linux-kernel - Re: [PATCH 2/3] perf build: Use libtraceevent from the system

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Date:   Tue, 6 Dec 2022 13:30:33 -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@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        bpf@...r.kernel.org, Stephane Eranian <eranian@...gle.com>
Subject: Re: [PATCH 2/3] perf build: Use libtraceevent from the system

Em Tue, Dec 06, 2022 at 01:23:45PM -0300, Arnaldo Carvalho de Melo escreveu:
> Em Tue, Dec 06, 2022 at 01:20:12PM -0300, Arnaldo Carvalho de Melo escreveu:
> > 
> > util/scripting-engines/trace-event-perl.c:104:43: error: ‘struct tep_print_flag_sym’ declared inside parameter list will not be visible outside of this definition or declaration [-Werror]
> >   104 | static void define_symbolic_values(struct tep_print_flag_sym *field,
> >       |                                           ^~~~~~~~~~~~~~~~~~
> > util/scripting-engines/trace-event-perl.c: In function ‘define_symbolic_values’:
> 
> This cured it, folding into your patch:
> 
> diff --git a/tools/perf/util/scripting-engines/trace-event-perl.c b/tools/perf/util/scripting-engines/trace-event-perl.c
> index 5b602b6d46854133..0bacb49408f84adf 100644
> --- a/tools/perf/util/scripting-engines/trace-event-perl.c
> +++ b/tools/perf/util/scripting-engines/trace-event-perl.c
> @@ -27,6 +27,7 @@
>  #include <errno.h>
>  #include <linux/bitmap.h>
>  #include <linux/time64.h>
> +#include <traceevent/event-parse.h>
>  
>  #include <stdbool.h>
>  /* perl needs the following define, right after including stdbool.h */

Building with NO_LIBTRACEEVENT=1 I get:

  CC      /tmp/build/perf/util/cap.o
util/data-convert-bt.c: In function ‘get_tracepoint_field_type’:
util/data-convert-bt.c:194:36: error: invalid use of undefined type ‘struct tep_format_field’
  194 |         unsigned long flags = field->flags;
      |                                    ^~
util/data-convert-bt.c:196:21: error: ‘TEP_FIELD_IS_STRING’ undeclared (first use in this function)
  196 |         if (flags & TEP_FIELD_IS_STRING)
      |                     ^~~~~~~~~~~~~~~~~~~
util/data-convert-bt.c:196:21: note: each undeclared identifier is reported only once for each function it appears in
util/data-convert-bt.c:199:23: error: ‘TEP_FIELD_IS_SIGNED’ undeclared (first use in this function)
  199 |         if (!(flags & TEP_FIELD_IS_SIGNED)) {
      |                       ^~~~~~~~~~~~~~~~~~~
util/data-convert-bt.c:201:29: error: ‘TEP_FIELD_IS_LONG’ undeclared (first use in this function)
  201 |                 if (flags & TEP_FIELD_IS_LONG || flags & TEP_FIELD_IS_POINTER)
      |                             ^~~~~~~~~~~~~~~~~


working on it...