RedHat, Steam and Crusaders King 2

I'm playing King Crusaders II on my RedHat desktop for some time. Although Steam officially supports only Ubuntu distribution, the games, particularly the older ones developed for Ubuntu 16.04, work fine also on RedHat/CentOS. Unfortunately, after the latest background update of the King Crusaders, the game stubbornly refused to run. After closer examination, I discovered that probably the updated game was compiled using newer version of GNU GCC compiler and the required level of libstdc++.so.6 library is not available on my platform.
./ck2: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.20' not found (required by ./ck2)
./ck2: /lib64/libstdc++.so.6: version `GLIBCXX_3.4.21' not found (required by ./ck2)
So it was bad news. But there is good news, after the epic battle I straightened it out. It was as simple as installing a newer version of GNU GCC to get more modern libraries.
The solution is described here.