@Raleighguy The concurrency is set automatically, based on the #of CPUs you have and the system you're running on. On a PI3, it's probably 2, since it doesn't have enough memory and CPU anyway to sustain 4 compilation threads.
@BuZz I already own a Rpi3 but as C1 is more powerfull i wanted to give it a try. I Already tried Lakka once but it misses the emulationstation front end and there lot of tool missing compared to RetroPie
I only wished there was an already build image for C1 like the one for RPI but it appears to be in my dreams.
So i'll stop posting here and open a new thread with the proper information.
Thanks for helping me it been beyond my expectation so far :)
There are issues with it still imho - in the GUI, the mouse position is incorrect vs where the pointer is (makes it somewhat tricky to configure). The default opengl mode doesn't seem to work either - at least on grim fandango (software rendering seems ok though).
@BuZz No overclocked, dmesg say "Out of memory: Kill process 27546 (cc1plus) score 413 or sacrifice child". The complete dmesg: http://pastebin.com/jTHKLBQr.
I'm trying with lightdm disabled. Thanks.
Edit: Fail without lightdm, I will try with multiboot.