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Re: [BUG] Xen build error - undefined reference to bpf_program__set_socket_filter
- To: Arthur Borsboom <arthurborsboom@xxxxxxxxx>, xen-devel <xen-devel@xxxxxxxxxxxxx>
- From: Andrew Cooper <Andrew.Cooper3@xxxxxxxxxx>
- Date: Mon, 17 Oct 2022 08:45:01 +0000
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- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
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- Thread-topic: [BUG] Xen build error - undefined reference to bpf_program__set_socket_filter
On 17/10/2022 09:12, Arthur Borsboom wrote:
> Xen 4.16.1, 4.16.2 and 4.17.0-rc1 don't build anymore in Arch Linux.
>
> 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
So while this is a build of Xen, it's actually qemu which is failing.
This can be fixed by changing the version of qemu, or dropping qemu
entirely by using ./configure --with-system-qemu= to point at the main
distro qemu package (so long as it is built with Xen support).
~Andrew
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