How to compiled model to system Module? Why g++ is need when runtime?

My compiled model code: target = 'llvm ' target_host = 'llvm' graph, lib, params =, target=target, target_host=target_host, params=params) after build, save graph, lib, params to file, then when run on target device at load model loaded_lib = tvm.module.load(path_lib) cause the error FileNotFoundError: [Errno 2] No such file or directory: 'g++'

I think i should build the model to system module, and i try to use llvm args target = 'llvm ' target_host = 'llvm --system-lib' but it not works. anyone can help me?