Fix cpp files erroneously added to build when USE_GPU_MOD is OFF.

CMakeLists.txt

@@ -688,16 +688,19 @@ endif()
 #file(GLOB CPP_FILES "${FAUST_ALGORITHM_CONSTRAINT_SRC_DIR}/*.cpp" "${FAUST_ALGORITHM_FACTORIZATION_SRC_DIR}/*.cpp" "${FAUST_LINEAR_OPERATOR_CPU_SRC_DIR}/*.cpp" "${FAUST_UTILS_SRC_DIR}/*.cpp")
 file(GLOB_RECURSE CPP_FILES ${FAUST_SRC_DIR}/*.cpp)
 file(GLOB_RECURSE GPU_CPP_FILES ${FAUST_SRC_LINEAR_OPERATOR_DIR}/GPU/*.cpp)
+file(GLOB_RECURSE GPU_MOD_CPP_FILES ${FAUST_SRC_LINEAR_OPERATOR_DIR}/GPU2/*.cpp)
 if(NOT BUILD_USE_GPU)
 	foreach(GPU_CPP_FILE IN LISTS GPU_CPP_FILES)
 		list(REMOVE_ITEM CPP_FILES ${GPU_CPP_FILE})
 	endforeach()
 endif()
-if(USE_GPU_MOD)
-	list(APPEND CPP_FILES ${FAUST_SRC_LINEAR_OPERATOR_DIR}/GPU2/faust_cuda_device.cpp ${FAUST_SRC_LINEAR_OPERATOR_DIR}/GPU2/faust_gpu_mod_utils.cpp)
+if(NOT USE_GPU_MOD)
+	foreach(GPU_CPP_FILE IN LISTS GPU_MOD_CPP_FILES)
+		list(REMOVE_ITEM CPP_FILES ${GPU_CPP_FILE})
+	endforeach()
 endif()
-message(STATUS "algorithm cpp files ${CPP_FILES}")
-### include directory 
+message(STATUS "FAµST cpp files: ${CPP_FILES}")
+### include directory
 #include_directories(${FAUST_SRC_LINEAR_OPERATOR_DIR} ${FAUST_LINEAR_OPERATOR_CPU_SRC_DIR} ${EIGEN_INC_DIR} ${FAUST_ALGORITHM_FACTORIZATION_SRC_DIR} ${FAUST_UTILS_SRC_DIR})
 if (BUILD_USE_GPU)
 	include_directories(${FAUST_SRC_LINEAR_OPERATOR_GPU_DIR} ${CUDA_INC_DIR} ${CUDA_RUNTIME_API_INC_DIR} ${CUSPARSE_INC_DIR} ${CUBLAS_V2_INC_DIR})