linux-kernel - Re: [BUGFIX PATCH v2] tools: Let O= makes handle a relative path with -C option

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Date:   Sat, 7 Mar 2020 11:27:23 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Steven Rostedt <rostedt@...dmis.org>,
        Geert Uytterhoeven <geert@...ux-m68k.org>,
        Borislav Petkov <bp@...en8.de>,
        LKML <linux-kernel@...r.kernel.org>,
        Ingo Molnar <mingo@...nel.org>,
        Randy Dunlap <rdunlap@...radead.org>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Peter Zijlstra <peterz@...radead.org>,
        Sasha Levin <sashal@...nel.org>, Jiri Olsa <jolsa@...hat.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>
Subject: Re: [BUGFIX PATCH v2] tools: Let O= makes handle a relative path
 with -C option

On Fri, 6 Mar 2020 17:12:03 -0300
Arnaldo Carvalho de Melo <acme@...nel.org> wrote:

> Em Sat, Mar 07, 2020 at 03:32:58AM +0900, Masami Hiramatsu escreveu:
> > When I compiled tools/perf from top directory with the -C option,
> > the O= option didn't work correctly if I passed a relative path.
> > 
> >   $ make O=BUILD -C tools/perf/
> >   make: Entering directory '/home/mhiramat/ksrc/linux/tools/perf'
> >     BUILD:   Doing 'make -j8' parallel build
> >   ../scripts/Makefile.include:4: *** O=/home/mhiramat/ksrc/linux/tools/perf/BUILD does not exist.  Stop.
> >   make: *** [Makefile:70: all] Error 2
> >   make: Leaving directory '/home/mhiramat/ksrc/linux/tools/perf'
> > 
> > The O= directory existence check failed because the check
> > script ran in the build target directory instead of the
> > directory where I ran the make command.
> > 
> > To fix that, once change directory to $(PWD) and check O=
> > directory, since the PWD is set to where the make command
> > runs.
> 
> Tested with O=/non/relative/paths, as I always use, not to polute the
> checked out kerneo sources, and with a relative path, as fixed in this
> patch, now both works, thanks, will be in my next perf/urgent pull req
> to Ingo.
> 

Thanks Arnaldo!


> - Arnaldo
>  
> > Fixes: c883122acc0d ("perf tools: Let O= makes handle relative paths")
> > Reported-by: Randy Dunlap <rdunlap@...radead.org>
> > Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
> > Cc: stable@...r.kernel.org
> > 
> > ---
> >  Changes in V2:
> >  - Fix tools/perf/Makefile because it has own O= pre-process.
> >  - Use tools/perf for example.
> >  - Add explicit Cc: stable@...r.kernel.org tag.
> > ---
> >  tools/perf/Makefile            |    2 +-
> >  tools/scripts/Makefile.include |    4 ++--
> >  2 files changed, 3 insertions(+), 3 deletions(-)
> > 
> > diff --git a/tools/perf/Makefile b/tools/perf/Makefile
> > index 7902a5681fc8..b8fc7d972be9 100644
> > --- a/tools/perf/Makefile
> > +++ b/tools/perf/Makefile
> > @@ -35,7 +35,7 @@ endif
> >  # Only pass canonical directory names as the output directory:
> >  #
> >  ifneq ($(O),)
> > -  FULL_O := $(shell readlink -f $(O) || echo $(O))
> > +  FULL_O := $(shell cd $(PWD); readlink -f $(O) || echo $(O))
> >  endif
> >  
> >  #
> > diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include
> > index ded7a950dc40..6d2f3a1b2249 100644
> > --- a/tools/scripts/Makefile.include
> > +++ b/tools/scripts/Makefile.include
> > @@ -1,8 +1,8 @@
> >  # SPDX-License-Identifier: GPL-2.0
> >  ifneq ($(O),)
> >  ifeq ($(origin O), command line)
> > -	dummy := $(if $(shell test -d $(O) || echo $(O)),$(error O=$(O) does not exist),)
> > -	ABSOLUTE_O := $(shell cd $(O) ; pwd)
> > +	dummy := $(if $(shell cd $(PWD); test -d $(O) || echo $(O)),$(error O=$(O) does not exist),)
> > +	ABSOLUTE_O := $(shell cd $(PWD); cd $(O) ; pwd)
> >  	OUTPUT := $(ABSOLUTE_O)/$(if $(subdir),$(subdir)/)
> >  	COMMAND_O := O=$(ABSOLUTE_O)
> >  ifeq ($(objtree),)
> > 
> 
> -- 
> 
> - Arnaldo


-- 
Masami Hiramatsu <mhiramat@...nel.org>