linux-kernel - Re: linux-next: build failure after merge of the perf tree

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Date:   Thu, 16 Mar 2023 20:11:11 -0300
From:   Arnaldo Carvalho de Melo <arnaldo.melo@...il.com>
To:     Stephen Rothwell <sfr@...b.auug.org.au>
CC:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Linux Next Mailing List <linux-next@...r.kernel.org>,
        irogers@...gle.com, namhyung@...nel.org
Subject: Re: linux-next: build failure after merge of the perf tree



On March 16, 2023 7:50:25 PM GMT-03:00, Stephen Rothwell <sfr@...b.auug.org.au> wrote:
>Hi all,
>
>After merging the perf tree, today's linux-next build (native perf)
>failed like this:
>
>Auto-detecting system features:
>...                         clang-bpf-co-re: [ .[32mon.[m  ]
>...                                    llvm: [ .[31mOFF.[m ]
>...                                  libcap: [ .[32mon.[m  ]
>...                                  libbfd: [ .[32mon.[m  ]
>
>make[1]: *** Deleting file '/home/sfr/next/perf/util/bpf_skel/vmlinux.h'
>libbpf: failed to find '.BTF' ELF section in /boot/vmlinux-6.0.0-5-powerpc64le
>Error: failed to load BTF from /boot/vmlinux-6.0.0-5-powerpc64le: No data available
>make[1]: *** [Makefile.perf:1075: /home/sfr/next/perf/util/bpf_skel/vmlinux.h] Error 195
>make[1]: *** Waiting for unfinished jobs....
>make: *** [Makefile.perf:236: sub-make] Error 2
>Command exited with non-zero status 2
>
>To be clear this is a native build of perf on a PPC64le host using this
>command line:
>
>make -C tools/perf -f Makefile.perf -s -O -j60 O=../perf EXTRA_CFLAGS=-Wno-psabi
>
>(I could probably remove the EXTRA_CLFAGS now that I am building with
>gcc 12.2)
>
>I don't know which commit caused this.

Can you try adding NO_BPF_SKEL=1 to the make -C tools/perf command line?

- Arnaldo

>
>I have used the perf tree from next-20230316 for today.
>
>
>