Package: mingw64-gcc-c++

"mingw64-gcc-c++" package binaries on CentOS:

/usr/bin/x86_64-w64-mingw32-c++ /usr/bin/x86_64-w64-mingw32-g++ /usr/x86_64-w64-mingw32/sys-root/mingw/bin/libstdc++-6.dll

You may install this package on CentOS with yum install mingw64-gcc-c++