linux-kernel - Re: [PATCH] perf: python: Fix build when PYTHON

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Date:   Thu, 28 Jul 2022 16:26:15 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Ian Rogers <irogers@...gle.com>
Cc:     James Clark <james.clark@....com>,
        linux-perf-users@...r.kernel.org,
        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>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] perf: python: Fix build when PYTHON_CONFIG is user
 supplied

Em Thu, Jul 28, 2022 at 09:37:32AM -0700, Ian Rogers escreveu:
> On Thu, Jul 28, 2022 at 2:40 AM James Clark <james.clark@....com> wrote:
> >
> > The previous change to Python autodetection had a small mistake where
> > the auto value was used to determine the Python binary, rather than the
> > user supplied value. The Python binary is only used for one part of the
> > build process, rather than the final linking, so it was producing
> > correct builds in most scenarios, especially when the auto detected
> > value matched what the user wanted, or the system only had a valid set
> > of Pythons.
> >
> > Change it so that the Python binary path is derived from either the
> > PYTHON_CONFIG value or PYTHON value, depending on what is specified by
> > the user. This was the original intention.
> >
> > This error was spotted in a build failure an odd cross compilation
> > environment after commit 4c41cb46a732fe82 ("perf python: Prefer
> > python3") was merged.
> >
> > Fixes: 630af16eee495f58 ("perf tools: Use Python devtools for version autodetection rather than runtime")
> > Signed-off-by: James Clark <james.clark@....com>
> 
> Acked-by: Ian Rogers <irogers@...gle.com>

Thanks, applied.

- Arnaldo

 
> Thanks,
> Ian
> 
> > ---
> >  tools/perf/Makefile.config | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/tools/perf/Makefile.config b/tools/perf/Makefile.config
> > index d3c254c0f5c6..a69da9f34486 100644
> > --- a/tools/perf/Makefile.config
> > +++ b/tools/perf/Makefile.config
> > @@ -265,7 +265,7 @@ endif
> >  # defined. get-executable-or-default fails with an error if the first argument is supplied but
> >  # doesn't exist.
> >  override PYTHON_CONFIG := $(call get-executable-or-default,PYTHON_CONFIG,$(PYTHON_AUTO))
> > -override PYTHON := $(call get-executable-or-default,PYTHON,$(subst -config,,$(PYTHON_AUTO)))
> > +override PYTHON := $(call get-executable-or-default,PYTHON,$(subst -config,,$(PYTHON_CONFIG)))
> >
> >  grep-libs  = $(filter -l%,$(1))
> >  strip-libs  = $(filter-out -l%,$(1))
> > --
> > 2.28.0
> >

-- 

- Arnaldo