Re: [PATCH stable 6.1 v2 5/5] perf build: Remove -Wno-unused-but-set-variable from the flex flags when building with clang < 13.0.0

[Greg KH]

On Wed, May 20, 2026 at 09:33:20AM -0700, Florian Fainelli wrote:
> From: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
> 
> clang < 13.0.0 doesn't grok -Wno-unused-but-set-variable, so just remove
> it to avoid:
> 
>   error: unknown warning option '-Wno-unused-but-set-variable'; did you mean '-Wno-unused-const-variable'? [-Werror,-Wunknown-warning-option]
>   make[4]: *** [/git/perf-6.5.0-rc4/tools/build/Makefile.build:128: /tmp/build/perf/util/pmu-flex.o] Error 1
>   make[4]: *** Waiting for unfinished jobs....
> 
> Fixes: ddc8e4c966923ad1 ("perf build: Disable fewer bison warnings")
> Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
> Cc: Ian Rogers <irogers@xxxxxxxxxx>
> Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
> Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
> Link: https://lore.kernel.org/lkml/ZNUSWr52jUnVaaa%2F@xxxxxxxxxx/
> Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
> Signed-off-by: Florian Fainelli <florian.fainelli@xxxxxxxxxxxx>
> ---
>  tools/perf/util/Build | 20 +++++++++++++++++---
>  1 file changed, 17 insertions(+), 3 deletions(-)
> 

Oops, no upstream git id?  What is it?

thanks,

greg k-h