编译模式：release
使用 Eclipse 工程：D:\SGame\SGameProject\build\jsb-binary\frameworks\runtime-src\proj.android
未指定 Android 目标平台版本，自动查找一个可用版本…
正在执行：’“F:\game\Android-SDK-Windows\Android-SDK\tools\android” update project -t android-20 -p D:\SGame\SGameProject\build\jsb-binary\frameworks\runtime-src\proj.android’
Updated project.properties
Updated local.properties
Updated file D:\SGame\SGameProject\build\jsb-binary\frameworks\runtime-src\proj.android\proguard-project.txt
正在执行 ndk-build…
NDK 编译模式：release
NDK_TOOLCHAIN_VERSION: 4.8
正在执行：’“F:\android-ndk64-r10b-windows-x86_64\android-ndk-r10b\ndk-build” -C D:\SGame\SGameProject\build\jsb-binary\frameworks\runtime-src\proj.android -j4 NDK_MODULE_PATH=C:/Users/XXX/AppData/Local/CocosCreator/app-1.1.0/resources/cocos2d-x;C:/Users/XXX/AppData/Local/CocosCreator/app-1.1.0/resources/cocos2d-x/cocos;C:/Users/XXX/AppData/Local/CocosCreator/app-1.1.0/resources/cocos2d-x/external;C:/Users/XXX/AppData/Local/CocosCreator/app-1.1.0/resources/cocos2d-x/external/android/include;C:/Users/XXX/AppData/Local/CocosCreator/app-1.1.0/resources/cocos2d-x/external/android/spidermonkey NDK_TOOLCHAIN_VERSION=4.8’
Android NDK: WARNING: Ignoring unknown import directory: C:/Users/XXX/AppData/Local/CocosCreator/app-1.1.0/resources/cocos2d-x/external/android/include
Android NDK: WARNING: Ignoring unknown import directory: C:/Users/XXX/AppData/Local/CocosCreator/app-1.1.0/resources/cocos2d-x/external/android/spidermonkey
Android NDK: ERROR:F:/android-ndk64-r10b-windows-x86_64/android-ndk-r10b/sources/cxx-stl/gnu-libstdc++/Android.mk:gnustl_static: LOCAL_SRC_FILES points to a missing file
Android NDK: Check that F:/android-ndk64-r10b-windows-x86_64/android-ndk-r10b/sources/cxx-stl/gnu-libstdc++/4.8/libs/armeabi/thumb/libgnustl_static.a exists or that its path is correct
make.exe: Entering directory D:/SGame/SGameProject/build/jsb-binary/frameworks/runtime-src/proj.android' make.exe: Leaving directory D:/SGame/SGameProject/build/jsb-binary/frameworks/runtime-src/proj.android’
F:/android-ndk64-r10b-windows-x86_64/android-ndk-r10b/build/core/prebuilt-library.mk:45: *** Android NDK: Aborting . Stop.
执行命令出错，返回值：2。
这个是什么原因呢