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From: Phil Blundell <pb@pbcl.net>
To: Martin Jansa <martin.jansa@gmail.com>
Date: Wed, 18 Nov 2015 17:31:29 +0000
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Subject: Re: [PATCHv2 11/16] arch-armv7ve: add tune include for armv7ve and use it from cortexa7 and cortexa15
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On Wed, 2015-11-18 at 18:20 +0100, Martin Jansa wrote:
> So to get rid of -march we'll have to either
> 
> 1) check in arch-armv7a.inc if TUNE_FEATURES also contains some
> TUNE_FEATURE which will append -mcpu
> 2) don't include armv7a TUNE_FEATURE in TUNE_FEATURES_tune
> -cortexa15t,
> but the MACHINEOVERRIDES is still useful in many cases
> 3) use TUNE_CCARGS_remove to remove -march when adding -mcpu
> 4) rework whole tune files even more (probably by introducing another
> variable which will hold just one of -march,-mcpu,-mtune and gets
> appended to TUNE_CCARGS).

Or 5) just overwrite TUNE_CCARGS in tune-cortexa15.inc after including
arch-armv7a.inc, rather than appending to it.  

But personally I would be inclined to do (2) and add the appropriate
MACHINEOVERRIDES (which I think is just "armv7a" in practice) by steam
in tune-cortexa15.inc.

p.