Re: [PATCH bpf-next] selftests/bpf: Use pkg-config to determine ld flags

On 2023/10/16 20:39, Daniel Borkmann wrote:

On 10/15/23 3:39 PM, Akihiko Odaki wrote:

...

When linking statically, libraries may require other dependencies to be included to ld flags. In particular, libelf may require libzstd. Use pkg-config to determine such dependencies.

Is this not covered via -lz or is it that the name differs?

libelf may not only be linked with zlib but also with zstandard.

Anyway, this change breaks selftest build for BPF CI (see below), could this either be made optional or detected differently?

https://github.com/kernel-patches/bpf/actions/runs/6524480596/job/1771617002...

I sent v2 (I forgot to add bpf-next to the subject for this). This version implements a fallback just in the same way done for HOSTPKG_CONFIG.