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

[Neil Horman <nhorman@tuxdriver.com>]

On Tue, May 16, 2017 at 01:51:52PM +0200, Jan Viktorin wrote:
> On Tue, 16 May 2017 07:44:59 -0400
> Neil Horman <nhorman@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@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
> 
I would think so, yes.
Neil

> > 
> > 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@RehiveTech.com
>    System Architect              Web:    www.RehiveTech.com
>    RehiveTech
>    Brno, Czech Republic
>