cocos2dx-3.13.1编译android报错/Android.mk:gnustl_static: LOCAL_SRC_FILES points to a missing file

如题，cocos2dx3.13.1项目编译android时报错：

Android NDK: WARNING: APP_PLATFORM android-19 is larger than android:minSdkVersion 9 in ./AndroidManifest.xml    

Android NDK: ERROR:/Users/Evan/Documents/android-ndk/sources/cxx-stl/gnu-libstdc++/Android.mk:gnustl_static: LOCAL_SRC_FILES points to a missing file    

Android NDK: Check that /Users/Evan/Documents/android-ndk/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi/libgnustl_static.a exists  or that its path is correct   

make: Entering directory `/Users/Evan/Documents/work-fight/JdysrFight/fightGame/frameworks/runtime-src/proj.android'

/Users/Evan/Documents/android-ndk/build/core/prebuilt-library.mk:45: *** Android NDK: Aborting    .  Stop.

make: Leaving directory `/Users/Evan/Documents/work-fight/JdysrFight/fightGame/frameworks/runtime-src/proj.android'

解决方法：我之前用的ndk版本为r9，换成r10c就好了。

备注：/Users/Evan/Documents/android-ndk/sources/cxx-stl/gnu-libstdc++/4.9/libs/armeabi/libgnustl_static.a exists  or that its path is correct

注意这里有个4.9/,r9d里只有4.6,4.8没有4.9的，所以暂时是换了ndk版本解决的。