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[sr #110360] AC_CANONICAL_HOST sets wrong $host_cpu on Raspberry Pi 3

From: Zack Weinberg
Subject: [sr #110360] AC_CANONICAL_HOST sets wrong $host_cpu on Raspberry Pi 3
Date: Mon, 9 Nov 2020 13:33:59 -0500 (EST)
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Firefox/78.0

Update of sr #110360 (project autoconf):

                  Status:                    None => Not Autoconf           
             Open/Closed:                    Open => Closed                 


Follow-up Comment #11:

Despite the name, $host_cpu has always held a value more like the architecture
rather than the exact CPU.  Anyway, autoconf just passes through what
config.guess prints -- changing "armv7l" to "armcortex-aXX" (for instance)
will need to be taken up with the mailing list config-patches@gnu.org (see
https://savannah.gnu.org/projects/config ).

> what is the recommended way to get a value for -mcpu in the GNU Toolchain?

We don't have a good answer to that question for cross-compilation right now. 
I'd recommend discussing that with the GCC development list (gcc@gcc.gnu.org)
and getting their agreement first, then coming back to Autoconf if any changes
are needed here.

I don't think there's any further action for us to take in Autoconf right now
so I'm going to close this bug report.  


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