在android-gcc和ndk r12b上使用C ++ std :: mutex会出现以下错误
/android-ndk-r12b/sources/cxx-stl/gnu-libstdc++/4.9/include/bits/c++14_warning.h:32: error: #error This file requires compiler and library support for the forthcoming ISO C++ 2014 standard. This support is currently experimental, and must be enabled with the -std=c++1y or -std=gnu++1y compiler options.
#error This file requires compiler and library support for the forthcoming \
^
如何解决此错误？ 我在Android设备的Qt应用程序中编写此代码。我可以在我的.pro文件上使用任何标志来解决这个问题吗？