ndk编译出现未定义错误

[青莲隐身]

E:/proj.android/jni//CLasses/Depend/Proj.android/../Tools/Source/ApiAndroid.cpp:
25: error: undefined reference to 'ftime'
libs/filesystem/src/path.cpp:921: error: undefined reference to 'std::codecvt<wc
har_t, char, __mbstate_t> const& std::use_facet<std::codecvt<wchar_t, char, __mb
state_t> >(std::locale const&)'
libs/filesystem/src/path.cpp:921: error: undefined reference to 'std::codecvt<wc
har_t, char, __mbstate_t> const& std::use_facet<std::codecvt<wchar_t, char, __mb
state_t> >(std::locale const&)'
libs/regex/build/../src/cpp_regex_traits.cpp:76: error: undefined reference to '
_CurrentRuneLocale'
clang++.exe: error: linker command failed with exit code 1 (use -v to see invoca
tion)
make: *** [E:/proj.android/obj/local/armeabi/libgame.so] Error 1
make: Leaving directory `E:/proj.android/jni'

搞了好久了 不明所以啊 不知道问题出在哪了，求大神指教

[虎子升天]

同样是这个问题，用NDK8就能编过去，用ndk13就不行，显示未实现ftime，然后把NDK8的libc拷到NDK13中就行，这是怎么回事，NDK13中巴ftime这个函数放那个动态库中了！求大神指点