Bug 923919 – dev-libs/libbpf-1.3.0 fails to compile: ld.lld: error: version script assignment of LIBBPF_0.3.0 to symbol btf__new_split failed: symbol not defined

• Product: Gentoo Linux
• Status: CONFIRMED ---

[Description Agostino Sarubbo 2024-02-06 11:02:29 UTC]

https://blogs.gentoo.org/ago/2020/07/04/gentoo-tinderbox/

Issue: dev-libs/libbpf-1.3.0 fails to compile.
Discovered on: amd64 (internal ref: clang-lld_tinderbox)
System: CLANG-LLD (https://wiki.gentoo.org/wiki/Project:Tinderbox/Common_Issues_Helper#CLANG-LLD)

Info about the issue:
https://wiki.gentoo.org/wiki/Project:Tinderbox/Common_Issues_Helper#CF0014

[Comment 1 Agostino Sarubbo 2024-02-06 11:02:31 UTC]

Created attachment 884359 [details]
build.log

build log and emerge --info

[Comment 2 Vic Kerr (wikky) 2024-03-12 11:55:35 UTC]

This issue also affects 1.2.2.

The following commits implement the missing APIs:
https://github.com/libbpf/libbpf/commit/95b4beb50201267a45cc193e86512996e5c7409a
https://github.com/libbpf/libbpf/commit/5b7613e50fd94b447b3cd18ae3de9dacd5d60cb9

I presume they're slated for a future 1.4 release.

I have trivially back-ported them to 1.2.2 and 1.3. Just remove the libbpf.map changes from the patches.
Alternatively, we could just remove the missing symbols from libbpf.map.

The patches don't apply cleanly as the ebuild sets S="${WORKDIR}/${P}/src" but patches apply to src/, again trivial to fix with sed.

[Comment 3 Vic Kerr (wikky) 2024-04-02 10:53:12 UTC]

libbpf-1.4.0 has been released on 1 April. The release notes mention:

> btf_ext__raw_data() and btf__new_split() APIs are added back, they were "lost" during libbpf v1.0 release process;

https://github.com/libbpf/libbpf/releases/tag/v1.4.0