ndk-build opencv遇到问题，请指教

ndk-build opencv有问题。请建议ndk-build opencv。请简单介绍一下:环境1 OpenCV-2 . 4 . 9-Android-SDK 2 Android-NDK-R9错误CMD窗口。执行ndk-build命令后，会提示您Opencv background_segm。