Function call relations can be used to reveal the dependency relations between functions in software systems. An integrated function call relation makes a good contribution to program verification and deadlock analysis, and improves the completeness of verification and analysis. Existing methods of function call relations based on static analysis do not provide integrated support for function pointers or virtual functions, which lowers the accuracy of analysis result. This paper proposes a static analysis method for function call relations generation based on Control Flow Graph(CFG). This method gains source file information by a GCC plugin, and predicts function analysis paths. Then it uses a simulation algorithm proposed by this paper to analyze the statements of those paths, while the call of function pointers and virtual functions are analyzed accurately. It generates full function call relations based on the analysis result. Experimental results show that this method can support the analysis of function pointers and virtual functions, and improves the accuracy of analysis results.