How to export the onnx model from detectron2 and use it in the c++ version of onnxruntime

[Myxrf]

How to export the onnx model from detectron2 and use it in the c++ version of onnxruntime，
The model officially exported by detectron2 seems to be unable to be used on onnxruntime. Is there a way?

[thiagocrepaldi]

I am working on adding support to ONNX export (with and without caffe2) #4120 and #4153 to detectron, so that it can run on ONNX Runtime.

Hopefully it gets accepted soon