perf python: Allow checking for the existence of warning options in clang
We'll need to check if an warning option introduced in clang 19 is available on the clang version being used, so cover the error message emitted when testing for a -W option. Tested-by:Sedat Dilek <sedat.dilek@gmail.com> Cc: Ian Rogers <irogers@google.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: https://lore.kernel.org/lkml/CA+icZUVtHn8X1Tb_Y__c-WswsO0K8U9uy3r2MzKXwTA5THtL7w@mail.gmail.comSigned-off-by:
Arnaldo Carvalho de Melo <acme@redhat.com>
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