linux-kernel - Re: wrong final bzImage build (regading #14270)

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Date:	Fri, 9 Oct 2009 22:02:51 +0200
From:	Arkadiusz Miskiewicz <a.miskiewicz@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	Michael Tokarev <mjt@....msk.ru>,
	Cyrill Gorcunov <gorcunov@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Kernel Testers List <kernel-testers@...r.kernel.org>,
	Sam Ravnborg <sam@...nborg.org>,
	"H. Peter Anvin" <hpa@...or.com>
Subject: Re: wrong final bzImage build (regading #14270)

On Friday 09 of October 2009, Michael Tokarev wrote:
> Ok, some more to this.
> 
> It turns out dash's built-in echo command interprets \nnn octal
> sequences by default, and there's no way to turn that off.  So,
> for example, sed-zoffset command from arch/x86/boot/Makefile
> (which includes \1 \2 etc substitutions for sed), when echoed
> in verbose mode (V=1), produces.. interesting characters (with
> ascii code 1 and 2).
> 
> It's not practival to replace V=1's echo with /bin/echo I think.
> 
> So I'd say it's not a bug in the build system after all, but
> a bug in dash.  

It's still a bug in build system if you consider that a /bin/sh is a posix 
shell. posix shells don't support \hex notation (see single unix system 
specification).

I had exactly this problem few weeks ago with pdksh as /bin/sh (and 
bugreported to author of that change). As I workaround I used /bin/echo but 
using printf is more sane/portable.

-- 
Arkadiusz Miśkiewicz        PLD/Linux Team
arekm / maven.pl            http://ftp.pld-linux.org/
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