[dpdk-stable] [PATCH v5] eal: arm: fix out of tree build

[Bruce Richardson]

On Fri, Jun 11, 2021 at 11:54:25AM +0200, David Marchand wrote:
> Hello Bruce,
> 
> On Wed, Jun 9, 2021 at 12:18 PM Michael Pfeiffer
> <michael.pfeiffer at tu-ilmenau.de> wrote:
> >
> > Including various headers may fail for ARM builds with 'Platform must
> > be built with RTE_FORCE_INTRINSICS' if rte_config.h is not included
> > before. Move the error message after the includes to ensure rte_config.h
> > is always included.
> >
> > Fixes: de966ccdcd7f ("eal/arm: add byte order operations for ARM")
> > Fixes: 17d5fa0fa90d ("eal/arm: add atomic operations for ARMv7")
> > Fixes: d708f01b7102 ("eal/arm: add atomic operations for ARMv8")
> > Fixes: 2173f3333b61 ("mcslock: add MCS queued lock implementation")
> > Fixes: 7860c3965483 ("eal/arm: add spinlock operations for ARM")
> > Fixes: ca49b92079df ("ticketlock: enable generic ticketlock on all arch")
> > Cc: stable at dpdk.org
> > Cc: kosar at rehivetech.com
> > Cc: phil.yang at arm.com
> > Cc: joyce.kong at arm.com
> >
> > Signed-off-by: Michael Pfeiffer <michael.pfeiffer at tu-ilmenau.de>
> 
> The header check currently compiles all headers with an implicit
> "-include rte_config.h".
> I suppose this is because it comes from the project level meson configuration.
> 
> Would there be a way to detect the issue fixed by this patch?
> 
I'm not convinced that there is an issue here. For DPDK compiles
rte_config.h must always be included first, which is why it's included in
the cflags reported by pkg-config. If we do want to move away from having
rte_config as an omnipresent first include, we need to update many DPDK
headers to explicitly include it.

/Bruce