Re: Bug in ax_gcc_archflag.m4

[Peter Simons]

Hi Shawn,

> Not sure who should get this, since there's no contact information in
> the file for the current maintainer, so...
>
> This script sets a CPU specific optimization flag for gcc.
>
> I have a Westmere Intel CPU that the script detects as a Sandybridge,
> which will cause a crash when gcc tries to use instructions the latter
> has but the former doesn't.
>
> The cpu id 1 string for the computer in question:
>
> 206d7:2200800:83b82203:789fbff
>
> This matches a case pattern for Sandybridge, but not the Westmere it
> is. I don't know enough about cpuid guts and how they map to the
> different cpu architectures and sub-versions to actually fix it, though.

I've added Steven, the original author of that macro, to Cc. Hopefully
he can advice how to proceed.

Best regards,
Peter