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
