-extern XBT_PUBLIC int _sg_mc_comms_determinism;
-extern XBT_PUBLIC int _sg_mc_send_determinism;
-extern XBT_PRIVATE int _sg_mc_snapshot_fds;
-extern XBT_PRIVATE int _sg_mc_termination;
-
-XBT_PRIVATE void _mc_cfg_cb_reduce(const char* name);
-XBT_PRIVATE void _mc_cfg_cb_checkpoint(const char* name);
-XBT_PRIVATE void _mc_cfg_cb_sparse_checkpoint(const char* name);
-XBT_PRIVATE void _mc_cfg_cb_ksm(const char* name);
-XBT_PRIVATE void _mc_cfg_cb_property(const char* name);
-XBT_PRIVATE void _mc_cfg_cb_timeout(const char* name);
-XBT_PRIVATE void _mc_cfg_cb_snapshot_fds(const char* name);
-XBT_PRIVATE void _mc_cfg_cb_hash(const char* name);
-XBT_PRIVATE void _mc_cfg_cb_max_depth(const char* name);
-XBT_PRIVATE void _mc_cfg_cb_visited(const char* name);
-XBT_PRIVATE void _mc_cfg_cb_dot_output(const char* name);
-XBT_PRIVATE void _mc_cfg_cb_comms_determinism(const char* name);
-XBT_PRIVATE void _mc_cfg_cb_send_determinism(const char* name);
-XBT_PRIVATE void _mc_cfg_cb_termination(const char* name);
+extern XBT_PRIVATE simgrid::config::Flag<std::string> _sg_mc_dot_output_file;
+extern XBT_PRIVATE simgrid::config::Flag<bool> _sg_mc_termination;