linux-kernel - perf bison: clang points out: error: conflicting types for 'parse_events

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Message-ID: <20170215124102.GA4020@kernel.org>
Date:   Wed, 15 Feb 2017 09:41:02 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Jiri Olsa <jolsa@...nel.org>
Cc:     Jiri Olsa <jolsa@...hat.com>, Namhyung Kim <namhyung@...nel.org>,
        Wang Nan <wangnan0@...wei.com>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: perf bison: clang points out: error: conflicting types for
 'parse_events_error' always evaluate to 'true'

Em Wed, Feb 15, 2017 at 11:50:56AM +0100, Jiri Olsa escreveu:
> On Tue, Feb 14, 2017 at 03:24:35PM -0300, Arnaldo Carvalho de Melo wrote:
> > util/pmu.c:948:28: error: address of array 'alias->unit' will always evaluate to 'true' [-Werror,-Wpointer-bool-conversion]
> >         if ((info->unit && alias->unit) ||
> >                         ~~ ~~~~~~~^~~~
> > util/pmu.c:953:13: error: address of array 'alias->unit' will always evaluate to 'true' [-Werror,-Wpointer-bool-conversion]
> >         if (alias->unit)
> >         ~~  ~~~~~~~^~~~
> > 2 errors generated.
> > 
> > 
> > So, is this test about having something on that alias->unit array? I.e.
> > should this suffice?
> 
> yep, that seems right.. good catch

Thanks, adding your Acked-by then, ok?

How about this other one:

  CC       /tmp/build/perf/util/trace-event-info.o
util/parse-events.y:699:6: error: conflicting types for 'parse_events_error'
void parse_events_error(YYLTYPE *loc, void *data,
     ^
/tmp/build/perf/util/parse-events-bison.c:2224:7: note: previous implicit declaration is here
      yyerror (&yylloc, _data, scanner, YY_("syntax error"));
      ^
/tmp/build/perf/util/parse-events-bison.c:65:25: note: expanded from macro 'yyerror'
#define yyerror         parse_events_error
                        ^
1 error generated.