perf: tools/include/linux/kernel.h:53:17: error: comparison of distinct pointer types lacks a cast [-Werror]

perf: tools/include/linux/kernel.h:53:17: error: comparison of distinct pointer types lacks a cast [-Werror]

[Naresh Kamboju]

Building stable-rc 5.4 with gcc 7.3.0 perf build failed for x86_64
and arm64 architectures.

In file included from btf_dump.c:16:0:
btf_dump.c: In function 'btf_align_of':
perf/1.0-r9/perf-1.0/tools/include/linux/kernel.h:53:17: error:
comparison of distinct pointer types lacks a cast [-Werror]
  (void) (&_min1 == &_min2);  \
                 ^
btf_dump.c:770:10: note: in expansion of macro 'min'
   return min(sizeof(void *), t->size);
          ^~~
cc1: all warnings being treated as errors

https://ci.linaro.org/view/lkft/job/openembedded-lkft-linux-stable-rc-5.4/DISTRO=lkft,MACHINE=intel-corei7-64,label=docker-lkft/263/consoleText

- Naresh

Re: perf: tools/include/linux/kernel.h:53:17: error: comparison of distinct pointer types lacks a cast [-Werror]

[Naresh Kamboju]

On Mon, 31 Aug 2020 at 21:20, Naresh Kamboju <naresh.kamboju@linaro.org> wrote:
>
> Building stable-rc 5.4 with gcc 7.3.0 perf build failed for x86_64
> and arm64 architectures.
>
> In file included from btf_dump.c:16:0:
> btf_dump.c: In function 'btf_align_of':
> perf/1.0-r9/perf-1.0/tools/include/linux/kernel.h:53:17: error:
> comparison of distinct pointer types lacks a cast [-Werror]
>   (void) (&_min1 == &_min2);  \
>                  ^
> btf_dump.c:770:10: note: in expansion of macro 'min'
>    return min(sizeof(void *), t->size);
>           ^~~
> cc1: all warnings being treated as errors
>
> https://ci.linaro.org/view/lkft/job/openembedded-lkft-linux-stable-rc-5.4/DISTRO=lkft,MACHINE=intel-corei7-64,label=docker-lkft/263/consoleText
>
> - Naresh