From mboxrd@z Thu Jan  1 00:00:00 1970
From: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
Subject: Re: [PATCH] build: meson set toolchain info during
 config init
Date: Tue, 3 Apr 2018 15:37:56 +0530
Message-ID: <20180403100755.GA8587@ltp-pvn>
References: <20180402182823.30688-1-pbhagavatula@caviumnetworks.com>
 <20180403095508.GA32@bricha3-MOBL.ger.corp.intel.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Cc: dev@dpdk.org
To: Bruce Richardson <bruce.richardson@intel.com>, thomas@monjalon.net,
 jerin.jacob@caviumnetworks.com
Return-path: <dev-bounces@dpdk.org>
Received: from NAM01-SN1-obe.outbound.protection.outlook.com
 (mail-sn1nam01on0065.outbound.protection.outlook.com [104.47.32.65])
 by dpdk.org (Postfix) with ESMTP id 606E51B68B
 for <dev@dpdk.org>; Tue,  3 Apr 2018 12:08:21 +0200 (CEST)
Content-Disposition: inline
In-Reply-To: <20180403095508.GA32@bricha3-MOBL.ger.corp.intel.com>
List-Id: DPDK patches and discussions <dev.dpdk.org>
List-Unsubscribe: <https://dpdk.org/ml/options/dev>,
 <mailto:dev-request@dpdk.org?subject=unsubscribe>
List-Archive: <http://dpdk.org/ml/archives/dev/>
List-Post: <mailto:dev@dpdk.org>
List-Help: <mailto:dev-request@dpdk.org?subject=help>
List-Subscribe: <https://dpdk.org/ml/listinfo/dev>,
 <mailto:dev-request@dpdk.org?subject=subscribe>
Errors-To: dev-bounces@dpdk.org
Sender: "dev" <dev-bounces@dpdk.org>

On Tue, Apr 03, 2018 at 10:55:08AM +0100, Bruce Richardson wrote:
> On Mon, Apr 02, 2018 at 11:58:23PM +0530, Pavan Nikhilesh wrote:
> > Meson set RTE_TOOLCHAIN to clang/gcc and set RTE_TOOLCHAIN_CLANG/GCC to
> > 1 during initilizing dpdk_conf so that it can be used by both x86 and arm.
> >
> > Signed-off-by: Pavan Nikhilesh <pbhagavatula@caviumnetworks.com>
> > ---
> >  config/arm/meson.build | 9 ---------
> >  config/meson.build     | 8 ++++++++
> >  2 files changed, 8 insertions(+), 9 deletions(-)
> >
> > diff --git a/config/arm/meson.build b/config/arm/meson.build
> > index c1ab6ed01..e9c9eb1a5 100644
> > --- a/config/arm/meson.build
> > +++ b/config/arm/meson.build
> > @@ -83,15 +83,6 @@ impl_0x69 = ['Intel', flags_generic, machine_args_generic]
> >  impl_dpaa = ['NXP DPAA', flags_dpaa, machine_args_generic]
> >  impl_dpaa2 = ['NXP DPAA2', flags_dpaa2, machine_args_generic]
> >
> > -
> > -if cc.get_define('__clang__') != ''
> > -	dpdk_conf.set_quoted('RTE_TOOLCHAIN', 'clang')
> > -	dpdk_conf.set('RTE_TOOLCHAIN_CLANG', 1)
> > -else
> > -	dpdk_conf.set_quoted('RTE_TOOLCHAIN', 'gcc')
> > -	dpdk_conf.set('RTE_TOOLCHAIN_GCC', 1)
> > -endif
> > -
> >  dpdk_conf.set('RTE_FORCE_INTRINSICS', 1)
> >
> >  if cc.sizeof('void *') != 8
> > diff --git a/config/meson.build b/config/meson.build
> > index f8c67578d..5994d7b7b 100644
> > --- a/config/meson.build
> > +++ b/config/meson.build
> > @@ -11,6 +11,14 @@ dpdk_conf.set('RTE_MACHINE', machine)
> >  machine_args = []
> >  machine_args += '-march=' + machine
> >
> > +if cc.get_define('__clang__') != ''
> > +	dpdk_conf.set_quoted('RTE_TOOLCHAIN', 'clang')
> > +	dpdk_conf.set('RTE_TOOLCHAIN_CLANG', 1)
> > +else
> > +	dpdk_conf.set_quoted('RTE_TOOLCHAIN', 'gcc')
> > +	dpdk_conf.set('RTE_TOOLCHAIN_GCC', 1)
> > +endif
> > +
>
> Never thought to look this up on the original patchset, but looking at the
> meson docs, the compiler object already had a "get_id" method to identify
> the compiler. We can use it rather than use checking for explicit defines
> ourselves.  Using get_id() also allows us to identify icc and possibly
> visual studio compiler for future windows compilation too.
>
> http://mesonbuild.com/Reference-tables.html#compiler-ids

Good point will send v2 using get_id and multiple checks instead of else
so that we can extend it in future.

>
> Regards,
> /Bruce

Thanks,
Pavan.