On Fri, 10 Feb 2012 17:29:23 +0530, Arun Raghavan <arun.raghavan at collabora.co.uk> wrote: > The lack of a configuration option is fine. And as I understand it, the > convention in the ARM world is you compile for a given target and run > only on a machine that is a superset of that target. So, unlike with > MMX/SSE, not having a run-time tests is okay. That's not necessarily true. You can check for NEON at run-time in /proc/cpuinfo, and e.g. libvpx does exactly that. A certain ARM-based Linux kernel-based smartphone operating system has the same ABI for both NEON-capable and NEON-lacking chipsets. I guess Ubuntu is trying to do that too. -- R?mi Denis-Courmont http://www.remlab.net/
