[PATCH v4 1/2] config: correct cpu instruction set for cross build

[Thomas Monjalon]

> > > > The platform value would be 'native' only when not cross build.
> > > > Move the operation about modifying cpu_instruction_set while platform
> > > > equals 'native' to the not cross build branch.
> > > >
> > > > Fixes: bf66003b51ec ("build: use platform for generic and native
> > > > builds")
> > > > Cc: stable at dpdk.org
> > > >
> > > > Signed-off-by: Joyce Kong <joyce.kong at arm.com>
> > > > Reviewed-by: Ruifeng Wang <ruifeng.wang at arm.com>
> > >
> > > Looks right, what is the impact on existing users doing current cross builds?
> > 
> > The original operation changes cpu_instruction_set to 'native' when both
> > 'platform == native' and 'cpu_instruction_set == auto'.
> > There was no impact on the existing users for current cross build, as the cross
> > files set cpu field to a specific arch, such as 'armv8-a', and this didn't trigger
> > the modification for cpu_instruction_set.
> > However, if we want to use a common arch in cross files like 'auto', the
> > modification operation would override 'native' value to cpu_instruction_set
> > and b7676fcccab4 ("config: verify machine arch flag") would break the build
> > as it tries to test -march=native.
> > 
> > >
> > > Acked-by: Stephen Hemminger <stephen at networkplumber.org>
> 
> Tested-by: Pavan Nikhilesh <pbhagavatula at marvell.com>

Applied without the second patch of the series, thanks.