The new Release 20.03 is out! You can download binaries for Windows and many major Linux distros here .
Yes, but to what extent I'm not sure.
Yes, but to what extent I'm not sure. In fact it has nothing to do with Code::Blocks, but everything to do with the compiler you choose -- the default is GCC/MinGW32. This question would be better asked on the MinGW mailing lists.