linux-kernel - Re: [PATCH] scripts/gdb: Use $(abspath ...) instead of $(shell cd ... && pwd)

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Message-ID: <20160418153318.GC22979@ulmo.ba.sec>
Date:	Mon, 18 Apr 2016 17:33:18 +0200
From:	Thierry Reding <thierry.reding@...il.com>
To:	Jan Kiszka <jan.kiszka@...mens.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] scripts/gdb: Use $(abspath ...) instead of $(shell cd
 ... && pwd)

On Sun, Apr 10, 2016 at 09:04:48PM -0700, Jan Kiszka wrote:
> On 2016-04-08 02:16, Thierry Reding wrote:
> > From: Thierry Reding <treding@...dia.com>
> > 
> > Avoid forking off a shell to resolve the absolute path of the output
> > directory when make's builtin $(abspath ...) function will do an
> > adequate job.
> > 
> > Signed-off-by: Thierry Reding <treding@...dia.com>
> > ---
> >  scripts/gdb/linux/Makefile | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> > 
> > diff --git a/scripts/gdb/linux/Makefile b/scripts/gdb/linux/Makefile
> > index 6cf1ecf61057..d8b88e22e16a 100644
> > --- a/scripts/gdb/linux/Makefile
> > +++ b/scripts/gdb/linux/Makefile
> > @@ -1,6 +1,6 @@
> >  always := gdb-scripts
> >  
> > -SRCTREE := $(shell cd $(srctree) && /bin/pwd)
> > +SRCTREE := $(abspath $(srctree))
> >  
> >  $(obj)/gdb-scripts:
> >  ifneq ($(KBUILD_SRC),)
> > 
> 
> Thanks, good cleanup. Queued.

You might want to remove this, if it's not too late yet. I posted
another similar thread and people objected to it because it requires
GNU make 3.81, whereas the kernel build process officially still
supports 3.80.

Thierry

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