--- extern.h ------------------------------------------------------------------

#ifndef __EXTERN_H__
#define __EXTERN_H__

extern const char* RTSC_CLASS_RealtimeStatechart;
extern const char* RTSC_CLASS_RealtimeStartState;
extern const char* RTSC_CLASS_RealtimeStopState;
extern const char* RTSC_CLASS_RealtimeState;
extern const char* RTSC_CLASS_RealtimeTransition;

#endif // __EXTERN_H__

--- extern.c ------------------------------------------------------------------

const char* RTSC_CLASS_RealtimeStatechart = "de.uni_paderborn.fujaba.umlrt.realtimestatechart.UMLRealtimeStatechart";
const char* RTSC_CLASS_RealtimeStartState = "de.uni_paderborn.fujaba.umlrt.realtimestatechart.UMLRealtimeStartState";
const char* RTSC_CLASS_RealtimeStopState  = "de.uni_paderborn.fujaba.umlrt.realtimestatechart.UMLRealtimeStopState";
const char* RTSC_CLASS_RealtimeState      = "de.uni_paderborn.fujaba.umlrt.realtimestatechart.UMLComplexRealtimeState";
const char* RTSC_CLASS_RealtimeTransition = "de.uni_paderborn.fujaba.umlrt.realtimestatechart.UMLRealtimeTransition";

--- main.c --------------------------------------------------------------------

#include <stdio.h>
#include "extern.h"

int main() {
	printf(RTSC_CLASS_RealtimeStartState);
}