Re: [BUG] Xen build error - undefined reference to bpf_program__set_socket_filter

[Jan Beulich <jbeulich@xxxxxxxx>]

On 17.10.2022 10:12, Arthur Borsboom wrote:
> Xen 4.16.1, 4.16.2 and 4.17.0-rc1 don't build anymore in Arch Linux.

That is, qemu doesn't build. That's something to be taken care of there,
not in Xen, I think.

Jan

> I believe it is caused by the missing function
> bpf_program__set_socket_filter provided by libbpf.
> This function has been deprecated in v0.8 and has been removed in v1.0.
> 
> Arch Linux uses libbpf v1.0.1 since October 2022.
> A downgrade to libbpf v0.8.1 fixes the Xen build problem.
> 
> Source about the deprecation:
> https://libbpf-test.readthedocs.io/en/latest/api.html
> 
> Build error:
> 
> /bin/ld: libcommon.fa.p/ebpf_ebpf_rss.c.o: in function `ebpf_rss_load':
> /home/arthur/.cache/yay/xen/src/xen-4.16.1/tools/qemu-xen-build/../qemu-xen/ebpf/ebpf_rss.c:52:
> undefined reference to `bpf_program__set_socket_filter'
> collect2: error: ld returned 1 exit status
> ...
> ...
> ninja: build stopped: subcommand failed.
> make: *** [Makefile:156: run-ninja] Error 1
> make: Leaving directory
> '/home/arthur/.cache/yay/xen/src/xen-4.16.1/tools/qemu-xen-build'
> make[3]: *** [Makefile:212: subdir-all-qemu-xen-dir] Error 2
> make[3]: Leaving directory
> '/home/arthur/.cache/yay/xen/src/xen-4.16.1/tools'
> make[2]: ***
> [/home/arthur/.cache/yay/xen/src/xen-4.16.1/tools/../tools/Rules.mk:161:
> subdirs-install] Error 2
> make[2]: Leaving directory
> '/home/arthur/.cache/yay/xen/src/xen-4.16.1/tools'
> make[1]: *** [Makefile:66: install] Error 2
> make[1]: Leaving directory
> '/home/arthur/.cache/yay/xen/src/xen-4.16.1/tools'
> make: *** [Makefile:140: install-tools] Error 2
> ==> ERROR: A failure occurred in build().
> Aborting...
> -> error making: xen
>