wow you done an awesome titan work to test all of this !
I submitted a pull request that was accepted so the GAMESHELL flag now uses these options too.
just see it, my compile was from yesterday 
(rpi2 build also adding set(CMAKE_ASM_FLAGS “-marm -mcpu=cortex-a7 -mfpu=neon-vfpv4 -mfloat-abi=hard”) don’t know if it’s change anything or not
Looks like installing also puts a config file somewhere
it must be that file who was made my systemd complain
I’d love to see your updated kernel available and rolled into a future OS release for Gameshell.
it’s already available as an update into my arch linux port, like box86 that i also packaged yesterday,
it must work on clockwork os too, but it need a manual intervention as it’s an arch package and as it directly use zImage, not uImage, can be found here