Thank you all for the help, it worked now. Interestingly, when compiling the libs spider mokey failed.  At least with optimisations.  Second pass without they were built fine. After that I was able to built pyrogenesis with optimizations works fine so far.  

@sarcoma I've already ported to R28 and updated the links in the first message. But if you are using ModernGUI you have this feature already 

Please have a look on @Stan`s precise answer to this question in the thread 0AD on Steam? (last answer 1 hour ago).  

Why not just get rid of the exit option in 1v1 games? Where the only option is "Resign"?

@Vantha has merged above-mentioned pull request with commit c799e4221a. Thank you all for the joint endeavour!