最近在使用NDK编译JNA接口时报错：

|---------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------| | 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 | > Task :app:ndkBuild FAILED D:/MyDevEnv/Android-SDK/ndk/21.4.7075529/build//../build/core/add-application.mk:88: *** Android NDK: Aborting... . Stop. make: Entering directory 'D:/MyWork/jasmine-android/app/src/main' Android NDK: APP_PLATFORM not set. Defaulting to minimum supported version android-16. Android NDK: WARNING: APP_PLATFORM android-16 is higher than android:minSdkVersion 1 in ./AndroidManifest.xml. NDK binaries will *not* be compatible with devices older than android-16. See https://android.googlesource.com/platform/ndk/+/master/docs/user/common_problems.md for more information. Android NDK: Your APP_BUILD_SCRIPT points to an unknown file: ./jni/Android.mk make: Leaving directory 'D:/MyWork/jasmine-android/app/src/main' Execution failed for task ':app:ndkBuild'. > Process 'command 'D:\MyDevEnv\Android-SDK\ndk\21.4.7075529/ndk-build.cmd'' finished with non-zero exit value 2 * Try: > Run with --stacktrace option to get the stack trace. > Run with --info or --debug option to get more log output. > Run with --scan to get full insights. |

分析一下输出结果，除了对未指定编译平台的警告，重要的原因是APP_BUILD_SCRIPT指向了一个未知的Android.mk文件。

首先检查了一下gradle文件，发现原来是配置的问题，从Android.mk迁移至CMakeLists.txt时有一些跟MakeFile有关的配置没有完全删除掉，修改配置后问题得到解决。