linux-kernel - Re: [PATCH 00/10] perf parse-events: enable more flex/bison warnings

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Date:   Thu, 11 Jun 2020 11:02:49 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        Andi Kleen <ak@...ux.intel.com>,
        Jin Yao <yao.jin@...ux.intel.com>,
        John Garry <john.garry@...wei.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        linux-kernel@...r.kernel.org, Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 00/10] perf parse-events: enable more flex/bison warnings

On Wed, Jun 10, 2020 at 02:50:50PM -0700, Ian Rogers wrote:
> All C compiler warnings are disabled are disabled by -w. This change
> removes the -w from flex and bison targets. To avoid implicit
> declarations header files are declared as targets and included.
> 
> Tested with GCC 9.3.0 and clang 9.0.1.
> 
> Previously posted as a single change:
> https://lore.kernel.org/lkml/20200609234344.3795-2-irogers@google.com/
> 
> Ian Rogers (10):
>   perf parse-events: Use automatic variable for flex input
>   perf parse-events: Use automatic variable for yacc input
>   perf pmu: Add bison debug build flag
>   perf pmu: Add flex debug build flag
>   perf parse-events: Declare flex header file output
>   perf parse-events: Declare bison header file output
>   perf parse-events: Disable a subset of flex warnings
>   perf expr: Avoid implicit lex function declaration
>   perf parse-events: Avoid implicit lex function declaration
>   perf parse-events: Disable a subset of bison warnings

looks great, I wonder what the -w replacement will do in
Arnaldo's distro test, but it'd be nice to get rid it

Acked-by: Jiri Olsa <jolsa@...hat.com>

thanks,
jirka

> 
>  tools/perf/util/Build          | 50 +++++++++++++++++++++-------------
>  tools/perf/util/expr.y         |  2 ++
>  tools/perf/util/parse-events.y |  1 +
>  3 files changed, 34 insertions(+), 19 deletions(-)
> 
> -- 
> 2.27.0.278.ge193c7cf3a9-goog
>