(Optional) Adding a Custom DLL

You might need to add third-party dynamic link libraries (DLLs) in your applications. For example, you can use OpenCV to postprocess the YOLOv3 inference result. In the scenario where the development environment and operating environment are deployed on different machines, if the operating environment can be accessed only through MindStudio, remote execution fails because the required dynamic link library cannot be found. To solve this problem, the custom DLL support has been added to MindStudio application development to improve development efficiency.

To add a custom DLL, perform the following steps:

1. Cross-compile the DLL.

   For details about the cross compilation procedure, see the corresponding document of the DLL in use. Note that the cross compiler must match the OS architecture of the operating environment.

2. Create a directory for storing the DLL and copy or soft link the cross-compiled DLL to the directory. As shown in Figure 1, the lib directory is created to store libcustom.so.
   Figure 1 DLL directory
   

   Configure the DLL directory environment variable when setting the run configurations of the application project (Building and Running an Application Project). Configure environment variable according to the directory of the main executable file (project_name/out/main). As shown in the screenshot, ../mylib indicates the DLL directory, which is under the project directory. Two configuration modes are provided:

   • Enter an environment variable in the Environment Variables text box, as shown in Figure 2.
   Figure 2 Entering an environment variable
   
   • Click . In the dialog box that is displayed, click and add an environment variable.
   Figure 3 Adding a member to the environment variable list