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Re: [Xen-devel] [PATCH] arm: fix build with gcc 4.7.x

>>> David Vrabel <david.vrabel@xxxxxxxxxx> 07/03/12 7:09 PM >>>
>On 25/06/12 11:57, Jan Beulich wrote:
>> As was already pointed out months ago (see
>> http://lists.xen.org/archives/html/xen-devel/2012-02/msg00826.html),
>> gcc 4.7.x (imo validly) refuses to take both -mcpu=cortex-a15 and
>> -march=armv7-a due to conflicting feature sets causing amibiguity in
>> instruction selection. Since the former implies the latter, just use
>> the former (and drop the -march=).
>Given that we currently use the v7-A envelope model rather than a
>Cortex-A15 I think -march=armv7-a is the correct option.

Which would mean passing the -mcpu= was wrong from the start.
I'll leave this to the ARM maintainers in any case, the purpose of the
change was merely to get the thing to build again.


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