Re: building eBPF

[Sowmini Varadhan <sowmini05@gmail.com>]

On (04/25/20 14:56), Jesper Dangaard Brouer wrote:
> 
> The kernel's samples/bpf/ should still builds with LLVM-9 (and lower).
> Follow instructions in the README.rst file[1].
> 
> There are pre-build Debian and Ubuntu packages for LLVM-10 here:
>  https://apt.llvm.org/

thanks that helped me install llvm-10

However, after all my adventures, I  end up with
# ls /usr/bin/llc*
/usr/bin/llc  /usr/bin/llc-10  /usr/bin/llc-5.0  /usr/bin/llc-6.0  /usr/bin/llc-7
and the default points at 6.0 so I had to go and tweak Makefile
to use clang-10 and llc-10

After that, samples builds and runs (thanks for that hint!).
But not selftests.  However, samples is good enough for my experiments,
for now.

> I suggest you start with the XDP-tutorial[2], it (still) works with older
> LLVM versions: [2] https://github.com/xdp-project/xdp-tutorial

will do.  

--Sowmini