tighter compression for x86 kernels

tighter compression for x86 kernels

[John Reiser]

Beta release v1.11 of the UPX executable compressor http://upx.tsx.org
offers new, tighter re-compression of compressed Linux kernels for x86.
Additional space savings of about 15% have been seen using
"upx --best vmlinuz" (example: 617431 ==> 525099, saving 92332 bytes).
Both source (GPLv2) and pre-compiled binary for x86 are available.
[I'm not subscribed to this mailing list, so CC: or mail me if appropriate.]

-- 
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Re: tighter compression for x86 kernels

[Adrian Bunk]

On Wed, 20 Dec 2000, John Reiser wrote:

> Beta release v1.11 of the UPX executable compressor http://upx.tsx.org
> offers new, tighter re-compression of compressed Linux kernels for x86.
> Additional space savings of about 15% have been seen using
> "upx --best vmlinuz" (example: 617431 ==> 525099, saving 92332 bytes).
> Both source (GPLv2) and pre-compiled binary for x86 are available.
               ^^^^^
That's not true. Read
  http://wildsau.idv.uni-linz.ac.at/mfx/upx-license.html


> [I'm not subscribed to this mailing list, so CC: or mail me if appropriate.]

cu,
Adrian

-- 
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"Yes" merely uttered to please, or what is worse, to avoid trouble.
                -- Mahatma Ghandi


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Re: tighter compression for x86 kernels

[Frank v Waveren]

On Thu, Dec 21, 2000 at 12:15:13AM +0100, Adrian Bunk wrote:
> > Both source (GPLv2) and pre-compiled binary for x86 are available.
>                ^^^^^
> That's not true. Read
>   http://wildsau.idv.uni-linz.ac.at/mfx/upx-license.html

>From that page:

   UPX and the UCL library are free software; you can redistribute them
   and/or modify them under the terms of the GNU General Public License as
   published by the Free Software Foundation; either version 2 of
   the License, or (at your option) any later version.

Seems GPL2 to me. I haven't read all of the rest of the page, but
that'd either be dual licensing stuff, or further restrictions, which
would be in contradiction with the GPL.
   
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Re: tighter compression for x86 kernels

[Jens Müller]

----- Original Message -----
From: "Frank v Waveren" <fvw@var.cx>
To: "Adrian Bunk" <bunk@fs.tum.de>
Cc: "John Reiser" <jreiser@BitWagon.com>; <linux-kernel@vger.kernel.org>
Sent: Thursday, December 21, 2000 12:22 AM
Subject: Re: tighter compression for x86 kernels


> Seems GPL2 to me. I haven't read all of the rest of the page, but
> that'd either be dual licensing stuff, or further restrictions, which
> would be in contradiction with the GPL.
>
Seems to be kind of dual licensing:

"The stub which is imbedded in each UPX compressed program is part
   of UPX and UCL, and contains code that is under our copyright. The
   terms of the GNU General Public License still apply as compressing
   a program is a special form of linking with our stub.

   As a special exception we grant the free usage of UPX for all
   executables, including commercial programs.
   See below for details and restrictions."

It extends the scope of the license to _linking_ with commercial
software.

Jens




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Re: tighter compression for x86 kernels

[John Reiser]

> > Both source (GPLv2) and pre-compiled binary for x86 are available.
>                ^^^^^
> That's not true. Read
>   http://wildsau.idv.uni-linz.ac.at/mfx/upx-license.html

The UPX team owns all copyright in all of UPX and in each part of UPX.
Therefore, the UPX team may choose which license(s), and has chosen two.
One of them is GPLv2.  The UPX team understands, and fully intends
to abide by, its obligations under GPLv2 when any software that is subject
to GPLv2 is contributed to UPX and re-distributed by the UPX team.  The
other license is detailed in the LICENSE file, but may be summarized as:
free to use if unmodified, and if used only to invoke the program, and
sublicensable only under the same terms.  This permits using UPX to pack
a non-GPL executable.  Users of UPX (as distributed by the UPX team)
may choose whether to use UPX according to GPLv2, or according to
the other license.
[I am not subscribed to this mailing list, so CC: or mail me if appropriate.]

-- 
John Reiser, jreiser@BitWagon.com
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Re: tighter compression for x86 kernels

[Rob Landley]

>The UPX team owns all copyright in all of UPX and in each part of
> UPX.  Therefore, the UPX team may choose which license(s), and has
> chosen two
...
> This permits using UPX to pack a non-GPL executable.

Stupid question time: isn't this what the LGPL was designed to do?  The
Library GPL, so people who compiled stuff with gcc and linked it with
glibc wouldn't necessarily be gpl-ing their binary by doing so?  (Or the
leprosy GPL, or whatever Stallman's renamed it this month.  The license
text hasn't changed...)

Rob
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