SpresenseのArduino Platformで、std::stringクラスを使おうと思い、#include <string>したところコンパイルエラーが発生しました。

C++標準ライブラリですが、利用不可でしょうか？

Code:

#include <string>

void setup() {
  // put your setup code here, to run once:

}

void loop() {
  // put your main code here, to run repeatedly:

}

Error message:

In file included from c:\users\takashi\documents\arduinodata\packages\spresense\tools\gcc-arm-none-eabi\5.4.1\windows\arm-none-eabi\include\c++\5.4.1\bits\stl_algobase.h:61:0,

                 from c:\users\takashi\documents\arduinodata\packages\spresense\tools\gcc-arm-none-eabi\5.4.1\windows\arm-none-eabi\include\c++\5.4.1\bits\char_traits.h:39,

                 from c:\users\takashi\documents\arduinodata\packages\spresense\tools\gcc-arm-none-eabi\5.4.1\windows\arm-none-eabi\include\c++\5.4.1\string:40,

                 from C:\Users\takashi\AppData\Local\Temp\arduino_modified_sketch_278803\sketch_jul17a.ino:1:

c:\users\takashi\documents\arduinodata\packages\spresense\tools\gcc-arm-none-eabi\5.4.1\windows\arm-none-eabi\include\c++\5.4.1\bits\cpp_type_traits.h:168:12: error: redefinition of 'struct std::__is_integer<unsigned char>'

     struct __is_integer<unsigned char>

            ^

c:\users\takashi\documents\arduinodata\packages\spresense\tools\gcc-arm-none-eabi\5.4.1\windows\arm-none-eabi\include\c++\5.4.1\bits\cpp_type_traits.h:147:12: error: previous definition of 'struct std::__is_integer<unsigned char>'

     struct __is_integer<bool>

            ^

（Sony developer forumにもポストしています）