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

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Date:   Sat, 7 Mar 2020 00:07:12 +0900
From:   Masami Hiramatsu <mhiramat@...nel.org>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>,
        Randy Dunlap <rdunlap@...radead.org>
Cc:     Steven Rostedt <rostedt@...dmis.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>
Subject: Re: [BUGFIX PATCH] tools: Let O= makes handle a relative path with
 -C option

Thanks Geert,

So Randy, what you will get if you add "echo $(PWD)" instead of "cd $(PWD)" ?
Is that still empty or shows the tools/bootconfig directory?

Thanks,


On Fri, 6 Mar 2020 08:52:40 +0100
Geert Uytterhoeven <geert@...ux-m68k.org> wrote:

> CC +kbuild, -stable
> 
> On Thu, Mar 5, 2020 at 7:03 AM Masami Hiramatsu <mhiramat@...nel.org> wrote:
> > When I compiled tools/bootconfig from top directory with
> > -C option, the O= option didn't work correctly if I passed
> > a relative path.
> >
> >   $ make O=./builddir/ -C tools/bootconfig/
> >   make: Entering directory '/home/mhiramat/ksrc/linux/tools/bootconfig'
> >   ../scripts/Makefile.include:4: *** O=./builddir/ does not exist.  Stop.
> >   make: Leaving directory '/home/mhiramat/ksrc/linux/tools/bootconfig'
> >
> > 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 $(PWD) and check O=
> > directory, since the PWD is set to where the make command
> > runs.
> >
> > Fixes: c883122acc0d ("perf tools: Let O= makes handle relative paths")
> > Reported-by: Randy Dunlap <rdunlap@...radead.org>
> > Signed-off-by: Masami Hiramatsu <mhiramat@...nel.org>
> > ---
> >  tools/scripts/Makefile.include |    4 ++--
> >  1 file changed, 2 insertions(+), 2 deletions(-)
> >
> > diff --git a/tools/scripts/Makefile.include b/tools/scripts/Makefile.include
> > index ded7a950dc40..6d2f3a1b2249 100644
> > --- a/tools/scripts/Makefile.include
> > +++ b/tools/scripts/Makefile.include
> > @@ -1,8 +1,8 @@
> >  # SPDX-License-Identifier: GPL-2.0
> >  ifneq ($(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),)
> >


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