diff -r 90bd2c331703 -r b6824a53d4b1 qmlfrontend/engine_interface.h
--- a/qmlfrontend/engine_interface.h	Fri Dec 07 13:35:08 2018 +0100
+++ b/qmlfrontend/engine_interface.h	Fri Dec 07 13:56:45 2018 +0100
@@ -36,18 +36,6 @@
 
 typedef bool advance_simulation_t(EngineInstance* engine_state, uint32_t ticks);
 
-extern hedgewars_engine_protocol_version_t* hedgewars_engine_protocol_version;
-extern start_engine_t* start_engine;
-extern generate_preview_t* generate_preview;
-extern cleanup_t* cleanup;
-
-extern send_ipc_t* send_ipc;
-extern read_ipc_t* read_ipc;
-
-extern setup_current_gl_context_t* setup_current_gl_context;
-extern render_frame_t* render_frame;
-extern advance_simulation_t* advance_simulation;
-
 #ifdef __cplusplus
 }
 };