Hi Juraj,

Thanks a lot for your kindly help :)

The reason why I failed to build KNI module from DPDK caused by the cross-compiler which Linux kernel used.

After I changed to use generic Linaro cross-compiler, instead of our internal ones, to build Linux kernel, then KNI module can pass build. It seems that our internal cross-compiler adds some compiler options.

Best Regards,
Joakim Zhang

-----Original Message-----
From: Juraj Linkeš <redacted>
Sent: 2021年4月30日 21:54
To: Joakim Zhang <redacted>; users@dpdk.org;
dev@dpdk.org
Subject: RE: Build KNI module failed

Maybe we actually need to step back a bit and talk about versions.

Which DPDK version are you using?
Why are you using the old make build system instead of Meson?

Support for KNI cross-compilation was only added recently to Meson and I don't
know enough about the old Make system to comment on that.

Juraj

quoted

-----Original Message-----
From: Juraj Linkeš
Sent: Friday, April 30, 2021 2:18 PM
To: 'Joakim Zhang' <redacted>; users@dpdk.org;
dev@dpdk.org
Subject: RE: Build KNI module failed

Hi Joakim,

When I cross-compiled KNI I only used gcc that comes with Ubuntu, e.g.:
sudo apt install gcc-aarch64-linux-gnu libc6-dev-arm64-cross
pkg-config- aarch64-linux-gnu

Which Ubuntu version are you using? The Ubuntu18.04 gcc works fine:
aarch64-linux-gnu-gcc -v
gcc version 7.5.0 (Ubuntu/Linaro 7.5.0-3ubuntu1~18.04)

This is a bit strange, since the versions are the same/similar.

I am using this meson invocation:
meson kni-cross-gcc -Denable_kmods=true
-Dkernel_dir=/home/jlinkes/linux -- cross-file
config/arm/arm64_armv8_linux_gcc

/home/jlinkes/linux is where I have my Linux git repo.

Juraj

quoted

-----Original Message-----
From: dev <redacted> On Behalf Of Joakim Zhang
Sent: Tuesday, April 27, 2021 11:43 AM
To: users@dpdk.org; dev@dpdk.org
Subject: [dpdk-dev] Build KNI module failed


Hi guys,

Is there anyone met gcc build error when build KNI module on Ubuntu
to cross build ARM64?
I tried both gcc-linaro-6.5.0-2018.12-x86_64_aarch64-linux-gnu and
gcc-linaro- 7.5.0-2019.12-x86_64_aarch64-linux-gnu.

The error log as below, any comments would be appreciated! Thanks a lot!
== Build kernel/linux/kni
  CC [M]  /home/zqq/dpdk/arm64-dpaa-linuxapp-
gcc/build/kernel/linux/kni/kni_misc.o
aarch64-linux-gnu-gcc: error: unrecognized command line option
'-mstack- protector-guard=sysreg'; did you mean '-fstack-protector-strong'?
aarch64-linux-gnu-gcc: error: unrecognized command line option
'-mstack- protector-guard-reg=sp_el0'; did you mean '-fstack-protector-all'?
aarch64-linux-gnu-gcc: error: unrecognized command line option
'-mstack- protector-guard-offset=1096'; did you mean
'-fstack-protector-

strong'?

quoted

scripts/Makefile.build:279: recipe for target
'/home/zqq/dpdk/arm64-dpaa-
linuxapp-gcc/build/kernel/linux/kni/kni_misc.o' failed

I search the source code, have not found these gcc command line options.

Best Regards,
Joakim Zhang