[dpdk-users] [dpdk-dev] Issue->Dpdk for arm cortex-a15 compilation

[Jan Viktorin]

On Tue, 16 May 2017 07:44:59 -0400
Neil Horman <nhorman at tuxdriver.com> wrote:

> On Tue, May 16, 2017 at 12:51:40PM +0200, Jan Viktorin wrote:
> > Hello Jimmy,
> > 
> > On Tue, 16 May 2017 15:38:22 +0530
> > Jimmy Carter <jimmycarter256 at gmail.com> wrote:
> >   
> > > Hi All
> > > 
> > > I am using dpdk16.11.1 and want to use openwrt external toolchain so that I
> > > can cross compile for arm cortex 15
> > > neon.(arm_cortex-a15+neon-vfpv4_gcc-5.4.0_musl_eabi)  
> > 
> > I've never built DPDK with musl-eabi. I don't think that your issue is
> > related but just note that my builds have always been done with gnueabi.
> >   
> > > My target board is Tp link archer C2600.
> > > I am have assigned these env variables but still getting compilation error
> > > 
> > > export
> > > STAGING_DIR=/home/xav-101000739/ovslede/source/staging_dir/toolchain-arm_cortex-a15+neon-vfpv4_gcc-5.4.0_musl_eabi
> > > export
> > > PATH=$PATH:/home/xav-101000739/ovslede/source/staging_dir/toolchain-arm_cortex-a15+neon-vfpv4_gcc-5.4.0_musl_eabi/bin
> > > 
> > > 
> > > export CROSS=arm-openwrt-linux-
> > > export DPDK_TARGET=arm-armv7a-linuxapp-gcc
> > > export DPDK_DIR=$PWD
> > > export DPDK_BUILD=$DPDK_DIR/$DPDK_TARGET
> > > export
> > > CFLAGS+=-I/home/xav-101000739/ovslede/source/staging_dir/toolchain-arm_cortex-a15+neon-vfpv4_gcc-5.4.0_musl_eabi
> > > export RTE_SDK=$PWD
> > > export RTE_TARGET=arm-armv7a-linuxapp-gcc
> > > export DPDK_BUILD_DIR=arm-armv7a-linuxapp-gcc
> > >   
> > 
> > There is a patch to Buildroot that can help you with the setup. See:
> > 
> >  https://patchwork.ozlabs.org/patch/611383/
> >   
> > > 
> > > Error:Attached file  
> > 
> > Your build fails on
> > 
> > eal_memory.c:92:
> > /home/xav-101000739/Downloads/dpdk/dpdk-stable-16.11.1/build/include/rte_lcore.h:56:10: error: unknown type name 'cpu_set_t'
> >   typedef cpu_set_t rte_cpuset_t;
> > 
> > This looks like there is some issue with Linux Kernel headers.
> > 
> > lib/librte_eal/common/include/rte_lcore.h:
> > 
> >  53 #if defined(__linux__)
> >  54         typedef cpu_set_t rte_cpuset_t;
> >  55 #elif defined(__FreeBSD__)
> >  56 #include <pthread_np.h>
> >  57         typedef cpuset_t rte_cpuset_t;
> >  58 #endif
> > 
> > Probably, you should set the RTE_KERNELDIR properly.
> >   
> I don't think so.  cpu_set_t is most recently defined in
> /usr/include/bits/shced.h, which is a glibc header.  What version of glibc are
> you building with?

So, in that case, it can be related to the musl libc (no glibc at all)
as I pointed above...

Jan

> 
> Neil
> 
> > > 
> > > Please advise
> > > Does dpdk have support for openwrt (arm cortex a15)  
> > 
> > DPDK does not support OpenWRT because (as far as I know) nobody from
> > the DPDK community is using it in this way. I build DPDK via Buildroot
> > but this is unsupported by the DPDK upstream.
> > 
> > I could build DPDK for Cortex-A7, Cortex-A9 and Cortex-A15 in the past.
> > 
> > I run regular builds of the master branch and I can see no breakage
> > for the arm-armv7a-linuxapp-gcc configuration.
> > 
> > Regards
> > Jan
> >   
> > > 
> > > Thanks
> > > Akshay  
> >   



-- 
   Jan Viktorin                  E-mail: Viktorin at RehiveTech.com
   System Architect              Web:    www.RehiveTech.com
   RehiveTech
   Brno, Czech Republic