tree bf25c7003ba841d227aa82a900cb5df944e0694b
parent 341dfcf8d78eaa3a2dc96dea06f0392eb2978364
author Peter Wu <peter@lekensteyn.nl> 1565656713 +0100
committer Daniel Borkmann <daniel@iogearbox.net> 1565706127 +0200

tools: bpftool: add feature check for zlib

bpftool requires libelf, and zlib for decompressing /proc/config.gz.
zlib is a transitive dependency via libelf, and became mandatory since
elfutils 0.165 (Jan 2016). The feature check of libelf is already done
in the elfdep target of tools/lib/bpf/Makefile, pulled in by bpftool via
a dependency on libbpf.a. Add a similar feature check for zlib.

Suggested-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Peter Wu <peter@lekensteyn.nl>
Acked-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>