[SGX] Add ignored files to sgx example (#1852)

apps/sgx/README.md

@@ -19,6 +19,21 @@ Check out the `/tvm/install/ubuntu_install_sgx.sh` for the commands to get these
 
 ## Running the example
 
+If using Docker, start by running
+
+```
+git clone https://github.com/dmlc/tvm.git
+docker run --rm -it -v $(pwd)/tvm:/mnt tvmai/ci-cpu /bin/bash
+```
+then, in the container
+```
+cd /mnt
+mkdir build && cd build
+cmake .. -DUSE_LLVM=ON -DUSE_SGX=/opt/sgxsdk -DRUST_SGX_SDK=/opt/rust-sgx-sdk
+make -j4
+cd ../apps/sgx
+```
+
 `bash run_example.sh`
 
 If everything goes well, you should see a lot of build messages and below them

apps/sgx/enclave/build.rs

+use std::env;
+
+fn main() {
+  println!(
+    "cargo:rustc-link-search=native={}",
+    env::var("BUILD_DIR").unwrap()
+  );
+  println!("cargo:rustc-link-lib=static=model");
+}

apps/sgx/enclave/src/build_model.py

+"""Creates a simple TVM modules."""
+
+import argparse
+import os
+from os import path as osp
+
+import nnvm.compiler
+import nnvm.testing
+import tvm
+
+
+def main():
+    parser = argparse.ArgumentParser()
+    parser.add_argument('-o', '--out-dir', default='.')
+    opts = parser.parse_args()
+
+    # from tutorials/nnvm_quick_start.py
+    dshape = (1, 3, 224, 224)
+    net, params = nnvm.testing.resnet.get_workload(
+        layers=18, batch_size=dshape[0], image_shape=dshape[1:])
+
+    with nnvm.compiler.build_config(opt_level=3):
+        graph, lib, params = nnvm.compiler.build(
+            net, 'llvm --system-lib', shape={'data': dshape}, params=params)
+
+    build_dir = osp.abspath(opts.out_dir)
+    if not osp.isdir(build_dir):
+        os.makedirs(build_dir, exist_ok=True)
+
+    lib.save(osp.join(build_dir, 'model.bc'))
+    with open(osp.join(build_dir, 'graph.json'), 'w') as f_graph_json:
+        f_graph_json.write(graph.json())
+        with open(osp.join(build_dir, 'params.bin'), 'wb') as f_params:
+            f_params.write(nnvm.compiler.save_param_dict(params))
+
+
+if __name__ == '__main__':
+    main()