https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64782
--- Comment #4 from ktkachov at gcc dot gnu.org --- (In reply to James Greenhalgh from comment #3) > Did the Linux kernel format for /proc/cpuinfo settle down enough that we can > sensibly parse it [1]? > > When implementing this support I guess we will want to look at which kernels > are going to be out there in use, and possibly even try to detect the > /proc/cpuinfo format dynamically (Ugh!). Perhaps you just want to mandate a > minimum kernel version, and bail out if you see something older? > > [1]: https://lkml.org/lkml/2014/10/24/391 That's the format in the link that I was thinking of supporting. The format before the one proposed in the link would work as well, but only for detecting the native -march or non-big.LITTLE systems. But since we would want consistent behaviour regardless of kernel version, we should probably mandate a minimum kernel version for this feature.
