37. no member named ‘int64_t’ in the global namespace using::int64_t

when compile android,

7. #include <string>
8. #include <algorithm>
 

compile the lines above,get the error below:

Compile++ arm  : butterbase <= basetemplate.cpp
In file included from jni/../../../../base/basebutter.cpp:7:
D:/android/ndk_r16b/build//../sources/cxx-stl/llvm-libc++/include\cstdint:156:8: error: no member named 'int64_t' in the global namespace
using::int64_t;
  ~~^
In file included from jni/../../../../base/basebutter.cpp:8:
In file included from D:/android/ndk_r16b/build//../sources/cxx-stl/llvm-libc++/include\string:470:
In file included from D:/android/ndk_r16b/build//../sources/cxx-stl/llvm-libc++/include\string_view:169:
In file included from D:/android/ndk_r16b/build//../sources/cxx-stl/llvm-libc++/include\__string:56:
In file included from D:/android/ndk_r16b/build//../sources/cxx-stl/llvm-libc++/include\algorithm:643:
In file included from D:/android/ndk_r16b/build//../sources/cxx-stl/llvm-libc++/include\memory:658:
D:/android/ndk_r16b/build//../sources/cxx-stl/llvm-libc++/include\atomic:1873:17: error: use of undeclared identifier 'int64_t'
typedef atomic< int64_t> atomic_int64_t;

Method:

From

#include <string>
#include <algorithm>

change to

typedef long long                int64_t;
#include <string>
#include <algorithm>