Mysql packaging is maintained on github:

https://github.com/openSUSE/mysql-packaging/

There is makefile so simply running make kills after few hours your machine.

Ssh/terminal connection: sometimes completely dead sometimes terminal still
works 

Serial: didn't work for me but might be pebkac

Kernel: Linux bugaboo 3.17.2-1-desktop #1 SMP PREEMPT Fri Nov 7 15:18:21 UTC
2014 (bf63174) x86_64 x86_64 x86_64 GNU/Linux

Dmesg: nothing interesting just OOM killing process here and there as resources
get sparse.

.oscrc settings:
build-jobs = 200

^^ this is the probable cause, too many threads for GCC. I have this high
settings as I use icecream when possible but in this case it uses just local
build. Still it should not kill the whole machine.