On 09/30/2015 10:09 PM, Jonathan Glines wrote: > I did this for a short time, but I ran into a problem where my > Sandybridge desktop was compiling AVR instructions that my AMD netbook > did not understand. This was troublesome for the few packages I > compiled all the time (Asterisk, VirtualBox), but I was also worried > that AVR instructions would sneak into other packages, so I stopped > using this.
Uh, I suspect the main Hydra machines don't support AVX, but that's not the point. Such packages should be fixed to create a generic build. (Multimedia stuff often does compile for various instruction sets, but they switch during runtime, so that's still generic.) In quick inspection of virtualbox build log http://hydra.nixos.org/build/26387080/log/raw , I can only see -mtune=generic (fine) and no -march specified, though it's possible the problem is (still) somewhere deeper. Vladimir
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