The build instructions should tell which compiler you need for building, especially since the chibios ergodox infinity doesn't compile with the same AtmelAVR toolset as the main repository.
I also tried with the GNU Tools ARM embedded 5.2 2015q4 toolset, but that gave an internal compiler error.
Finally I installed the Chibi Studio and used the 4.9 2015q3 toolset, which seems to work fine. However not tested on the real keyboard yet, as I haven't received it yet, but tomorrow I probably will.
The build instructions should tell which compiler you need for building, especially since the chibios ergodox infinity doesn't compile with the same AtmelAVR toolset as the main repository.
I also tried with the GNU Tools ARM embedded 5.2 2015q4 toolset, but that gave an internal compiler error.
Finally I installed the Chibi Studio and used the 4.9 2015q3 toolset, which seems to work fine. However not tested on the real keyboard yet, as I haven't received it yet, but tomorrow I probably will.