## Depency
- libbpf
  - /usr/lib/libbpf.a
  - some head file
- bpf
  - `/usr/bin/bpftool` to generate skeleton and dump btf

## Refer

- https://facebookmicrosites.github.io/bpf/blog/2020/02/19/bpf-portability-and-co-re.html