Re: ANNOUNCE: pahole v1.23 (BTF tags and alignment inference)

Jan Engelhardt
2021-12-08T19:11:09Z

On Wednesday 2021-12-08 19:35, Arnaldo Carvalho de Melo wrote:

>Em Wed, Dec 08, 2021 at 03:26:31PM +0100, Jan Engelhardt escreveu:
>>
>> On Wednesday 2021-12-08 14:54, Arnaldo Carvalho de Melo wrote:
>> >
>> > The v1.23 release of pahole and its friends is out, this time
>> >the main new features are the ability to encode BTF tags, to carry
>>
>> [ 7s] /home/abuild/rpmbuild/BUILD/dwarves-1.23/btf_encoder.c:145:10: error: 'BTF_KIND_DECL_TAG' undeclared here (not in a function); did you mean 'BTF_KIND_FLOAT'?
>>
>> libbpf-0.5.0 is present, since CMakeLists.txt checked for >= 0.4.0.
>
>My fault, knowing the flux that libbpf is in getting to 1.0 I should
>have retested with the perf tools container based tests.
>
>Can you think about some fix for that? Lemme see if BTF_KIND_DECL_TAG is
>a define or an enum...

Just bumping this line

pkg_check_modules(LIBBPF REQUIRED libbpf>=0.4.0)

to the right version would absolutely be sufficient for us. Of course, that
requires that the libbpf project itself at least manages to make tags
regularly.