Get use_csr option from environment in hierarchical2020Hadamard_gpu2.cpp.in.

misc/test/src/C++/hierarchical2020Hadamard_gpu2.cpp.in

@@ -107,6 +107,7 @@ int main(int argc, char* argv[])
     }
     Real<FPP> lambda;
     bool isUpdateWayR2L = true, isFactSideLeft = false, use_csr = true, packing_RL = false;
+    char* str_use_csr = getenv("USE_CSR");
     char* str_norm2_threshold = getenv("NORM2_THRESHOLD");
     char* str_norm2_max_iter = getenv("NORM2_MAX_ITER");
 	char* str_packing_RL = getenv("PACKING_RL");
@@ -118,6 +119,8 @@ int main(int argc, char* argv[])
        norm2_max_iter = std::atoi(str_norm2_max_iter);
 	if(str_packing_RL)
 		packing_RL = std::atoi(str_packing_RL) != 0;
+	if(str_use_csr)
+		use_csr = std::atoi(str_use_csr) != 0;
     cout << "norm2_threshold: "<< norm2_threshold << endl;
     cout << "norm2_max_iter:" << norm2_max_iter << endl;
 	vector<StoppingCriterion<Real<FPP>>> sc = {30,30};