-/* #define pub2priv(r) ((surf_resource_private_t) ((char *)(r) -(sizeof(struct surf_resource_private_part)))) */
-/* #define priv2pub(r) ((void *) ((char *)(r) +(sizeof(struct surf_resource_private_part)))) */
+/* #define pub2priv(r) ((surf_model_private_t) ((char *)(r) -(sizeof(struct surf_model_private_part)))) */
+/* #define priv2pub(r) ((void *) ((char *)(r) +(sizeof(struct surf_model_private_part)))) */
+
+extern int use_sdp_solver;
+extern int use_lagrange_solver;