Re: [PATCH v3 bpf-next 5/7] libbpf: move bpf_{helpers,endian,tracing}.h into libbpf
From: Andrii Nakryiko <hidden>
Date: 2019-10-08 18:02:31
Also in:
bpf
On Tue, Oct 8, 2019 at 8:37 AM Jiri Benc [off-list ref] wrote:
On Fri, 4 Oct 2019 18:37:44 +0000, Yonghong Song wrote:quoted
distro can package bpf/btf uapi headers into libbpf package. Users linking with libbpf.a/libbpf.so can use bpf/btf.h with include path pointing to libbpf dev package include directory. Could this work?I don't think it would. Distros have often a policy against bundling files that are available from one package (in this case, kernel-headers or similar) in a different package (libbpf). The correct way is making the libbpf package depend on a particular version of kernel-headers (or newer). As I said, I don't see a problem here. It's not a special situation, it's just usual dependencies.
We ended up switching to auto-generating BPF helpers from UAPI headers w/ hardcoding BPF_FUNC_xxx values in bpf_helpers.h. So there is now no dependency on any specific kernel version there.
Jiri