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From: Oleg Verych <olecom@flower.upol.cz>
To: "Jan Beulich" <jbeulich@novell.com>,
	Oleg Verych <olecom@flower.upol.cz>, <dsd@gentoo.org>,
	<kernel@gentoo.org>, <draconx@gmail.com>, <jpdenheijer@gmail.com>,
	"Andrew Morton" <akpm@osdl.org>,
	"Sam Ravnborg" <sam@ravnborg.org>, "Andi Kleen" <ak@suse.de>,
	LKML <linux-kernel@vger.kernel.org>
Subject: Re: [PATCH -mm] replacement for broken	kbuild-dont-put-temp-files-in-the-source-tree.patch
Date: Mon, 30 Oct 2006 14:42:16 +0000	[thread overview]
Message-ID: <slrnekc3q8.2vm.olecom@flower.upol.cz> (raw)
In-Reply-To: <45460E6C.76E4.0078.0@novell.com>


On 2006-10-30, Jan Beulich wrote:
>
>>>gcc does not delete files specified with -o - but binutils does.
>>>So using /dev/null in this case is not an option.
>>
>>Hmm. What's the preblem to invoke `as' via the GNU C compiler, then?
>
>Older gas, whether invoked from gcc or the command line or elsewhere,
>deletes its output on error, regardless of whether this is a special file
>(device). gcc can't make gas not do so.

So, how about (using your btmp directory) create symlink to /dev/null in
the (dev) sub-directory and then set no write permission? No tmp,
things are local to build output, old gas's happy:
,__
|olecom@flower:/tmp/_build_2.6.19-rc3/btmp
!__$ mkdir dev
,__
|olecom@flower:/tmp/_build_2.6.19-rc3/btmp
!__$ cd dev ; ln -s /dev/null null ; chmod u-w . ; ls -la
total 0
dr-xr-x--- 2 olecom root 60 2006-10-30 15:34 .
drwxr-x--- 3 olecom root 80 2006-10-30 15:34 ..
lrwxrwxrwx 1 olecom root  9 2006-10-30 15:34 null -> /dev/null
,__
|olecom@flower:/tmp/_build_2.6.19-rc3/btmp/dev
!__$ cd .. ; rm dev/null
rm: cannot remove dev/null': Permission denied
,__
|olecom@flower:/tmp/_build_2.6.19-rc3/btmp
!__$ echo ok > dev/null
,__
|olecom@flower:/tmp/_build_2.6.19-rc3/btmp
!__$

New featured dev/null may be set in some kind of make variable, say
$(null) in scripts/Kbuild.include.
____

  parent reply	other threads:[~2006-10-30 14:35 UTC|newest]

Thread overview: 25+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2006-10-28 23:07 Horst Schirmeier
2006-10-29  2:07 ` Andi Kleen
2006-10-29 12:08   ` Horst Schirmeier
2006-10-29 16:16     ` Andi Kleen
2006-10-29 17:52       ` Oleg Verych
2006-10-29 22:52         ` Sam Ravnborg
2006-10-30  8:16           ` Jan Beulich
2006-10-30 13:16             ` Oleg Verych
     [not found]               ` <45460E6C.76E4.0078.0@novell.com>
2006-10-30 14:42                 ` Oleg Verych [this message]
2006-10-30 15:22                   ` Valdis.Kletnieks
2006-10-30 16:06                     ` Oleg Verych
2006-10-30 22:12                       ` Oleg Verych
2006-10-31  0:12                         ` Horst Schirmeier
2006-10-31  0:19                           ` Andi Kleen
2006-10-31  1:14                             ` Horst Schirmeier
2006-10-31 13:51                               ` Oleg Verych
2006-11-02 12:46                                 ` Jan Peter den Heijer
2006-11-17  5:17                                 ` kbuild: O= with M= (Re: [PATCH -mm] replacement for broken kbuild-dont-put-temp-files-in-the-source-tree.patch) Oleg Verych
2007-01-23  7:36                                   ` [fix, rfc] " Oleg Verych
2007-01-24  8:54                                 ` [patch] kbuild: improving option checking " Oleg Verych
2007-01-24 16:06                                   ` Randy Dunlap
2007-01-24 19:28                                     ` [patch] spell 4 kbuild: improving option checking Oleg Verych
2006-10-31  0:27                         ` [PATCH -mm] replacement for broken kbuild-dont-put-temp-files-in-the-source-tree.patch Horst Schirmeier
2006-10-31 13:32                           ` Oleg Verych
2006-11-15 14:17                           ` kbuild-mm: $(objtree)/knull vs mktemp (was Re: [PATCH -mm] replacement for broken kbuild-dont-put-temp-files-in-the-source-tree.patch) Oleg Verych

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