[PATCH] app/testpmd: fix build without drivers

[Thomas Monjalon]

25/02/2022 16:50, Bruce Richardson:
> On Fri, Feb 25, 2022 at 04:26:53PM +0100, Thomas Monjalon wrote:
> > When ixgbe and bnxt are disabled, compilation was failing:
> > 
> > app/test-pmd/cmdline.c:9396:11: error:
> > 	variable 'vf_rxmode' set but not used
> > 
> > Fixes: 4cfe399f6550 ("net/bnxt: support to set VF rxmode")
> > Cc: stable at dpdk.org
> > 
> > Signed-off-by: Thomas Monjalon <thomas at monjalon.net>
> > ---
> >  app/test-pmd/cmdline.c | 1 +
> >  1 file changed, 1 insertion(+)
> > 
> > diff --git a/app/test-pmd/cmdline.c b/app/test-pmd/cmdline.c
> > index b4ba8da2b0..7ab0575e64 100644
> > --- a/app/test-pmd/cmdline.c
> > +++ b/app/test-pmd/cmdline.c
> > @@ -9409,6 +9409,7 @@ cmd_set_vf_rxmode_parsed(void *parsed_result,
> >  	}
> >  
> >  	RTE_SET_USED(is_on);
> > +	RTE_SET_USED(vf_rxmode);
> >  
> Checking the code, I see the issue and the fix looks correct. However,
> doing some basic builds disabling the relevant drivers, and all drivers, in
> fact, I fail to reproduce the actual error message. Does this error only
> occur at lower optimization levels, or only using clang or similar?

I don't remember, probably clang only.