Re: [PATCH 2/6] config: add clang support for armv8a linuxapp

["Sekhar, Ashwin" <Ashwin.Sekhar@cavium.com>]

On Thu, 2017-05-11 at 10:54 +0530, Jerin Jacob wrote:
> -----Original Message-----
> > 
> > Date: Wed, 10 May 2017 03:16:39 -0700
> > From: Ashwin Sekhar T K <ashwin.sekhar@caviumnetworks.com>
> > To: thomas@monjalon.net, jerin.jacob@caviumnetworks.com,
> >  maciej.czekaj@caviumnetworks.com, viktorin@rehivetech.com,
> >  jianbo.liu@linaro.org, bruce.richardson@intel.com,
> >  pablo.de.lara.guarch@intel.com, konstantin.ananyev@intel.com
> > Cc: dev@dpdk.org, Ashwin Sekhar T K <ashwin.sekhar@caviumnetworks.c
> > om>
> > Subject: [dpdk-dev] [PATCH 2/6] config: add clang support for
> > armv8a
> >  linuxapp
> > X-Mailer: git-send-email 2.13.0.rc1
> > 
> > Added new config arm64-armv8a-linuxapp-clang
> > 
> > Signed-off-by: Ashwin Sekhar T K <ashwin.sekhar@caviumnetworks.com>
> > ---
> >  config/defconfig_arm64-armv8a-linuxapp-clang | 56
> > ++++++++++++++++++++++++++++
> >  1 file changed, 56 insertions(+)
> >  create mode 100644 config/defconfig_arm64-armv8a-linuxapp-clang
> > 
> > diff --git a/config/defconfig_arm64-armv8a-linuxapp-clang
> > b/config/defconfig_arm64-armv8a-linuxapp-clang
> > +#include "common_linuxapp"
> > +
> > +CONFIG_RTE_MACHINE="armv8a"
> > +
> > +CONFIG_RTE_ARCH="arm64"
> > +CONFIG_RTE_ARCH_ARM64=y
> > +CONFIG_RTE_ARCH_64=y
> > +
> > +CONFIG_RTE_FORCE_INTRINSICS=y
> > +
> > +CONFIG_RTE_TOOLCHAIN="clang"
> > +CONFIG_RTE_TOOLCHAIN_CLANG=y
> > +
> > +# Maximum available cache line size in arm64 implementations.
> > +# Setting to maximum available cache line size in generic config
> > +# to address minimum DMA alignment across all arm64
> > implementations.
> > +CONFIG_RTE_CACHE_LINE_SIZE=128
> > +
> > +CONFIG_RTE_EAL_IGB_UIO=n
> > +
> > +CONFIG_RTE_LIBRTE_FM10K_PMD=n
> > +CONFIG_RTE_LIBRTE_SFC_EFX_PMD=n
> > +CONFIG_RTE_LIBRTE_AVP_PMD=n
> > +
> > +CONFIG_RTE_SCHED_VECTOR=n
> IMO, It is better to create common_armv8 config and let gcc and clang
> use that to avoid duplicating the symbols.
> 
For x86, this is the convention that is followed. There are separate
defconfigs for icc, gcc, clang with symbols duplicated. Do we need to
deviate from this convention for armv8a?
> >