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From: Bruce Richardson <bruce.richardson@intel.com>
To: Thomas Monjalon <thomas.monjalon@6wind.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] Pass CC option when building kernel modules
Date: Thu, 9 Oct 2014 09:10:04 +0100
Message-ID: <20141009081004.GA14308@BRICHA3-MOBL> (raw)
In-Reply-To: <8311103.0CSzmCek1E@xps13>

On Wed, Oct 08, 2014 at 07:15:04PM +0200, Thomas Monjalon wrote:
> 2014-10-06 16:57, Sergio Gonzalez Monroy:
> > At least on kernels 3.15 or newer, DPDK build is broken for CLANG target.
> > The issue is that the kernel build system sets the flags before including
> > DPDK makefile and therefore assumes the incorrect compiler.
> > 
> > Signed-off-by: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>
> 
> > --- a/mk/rte.module.mk
> > +++ b/mk/rte.module.mk
> > @@ -78,7 +78,7 @@ build: _postbuild
> >  $(MODULE).ko: $(SRCS_LINKS)
> >  	@if [ ! -f $(notdir Makefile) ]; then ln -nfs $(SRCDIR)/Makefile . ; fi
> >  	@$(MAKE) -C $(RTE_KERNELDIR) M=$(CURDIR) O=$(RTE_KERNELDIR) \
> > -		CROSS_COMPILE=$(CROSS)
> > +		CC=$(KERNELCC) CROSS_COMPILE=$(CROSS)
> 
> > --- a/mk/target/generic/rte.vars.mk
> > +++ b/mk/target/generic/rte.vars.mk
> > @@ -149,4 +149,6 @@ endif
> >  export CFLAGS
> >  export LDFLAGS
> >  
> > +else # ! ifeq ($(KERNELRELEASE),)
> > +CC = $(KERNELCC)
> >  endif
> 
> Why is it needed here? Setting CC in rte.module.mk is not sufficient?
> 
Right now, no it's not, and that's what is causing the error. However, we 
maybe can look and see if we moved the definition in rte.module.mk we might 
get the same effect.

/Bruce

> Thanks
> -- 
> Thomas

  reply	other threads:[~2014-10-09  8:02 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-06 15:57 Sergio Gonzalez Monroy
2014-10-06 16:12 ` Bruce Richardson
2014-10-08 17:15 ` Thomas Monjalon
2014-10-09  8:10   ` Bruce Richardson [this message]
2014-10-09 10:04     ` Sergio Gonzalez Monroy
2014-10-09 10:08 ` [dpdk-dev] [PATCH v2] " Sergio Gonzalez Monroy
2014-10-13 16:08   ` De Lara Guarch, Pablo
2014-10-15 14:03     ` Thomas Monjalon

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