linux-kernel - [next] perf build failures: libbpf.c:10946:50: error: format '%li' expects argument of type 'long int *', but argument 4 has type 'size_t *' {aka 'unsigned int *'} [-Werror=format=]

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Date:   Thu, 7 Apr 2022 15:46:53 +0530
From:   Naresh Kamboju <naresh.kamboju@...aro.org>
To:     Linux-Next Mailing List <linux-next@...r.kernel.org>,
        open list <linux-kernel@...r.kernel.org>,
        perf-users <perf-users@...aro.org>, lkft-triage@...ts.linaro.org
Cc:     Arnaldo Carvalho de Melo <acme@...nel.org>,
        NeilBrown <neilb@...e.de>, tanu235m@...il.com,
        Matthew Wilcox <willy@...radead.org>,
        Thierry Reding <thierry.reding@...il.com>,
        mgorman@...hsingularity.net,
        Andrew Morton <akpm@...ux-foundation.org>
Subject: [next] perf build failures: libbpf.c:10946:50: error: format '%li'
 expects argument of type 'long int *', but argument 4 has type 'size_t *'
 {aka 'unsigned int *'} [-Werror=format=]

perf build errors on i386 [1] on Linux next-20220407 [2]

usdt.c:1181:5: error: "__x86_64__" is not defined, evaluates to 0
[-Werror=undef]
 1181 | #if __x86_64__
      |     ^~~~~~~~~~
usdt.c:1196:5: error: "__x86_64__" is not defined, evaluates to 0
[-Werror=undef]
 1196 | #if __x86_64__
      |     ^~~~~~~~~~
cc1: all warnings being treated as errors
make[4]: *** [/builds/linux/tools/build/Makefile.build:97:
/home/tuxbuild/.cache/tuxmake/builds/1/build/libbpf/staticobjs/usdt.o]
Error 1
make[4]: *** Waiting for unfinished jobs....
  CC      /home/tuxbuild/.cache/tuxmake/builds/1/build/util/values.o
  CC      /home/tuxbuild/.cache/tuxmake/builds/1/build/tests/backward-ring-buffer.o
  CC      /home/tuxbuild/.cache/tuxmake/builds/1/build/tests/sdt.o
  CC      /home/tuxbuild/.cache/tuxmake/builds/1/build/tests/is_printable_array.o
  CC      /home/tuxbuild/.cache/tuxmake/builds/1/build/util/debug.o
  CC      /home/tuxbuild/.cache/tuxmake/builds/1/build/util/fncache.o
  CC      /home/tuxbuild/.cache/tuxmake/builds/1/build/tests/bitmap.o
  CC      /home/tuxbuild/.cache/tuxmake/builds/1/build/util/machine.o
libbpf.c: In function 'attach_uprobe':
libbpf.c:10946:50: error: format '%li' expects argument of type 'long
int *', but argument 4 has type 'size_t *' {aka 'unsigned int *'}
[-Werror=format=]
10946 |         n = sscanf(func_name, "%m[a-zA-Z0-9_.]+%li", &func, &offset);
      |                                                ~~^          ~~~~~~~
      |                                                  |          |
      |                                                  long int *
size_t * {aka unsigned int *}
      |                                                %i
cc1: all warnings being treated as errors
make[4]: *** [/builds/linux/tools/build/Makefile.build:96:
/home/tuxbuild/.cache/tuxmake/builds/1/build/libbpf/staticobjs/libbpf.o]
Error 1

metadata:
  git_ref: master
  git_repo: https://gitlab.com/Linaro/lkft/mirrors/next/linux-next
  git_sha: 2e9a9857569ec27e64d2ddd01294bbe3c736acb1
  git_describe: next-20220407
  kernel-config: https://builds.tuxbuild.com/27SL0lCnWoPP04Jn8zKQ5nEEX7i/config
  target_arch: i386

Reported-by: Linux Kernel Functional Testing <lkft@...aro.org>

--
Linaro LKFT
https://lkft.linaro.org


[1] https://builds.tuxbuild.com/27SL0lCnWoPP04Jn8zKQ5nEEX7i/
[2] https://gitlab.com/Linaro/lkft/mirrors/next/linux-next/-/jobs/2302706510