /// A set of modification events (used during propagation)
       ModEventDelta med;
@@ -989,7 +989,7 @@
     friend class ActorLink;
     friend class Space;
     friend class Choice;
-  private:
+  public:
     /// Unique identity
     unsigned int _id;
     /// Static cast for a non-null pointer (to give a hint to optimizer)
Index: gecode/minimodel.hh
===================================================================
--- gecode/minimodel.hh	(revision 11516)
+++ gecode/minimodel.hh	(working copy)
@@ -246,7 +246,7 @@
   /// Linear relations
   class LinRel {
     friend class BoolExpr;
-  private:
+  public:
     /// Linear expression describing the entire relation
     LinExpr e;
     /// Which relation
Index: configure.ac
===================================================================
--- configure.ac	(revision 11516)
+++ configure.ac	(working copy)
@@ -98,7 +98,7 @@
 AC_CXX_COMPILER_VENDOR(ac_gecode_compiler_vendor)
 case $ac_gecode_compiler_vendor in
 gnu)
-  AC_CHECK_GCC_VERSION(4,2)
+  AC_CHECK_GCC_VERSION(4,0)
   ;;
 intel)
   ;;
Index: configure.ac.in
===================================================================
--- configure.ac.in	(revision 11516)
+++ configure.ac.in	(working copy)
@@ -94,7 +94,7 @@
 AC_CXX_COMPILER_VENDOR(ac_gecode_compiler_vendor)
 case $ac_gecode_compiler_vendor in
 gnu)
-  AC_CHECK_GCC_VERSION(4,2)
+  AC_CHECK_GCC_VERSION(4,0)
   ;;
 intel)
   ;;