编译 安卓版本lite FOM 预测库报错

[beyonehan]

• Found Paddle host system: ubuntu, version: 20.04.4 -- Found Paddle host system's CPU: 40 cores -- CMAKE_CXX_FLAGS: -flto -- CMAKE_CXX_FLAGS_RELEASE: CMake Error at cmake/os/android.cmake:23 (message): Must set ANDROID_NDK or env NDK_ROOT Call Stack (most recent call first): cmake/os/common.cmake:73 (include) CMakeLists.txt:33 (include)

-- Configuring incomplete, errors occurred!