[PATCH v7] usertools: rewrite pmdinfo

[Robin Jarry]

Thomas Monjalon, Oct 12, 2022 at 18:16:
> What about implementing both?
> If ldd is available, use it,
> otherwise use LD_TRACE_LOADED_OBJECTS variable.

This is a bit overkill in my opinion. Also it would make the behaviour
somewhat different whether ldd is available and/or the analyzed binaries
are executable.

I think it is an OK limitation to require that the analyzed ELF files
are executable.

By the way, the following command:

    LD_TRACE_LOADED_OBJECTS=1 build/app/dpdk-test-pmd

Works both on Linux and FreeBSD and produces similar outputs.