On Tue, 24 Sep 2013, Ralf Baechle wrote: > My reservations may have been about userland reading /proc/cpuinfo and > looking at the CPU type. Some software may know how to handle the > PC/SC variants but not the MC versions. But this seems to be a fairly > weak concern - and I trust you checked gcc's parsing of /proc/cpuinfo. Actually I wasn't actually aware GCC's got /proc/cpuinfo-based native arch support for the MIPS target these days, thanks for the hint. I have now checked the relevant source file and support is pretty weak there, only half a dozen processors are recognised and no R4k model is among them. In any case strstr is used to check for matches there so I'd expect strings like "R4000" or "R4400" without a further suffix to be chosen. Maciej