All of lore.kernel.org
 help / color / mirror / Atom feed
From: Florian Fainelli <florian@openwrt.org>
To: Andrew Morton <akpm@linux-foundation.org>
Cc: "H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@kernel.org>,
	Kyungsik Lee <kyungsik.lee@lge.com>,
	Michal Marek <mmarek@suse.cz>,
	"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
	linux-kbuild@vger.kernel.org, x86@kernel.org,
	celinux-dev@lists.celinuxforum.org,
	"linux-arm-kernel@lists.infradead.org" 
	<linux-arm-kernel@lists.infradead.org>,
	hyojun.im@lge.com, chan.jeong@lge.com,
	Andy Lee <raphael.andy.lee@gmail.com>,
	Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
	Russell King <rmk@arm.linux.org.uk>,
	Borislav Petkov <bp@alien8.de>,
	Yann Collet <yann.collet.73@gmail.com>,
	Chanho Min <chanho.min@lge.com>
Subject: Re: [PATCH -next 2/2] kbuild: fix for updated LZ4 tool with the new streaming format
Date: Tue, 16 Jul 2013 10:13:24 +0100	[thread overview]
Message-ID: <CAGVrzcaTMckMKUObknT8abPyOzetuHzWtNPkF=Ae4zz7huShkQ@mail.gmail.com> (raw)
In-Reply-To: <20130716005611.e4ccab02.akpm@linux-foundation.org>

2013/7/16 Andrew Morton <akpm@linux-foundation.org>:
> On Tue, 16 Jul 2013 00:47:27 -0700 Andrew Morton <akpm@linux-foundation.org> wrote:
>
>> On Mon, 15 Jul 2013 15:08:20 -0700 "H. Peter Anvin" <hpa@zytor.com> wrote:
>>
>> > On 07/15/2013 03:03 PM, Andrew Morton wrote:
>> > >
>> > > I don't know how to do this.  Any suggestions?
>> > >
>> > > It has to be done at `make config' time.  We'd need to probe for the
>> > > presence of lz4c and then....  what?
>> > >
>> > > Is there any precedent for this?
>> > >
>> > > I don't think we can just ignore the absence of lz4c - the user has
>> > > selected a config which his system cannot build.  The problem lies
>> > > within randconfig itself.
>> > >
>> >
>> > We keep running over the need to be able to have kconfig run tests on
>> > the build system (for toolchain support or for optional tools needed);
>> > running them in the Makefiles (i.e. at Kbuild time) is simply too late.
>> >
>>
>> Would it make sense to extend Kconfig's `depends'?
>>
>>       depends on $(shell-command)
>>
>> I don't know how practical that would be to implement...
>
> Or, easier and faster, run some front-end script which generates
> once-off Kconfig symbols.
>
>         if [ -x /bin/lz4c ]
>         then
>                 echo CONFIG_HAVE_LZ4C
>         fi
>
> then munge the output of that script into the Kconfig run and do
>
>         depends on HAVE_LZ4C

That does sound nice to avoid the build error, but will eventually
make it harder to diagnose why the kernel has not been compressed with
the specific compression tool, some kind of warning should also be
emitted maybe?
--
Florian

WARNING: multiple messages have this Message-ID
From: florian@openwrt.org (Florian Fainelli)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH -next 2/2] kbuild: fix for updated LZ4 tool with the new streaming format
Date: Tue, 16 Jul 2013 10:13:24 +0100	[thread overview]
Message-ID: <CAGVrzcaTMckMKUObknT8abPyOzetuHzWtNPkF=Ae4zz7huShkQ@mail.gmail.com> (raw)
In-Reply-To: <20130716005611.e4ccab02.akpm@linux-foundation.org>

2013/7/16 Andrew Morton <akpm@linux-foundation.org>:
> On Tue, 16 Jul 2013 00:47:27 -0700 Andrew Morton <akpm@linux-foundation.org> wrote:
>
>> On Mon, 15 Jul 2013 15:08:20 -0700 "H. Peter Anvin" <hpa@zytor.com> wrote:
>>
>> > On 07/15/2013 03:03 PM, Andrew Morton wrote:
>> > >
>> > > I don't know how to do this.  Any suggestions?
>> > >
>> > > It has to be done at `make config' time.  We'd need to probe for the
>> > > presence of lz4c and then....  what?
>> > >
>> > > Is there any precedent for this?
>> > >
>> > > I don't think we can just ignore the absence of lz4c - the user has
>> > > selected a config which his system cannot build.  The problem lies
>> > > within randconfig itself.
>> > >
>> >
>> > We keep running over the need to be able to have kconfig run tests on
>> > the build system (for toolchain support or for optional tools needed);
>> > running them in the Makefiles (i.e. at Kbuild time) is simply too late.
>> >
>>
>> Would it make sense to extend Kconfig's `depends'?
>>
>>       depends on $(shell-command)
>>
>> I don't know how practical that would be to implement...
>
> Or, easier and faster, run some front-end script which generates
> once-off Kconfig symbols.
>
>         if [ -x /bin/lz4c ]
>         then
>                 echo CONFIG_HAVE_LZ4C
>         fi
>
> then munge the output of that script into the Kconfig run and do
>
>         depends on HAVE_LZ4C

That does sound nice to avoid the build error, but will eventually
make it harder to diagnose why the kernel has not been compressed with
the specific compression tool, some kind of warning should also be
emitted maybe?
--
Florian

  parent reply	other threads:[~2013-07-16  9:14 UTC|newest]

Thread overview: 110+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-05-06  8:42 [PATCH -next 1/2] arm: Remove enforced Os flag for LZ4 decompressor Kyungsik Lee
2013-05-06  8:42 ` Kyungsik Lee
2013-05-06  8:42 ` [PATCH -next 2/2] kbuild: fix for updated LZ4 tool with the new streaming format Kyungsik Lee
2013-05-06  8:42   ` Kyungsik Lee
2013-05-06  9:51   ` Borislav Petkov
2013-05-06  9:51     ` Borislav Petkov
2013-07-10  8:12     ` Geert Uytterhoeven
2013-07-10  8:12       ` Geert Uytterhoeven
2013-07-10  8:12       ` Geert Uytterhoeven
2013-07-10  9:36       ` Borislav Petkov
2013-07-10  9:36         ` Borislav Petkov
2013-07-10  9:36         ` Borislav Petkov
2013-07-10 18:28         ` Markus Trippelsdorf
2013-07-10 18:28           ` Markus Trippelsdorf
2013-07-10 18:28           ` Markus Trippelsdorf
2013-07-10 18:28           ` Markus Trippelsdorf
2013-07-10 20:01           ` Borislav Petkov
2013-07-10 20:01             ` Borislav Petkov
2013-07-10 20:01             ` Borislav Petkov
2013-07-10 20:01             ` Borislav Petkov
2013-07-11  4:34           ` Kyungsik Lee
2013-07-11  4:34             ` Kyungsik Lee
2013-07-11  4:34             ` Kyungsik Lee
2013-07-11  4:34             ` Kyungsik Lee
2013-07-11  9:46             ` [PATCH] .gitignore: ignore *.lz4 files Markus Trippelsdorf
2013-07-11  9:46               ` Markus Trippelsdorf
2013-07-11  9:46               ` Markus Trippelsdorf
2013-07-11  9:46               ` Markus Trippelsdorf
2013-07-12  7:56   ` [PATCH -next 2/2] kbuild: fix for updated LZ4 tool with the new streaming format Ingo Molnar
2013-07-12  7:56     ` Ingo Molnar
2013-07-12  8:01     ` Borislav Petkov
2013-07-12  8:01       ` Borislav Petkov
2013-07-12 10:13       ` Ingo Molnar
2013-07-12 10:13         ` Ingo Molnar
2013-07-12 10:23         ` Borislav Petkov
2013-07-12 10:23           ` Borislav Petkov
2013-07-12 11:18           ` Andrew Morton
2013-07-12 11:18             ` Andrew Morton
2013-07-12 12:06             ` Ingo Molnar
2013-07-12 12:06               ` Ingo Molnar
2013-07-12 12:13             ` Borislav Petkov
2013-07-12 12:13               ` Borislav Petkov
2013-07-12 12:34               ` Florian Fainelli
2013-07-12 12:34                 ` Florian Fainelli
2013-07-12 12:34                 ` Florian Fainelli
2013-07-12 12:46                 ` Borislav Petkov
2013-07-12 12:46                   ` Borislav Petkov
2013-07-12 12:46                   ` Borislav Petkov
2013-07-15 22:03     ` Andrew Morton
2013-07-15 22:03       ` Andrew Morton
2013-07-15 22:08       ` H. Peter Anvin
2013-07-15 22:08         ` H. Peter Anvin
2013-07-16  7:47         ` Andrew Morton
2013-07-16  7:47           ` Andrew Morton
2013-07-16  7:56           ` Andrew Morton
2013-07-16  7:56             ` Andrew Morton
2013-07-16  8:08             ` Yann E. MORIN
2013-07-16  8:08               ` Yann E. MORIN
2013-07-16  8:27               ` Andrew Morton
2013-07-16  8:27                 ` Andrew Morton
2013-07-16  9:05                 ` Borislav Petkov
2013-07-16  9:05                   ` Borislav Petkov
2013-07-16  9:12                   ` Yann E. MORIN
2013-07-16  9:12                     ` Yann E. MORIN
2013-07-16  9:22                     ` Borislav Petkov
2013-07-16  9:22                       ` Borislav Petkov
2013-07-16  9:32                       ` Yann E. MORIN
2013-07-16  9:32                         ` Yann E. MORIN
2013-07-16  9:38                         ` Borislav Petkov
2013-07-16  9:38                           ` Borislav Petkov
2013-07-16  9:45                           ` Yann E. MORIN
2013-07-16  9:45                             ` Yann E. MORIN
2013-07-16  9:59                             ` Borislav Petkov
2013-07-16  9:59                               ` Borislav Petkov
2013-07-16 10:04                               ` Florian Fainelli
2013-07-16 10:04                                 ` Florian Fainelli
2013-07-16 10:04                                 ` Florian Fainelli
2013-07-16 18:04               ` Sam Ravnborg
2013-07-16 18:04                 ` Sam Ravnborg
2013-07-17 21:16                 ` Sam Ravnborg
2013-07-17 21:16                   ` Sam Ravnborg
2013-07-17 21:44                   ` Borislav Petkov
2013-07-17 21:44                     ` Borislav Petkov
2013-07-17 22:30                   ` Yann E. MORIN
2013-07-17 22:30                     ` Yann E. MORIN
2013-07-17 23:22                     ` H. Peter Anvin
2013-07-17 23:22                       ` H. Peter Anvin
2013-07-18  8:02                       ` Geert Uytterhoeven
2013-07-18  8:02                         ` Geert Uytterhoeven
2013-07-18  8:02                         ` Geert Uytterhoeven
2013-07-18  7:22                     ` Geert Uytterhoeven
2013-07-18  7:22                       ` Geert Uytterhoeven
2013-07-18  7:22                       ` Geert Uytterhoeven
2013-07-18  7:34                       ` Andrew Morton
2013-07-18  7:34                         ` Andrew Morton
2013-07-18  7:34                         ` Andrew Morton
2013-07-18  7:47                         ` Yann E. MORIN
2013-07-18  7:47                           ` Yann E. MORIN
2013-07-18  7:47                           ` Yann E. MORIN
2013-07-18  7:52                           ` Andrew Morton
2013-07-18  7:52                             ` Andrew Morton
2013-07-18  7:52                             ` Andrew Morton
2013-07-18 20:47                     ` Sam Ravnborg
2013-07-18 20:47                       ` Sam Ravnborg
2013-07-16  9:13             ` Florian Fainelli [this message]
2013-07-16  9:13               ` Florian Fainelli
2013-07-16  9:13               ` Florian Fainelli
2013-07-16  9:25               ` Yann E. MORIN
2013-07-16  9:25                 ` Yann E. MORIN
2013-07-16  9:25                 ` Yann E. MORIN

Reply instructions:

You may reply publicly to this message via plain-text email
using any one of the following methods:

* Save the following mbox file, import it into your mail client,
  and reply-to-all from there: mbox

  Avoid top-posting and favor interleaved quoting:
  https://en.wikipedia.org/wiki/Posting_style#Interleaved_style

* Reply using the --to, --cc, and --in-reply-to
  switches of git-send-email(1):

  git send-email \
    --in-reply-to='CAGVrzcaTMckMKUObknT8abPyOzetuHzWtNPkF=Ae4zz7huShkQ@mail.gmail.com' \
    --to=florian@openwrt.org \
    --cc=akpm@linux-foundation.org \
    --cc=bp@alien8.de \
    --cc=celinux-dev@lists.celinuxforum.org \
    --cc=chan.jeong@lge.com \
    --cc=chanho.min@lge.com \
    --cc=hpa@zytor.com \
    --cc=hyojun.im@lge.com \
    --cc=kyungsik.lee@lge.com \
    --cc=linux-arm-kernel@lists.infradead.org \
    --cc=linux-kbuild@vger.kernel.org \
    --cc=linux-kernel@vger.kernel.org \
    --cc=mingo@elte.hu \
    --cc=mingo@kernel.org \
    --cc=mmarek@suse.cz \
    --cc=raphael.andy.lee@gmail.com \
    --cc=rmk@arm.linux.org.uk \
    --cc=tglx@linutronix.de \
    --cc=x86@kernel.org \
    --cc=yann.collet.73@gmail.com \
    --subject='Re: [PATCH -next 2/2] kbuild: fix for updated LZ4 tool with the new streaming format' \
    /path/to/YOUR_REPLY

  https://kernel.org/pub/software/scm/git/docs/git-send-email.html

* If your mail client supports setting the In-Reply-To header
  via mailto: links, try the mailto: link

This is an external index of several public inboxes,
see mirroring instructions on how to clone and mirror
all data and code used by this external index.