Unity crash when loading ncnn model compiled with NCNN_OPENMP=ON by DllImport(C++ library) .
The error occurs when calling load_model . load_param is fine.
Once set NCNN_OPENMP as OFF when compiling ncnn, ncnn model including load_model and forword is fine.

As reference, load and run libtorch is ok with same unity-c++dll way. Libtorch Example cod is from https://pytorch.org/cppdocs/installing.html .
By now, have no idea whether libtorch is compiled with openmp or not.

error log | 日志或报错信息 | ログ

Unity Editor.log shows crash error.

context | 编译/运行环境 | バックグラウンド

unity version：2020.3.2f1
ncnn version: e9a61b3
os version: macOS catalina 10.15.7

how to reproduce | 复现步骤 | 再現方法

1. In C++: write and compile c++ code as dll (bundle in my mac pc)
   example.h

extern "C" {
  ncnn::Net * net_point;
  void InitNetwork() {};
}

example.cpp

#include <example.h>
void InitNetwork() {
  net_point = new ncnn::Net;
  ncnn::Net net&  = *net_point;
  net_point->load_param(param_path);
  net->load_model(model_path);
}

1. In unity: load c++ dll in unity c# code and call in Start funtion

[DllImport("torch_unity", CallingConvention = CallingConvention.Cdecl)]
    private static extern void InitNetwork();