Add runnable GPU main-path prototype

AMSS_NCKU_source/bssn_gpu.cu

@@ -18,12 +18,18 @@ using namespace std;
 #include <fstream>
 #endif
 
-void compare_result_gpu(int ftag1,double * datac,int data_num){
-	double * data = (double*)malloc(sizeof(double)*data_num);
-	cudaMemcpy(data, datac, data_num * sizeof(double), cudaMemcpyDeviceToHost);
-	compare_result(ftag1,data,data_num);
-	free(data);
-}
+void compare_result_gpu(int ftag1,double * datac,int data_num){
+#ifdef RESULT_CHECK
+	double * data = (double*)malloc(sizeof(double)*data_num);
+	cudaMemcpy(data, datac, data_num * sizeof(double), cudaMemcpyDeviceToHost);
+	compare_result(ftag1,data,data_num);
+	free(data);
+#else
+	(void)ftag1;
+	(void)datac;
+	(void)data_num;
+#endif
+}
 
 __global__ void test_const_address(double * testd){
 	int _t = blockIdx.x*blockDim.x+threadIdx.x;