From: Viktor Malik on gitlab.com https://gitlab.com/cki-project/kernel-ark/-/merge_requests/3338#note_2092647212
@dzickusrh thanks for the comment! > I am curious how you handle updating bpftool package? One scenario that has been tricky in the past is a newer bpftool update using an older buildroot kernel-devel. I believe you get a vmlinux.h that is mismatched. IIUC, bpftool should be backwards-compatible with the kernel, i.e. it should be no problem if bpftool is built against `vmlinux.h` from an older kernel version than bpftool comes from. So, my plan is to basically build bpftool against the current buildroot, same as any other package. > And does the bpftool accidentally use the build system files to make checks instead of the buildroot? We had to put Makefile hacks for bpftool to inject the right vmlinux.h file and others?? into the build process to override the system files found on the AWS builders. If I understand this one correctly, it's a good point. Looking at bpftool's `Makefile`, it builds its own `vmlinux.h` from BTF and by default, it takes BTF from KBuild (which we won't have) or from the running system (which we don't want). So, I'll need to update the new bpftool specfile to pass the correct `vmlinux.h` coming from `kernel-devel`. It should be as simple as passing the path via `VMLINUX_H` build variable, though. If you have any specific cases where you think this is not sufficient, I'll be happy to look into them. -- _______________________________________________ kernel mailing list -- [email protected] To unsubscribe send an email to [email protected] Fedora Code of Conduct: https://docs.fedoraproject.org/en-US/project/code-of-conduct/ List Guidelines: https://fedoraproject.org/wiki/Mailing_list_guidelines List Archives: https://lists.fedoraproject.org/archives/list/[email protected] Do not reply to spam, report it: https://pagure.io/fedora-infrastructure/new_issue
