Unable to compile on Ubuntu 20.04LTS

[NAYANSEN90]

During the compilation process the kni kernel module building fails. It seems that the DPDK 19.08 is not supported for Ubuntu 20.04.

Is there any plans to upgrade the DPDK version for the repository?

[mikebromwich]

I'm successfully using nff-go on Ubuntu Server 20.04.2 LTS - with DPDK 19.08 which comes part of the current nff-go version. I've just followed the documented steps (yesterday!) against a clean machine and have done nothing special.

Did you install the kernel headers using sudo apt-get install -y linux-headers-`uname -r`

What errors are you seeing in the compilation?

[NAYANSEN90]

I had problems while building the kernel KNI module.

/home/nayan/nff-go/dpdk/dpdk/build/build/kernel/linux/kni/kni_net.c:737:20: error: initialization of ‘void (*)(struct net_device , unsigned int)’ from incompatible pointer type ‘void ()(struct net_device *)’ [-Werror=incompatible-pointer-types]
737 | .ndo_tx_timeout = kni_net_tx_timeout,
| ^~~~~~~~~~~~~~~~~~
/home/nayan/nff-go/dpdk/dpdk/build/build/kernel/linux/kni/kni_net.c:737:20: note: (near initialization for ‘kni_net_netdev_ops.ndo_tx_timeout’)
cc1: all warnings being treated as errors

Did you get this?

[NAYANSEN90]

Kernel version: 5.8.0-50-generic

[mikebromwich]

No, I didn't get this - or if I did, it didn't stop compilation. Perhaps, by default, warnings are not considered as errors? I literally just installed the prerequisites advised - and then ran 'make -j8'.

[NAYANSEN90]

I was trying to make the application with only make. Now when I try to make with 2 threads "make -j2" , the thread building the kni kernel module still stops, but the other thread keeps on compiling. I think that is what has happened for you as well. It means that the KNI kernel module will not be built and cannot be used. But maybe the rest of library will work fine.

You could try with simply make and see if that is what you see.

[NAYANSEN90]

Nope still did not build properly.

[knowncold]

I had problems while building the kernel KNI module.

/home/nayan/nff-go/dpdk/dpdk/build/build/kernel/linux/kni/kni_net.c:737:20: error: initialization of ‘void (*)(struct net_device , unsigned int)’ from incompatible pointer type ‘void ()(struct net_device *)’ [-Werror=incompatible-pointer-types]
737 | .ndo_tx_timeout = kni_net_tx_timeout,
| ^~~~~~~~~~~~~~~~~~
/home/nayan/nff-go/dpdk/dpdk/build/build/kernel/linux/kni/kni_net.c:737:20: note: (near initialization for ‘kni_net_netdev_ops.ndo_tx_timeout’)
cc1: all warnings being treated as errors

Did you get this?

I got this problem, too. Have you solved it in some way?

[NAYANSEN90]

No havent solved it. Moved to older Ubuntu version only.

[junjiezou1]

i have the problems too!!!!

[JayaLavanya]

Hi Everyone, I am also facing this issue.. May I know if this is solved for anyone ?

[eecheng87]

Just comment that line and disable Werror, the issue can be solved.

[denisio]

Just edit Makefile and add "-Wno-error=incompatible-pointer-types"

[wenkai-Y]

Just edit Makefile and add "-Wno-error=incompatible-pointer-types"

thank you !

[amberlipp]

I also have this problem in OS 5.10.0-136.12.0.86.oe2203sp1.aarch64 !!!! You can try disable config CONFIG_RTE_KNI_KMOD_ETHTOOL=n