On 01/09/11 10:40, Andrew Stubbs wrote:
I'm currently trying to get GCC to auto-detect what CPU to optimize for
by finding out what CPU it's actually running on (the user would only
have to pass -mcpu=native). It does this simply by reading /proc/cpuinfo.
Thanks to everybody who answered my previous questions. I now have
sufficient numbers to be going on with. :)
Next question ... is /proc/cpuinfo really the best way to detect this?
I mean, is auxv a better approach? Or something else? What's the most
efficient, and most stable API to read the CPU architecture, CPU model,
and FPU/NEON availability?
There's some worry among the toolchain team that /proc/cpuinfo is a
somewhat fragile and inefficient way to achieve this goal. Some insight
from the kernel experts would be helpful!
Thanks
Andrew
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