linux-kernel - Re: [PATCH v2 00/10] perf parse-events: enable more flex/bison warnings

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Date:   Fri, 19 Jun 2020 08:50:11 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Mark Rutland <mark.rutland@....com>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Jiri Olsa <jolsa@...hat.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 v2 00/10] perf parse-events: enable more flex/bison
 warnings

Em Thu, Jun 18, 2020 at 09:33:46PM -0700, Ian Rogers escreveu:
> 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.
> 
> v2. predicates disabling the warnings on more recent bison and flex
>     versions (3.5.3 and 2.6.4 respectively). An alternative would be
>     to disabled a large number of warnings to cover the warnings
>     generated in older distributions:
>   flex_flags := -Wno-switch-enum -Wno-switch-default -Wno-unused-function \
>     -Wno-redundant-decls -Wno-sign-compare -Wno-unused-parameter \
>     -Wno-missing-prototypes -Wno-misleading-indentation
>   bison_flags := -DYYENABLE_NLS=0 -Wno-unused-parameter -Wno-nested-externs \
>     -Wno-implicit-function-declaration -Wno-switch-enum
> 
> Previously posted as a single change:
> https://lore.kernel.org/lkml/20200609234344.3795-2-irogers@google.com/

So for the parts that you kept unchanged since Jiri acked it, please
next time collect that Acked-by, ok?

Going thru this now.

- Arnaldo
 
> 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
> 
>  tools/perf/util/Build          | 62 +++++++++++++++++++++++-----------
>  tools/perf/util/expr.y         |  2 ++
>  tools/perf/util/parse-events.y |  1 +
>  3 files changed, 46 insertions(+), 19 deletions(-)
> 
> -- 
> 2.27.0.111.gc72c7da667-goog
> 

-- 

- Arnaldo