DPDK patches and discussions
 help / color / mirror / Atom feed
From: Sergio Gonzalez Monroy <sergio.gonzalez.monroy@intel.com>
To: Bruce Richardson <bruce.richardson@intel.com>
Cc: dev@dpdk.org
Subject: Re: [dpdk-dev] [PATCH] Pass CC option when building kernel modules
Date: Thu, 9 Oct 2014 11:04:47 +0100
Message-ID: <20141009100447.GD23978@sivswdev02.ir.intel.com> (raw)
In-Reply-To: <20141009081004.GA14308@BRICHA3-MOBL>

On Thu, Oct 09, 2014 at 09:10:04AM +0100, Bruce Richardson wrote:
> 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.
> 

I just did a bit more testing and it seems like it is not necessary to reset
CC, CC set from the command line takes precedence.

I will post a v2 with the fix.

Thanks,
Sergio

> /Bruce
> 
> > Thanks
> > -- 
> > Thomas

  reply	other threads:[~2014-10-09  9:57 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
2014-10-09 10:04     ` Sergio Gonzalez Monroy [this message]
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

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to=20141009100447.GD23978@sivswdev02.ir.intel.com \
    --to=sergio.gonzalez.monroy@intel.com \
    --cc=bruce.richardson@intel.com \
    --cc=dev@dpdk.org \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

DPDK patches and discussions

This inbox may be cloned and mirrored by anyone:

	git clone --mirror https://inbox.dpdk.org/dev/0 dev/git/0.git

	# If you have public-inbox 1.1+ installed, you may
	# initialize and index your mirror using the following commands:
	public-inbox-init -V2 dev dev/ https://inbox.dpdk.org/dev \
		dev@dpdk.org
	public-inbox-index dev

Example config snippet for mirrors.
Newsgroup available over NNTP:
	nntp://inbox.dpdk.org/inbox.dpdk.dev


AGPL code for this site: git clone https://public-inbox.org/public-inbox.git