linux-kernel - Re: [PATCH] scripts/Kbuild.include: Fix portability problem of "echo -e"

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Message-ID: <20120324223307.GC8947@sepie.suse.cz>
Date:	Sat, 24 Mar 2012 23:33:07 +0100
From:	Michal Marek <mmarek@...e.cz>
To:	Bernhard Walle <bernhard@...lle.de>
Cc:	Sam Ravnborg <sam@...nborg.org>, lacombar@...il.com,
	linux-kernel@...r.kernel.org,
	linux-kbuild <linux-kbuild@...r.kernel.org>,
	zippel@...ux-m68k.org
Subject: Re: [PATCH] scripts/Kbuild.include: Fix portability problem of "echo
 -e"

On Mon, Mar 19, 2012 at 06:44:20PM +0100, Bernhard Walle wrote:
> Am 26.02.12 22:05, schrieb Sam Ravnborg:
> > On Sun, Feb 26, 2012 at 06:51:34PM +0100, Bernhard Walle wrote:
> >> Am 26.02.12 18:48, schrieb Sam Ravnborg:
> >>>>> --- a/scripts/Kbuild.include
> >>>>> +++ b/scripts/Kbuild.include
> >>>>> @@ -104,7 +104,7 @@ as-option = $(call try-run,\
> >>>>>  # Usage: cflags-y += $(call as-instr,instr,option1,option2)
> >>>>>  
> >>>>>  as-instr = $(call try-run,\
> >>>>> -	/bin/echo -e "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -xassembler -o "$$TMP" -,$(2),$(3))
> >>>>> +	printf "%b\n" "$(1)" | $(CC) $(KBUILD_AFLAGS) -c -xassembler -o "$$TMP" -,$(2),$(3))
> >>>>>  
> >>>>>  # cc-option
> >>>>>  # Usage: cflags-y += $(call cc-option,-march=winchip-c6,-march=i586)
> >>> Roman Zippel removed use of printf in this patch: beda9f3a13bbb22cde92a45f230a02ef2afef6a9
> >>>
> >>> I cannot remember why - but it would be good if you could dig up
> >>> why - just so we do not hit an old issue again.
> >>
> >> Well, he used printf "$(1)", that's different from printf "%b\n" "$(1)"
> >> since format strings inside $(1) would be interpreted.
> > Makes good sense.
> 
> Can we merge that for 3.4? Who is responsible, i.e. whose tree?

I merged it to kbuild.git#kbuild now.

Michal
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