From: Alan Cox <alan@lxorguk.ukuu.org.uk>
To: Rob Landley <rob@landley.net>
Cc: daniel.santos@pobox.com, Daniel Santos <danielfsantos@att.net>,
Andrew Morton <akpm@linux-foundation.org>,
Christopher Li <sparse@chrisli.org>,
David Daney <david.daney@cavium.com>,
David Howells <dhowells@redhat.com>,
David Rientjes <rientjes@google.com>,
Hidetoshi Seto <seto.hidetoshi@jp.fujitsu.com>,
"H. Peter Anvin" <hpa@zytor.com>, Ingo Molnar <mingo@elte.hu>,
Ingo Molnar <mingo@kernel.org>, Joe Perches <joe@perches.com>,
Konstantin Khlebnikov <khlebnikov@openvz.org>,
linux-doc@vger.kernel.org, linux-sparse@vger.kernel.org,
LKML <linux-kernel@vger.kernel.org>,
Paul Gortmaker <paul.gortmaker@windriver.com>,
Paul Turner <pjt@google.com>, Pavel Pisa <pisa@cmp.felk.cvut.cz>,
Peter Zijlstra <a.p.zijlstra@chello.nl>,
Richard Weinberger <richard@nod.at>,
Steven Rostedt <rostedt@goodmis.org>,
Suresh Siddha <suresh.b.siddha@intel.com>
Subject: Re: [PATCH v4 0/13] Generic Red-Black Trees
Date: Sun, 24 Jun 2012 17:06:07 +0100 [thread overview]
Message-ID: <20120624170607.1584c278@pyramind.ukuu.org.uk> (raw)
In-Reply-To: <4FE69A14.6040904@landley.net>
> > Forgive me, but I'm a little stumped here. When did GCC move to a
> > "non-open" license?
It didn't
> About when it decided anti-tivoization was within its mandate, so
A lot of consider the GPLv2 license has the same requirement
> That said, reducing code duplication is a good thing. I'm just not
> convinced "how well gcc 4.6 optimizes this" is the only relevant test
> criteria here.
It is for the other 99.999999999% of users.
> LLVM/CLANG is bsd licensed (alas, with advertising clause, but code from
> it might actually be incorporatable into the linux kernel, unlke gcc,
> which is under a license extensively incompatible with the linux kernel).
Advertising clause BSD is not GPL compatible.
> Ok, so "designed with gcc 4.6's optimizer in mind, regression tested
> back to 3.4 for at least minimal functionality, and not intentionally
> breaking other compilers".
If you want it to work with weird cornercase compilers its for your
benefit so it's your problem and you do the work. Thats how free software
works. At the point lots of people starting using your compiler it might
matter more and if everyone starts using your compiler then it'll end up
being the primary optimisation target.
Alan
next prev parent reply other threads:[~2012-06-24 16:03 UTC|newest]
Thread overview: 28+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-06-23 4:00 Daniel Santos
2012-06-23 4:00 ` [PATCH v4 1/13] compiler-gcc4.h: Correct verion check for __compiletime_error Daniel Santos
2012-06-23 4:00 ` [PATCH v4 2/13] compiler-gcc4.h: Reorder macros based upon gcc ver Daniel Santos
2012-06-23 4:00 ` [PATCH v4 3/13] compiler-gcc.h: Add gcc-recommended GCC_VERSION macro Daniel Santos
2012-06-23 4:00 ` [PATCH v4 4/13] compiler-gcc{3,4}.h: Use " Daniel Santos
2012-06-23 4:00 ` [PATCH v4 5/13] compiler{,-gcc4}.h: Remove duplicate macros Daniel Santos
2012-06-23 4:00 ` [PATCH v4 6/13] bug.h: Replace __linktime_error with __compiletime_error Daniel Santos
2012-06-25 18:16 ` Paul Gortmaker
2012-06-25 19:30 ` Daniel Santos
2012-06-23 4:00 ` [PATCH v4 7/13] compiler{,-gcc4}.h: Introduce __flatten function attribute Daniel Santos
2012-06-23 4:00 ` [PATCH v4 8/13] bug.h: Make BUILD_BUG_ON generate compile-time error Daniel Santos
2012-06-23 4:00 ` [PATCH v4 9/13] bug.h: Add BUILD_BUG_ON_NON_CONST macro Daniel Santos
2012-06-23 4:00 ` [PATCH v4 10/13] bug.h: Add gcc 4.2+ versions of BUILD_BUG_ON_* macros Daniel Santos
2012-06-23 4:00 ` [PATCH v4 11/13] rbtree.h: Generic Red-Black Trees Daniel Santos
2012-06-27 13:00 ` Peter Zijlstra
2012-06-23 4:00 ` [PATCH v4 12/13] fair.c: Use generic rbtree impl in fair scheduler Daniel Santos
2012-06-26 12:15 ` Peter Zijlstra
2012-06-26 21:59 ` Daniel Santos
2012-06-27 12:36 ` Peter Zijlstra
2012-06-23 4:00 ` [PATCH v4 13/13] documentation for rbtrees Daniel Santos
2012-06-23 23:01 ` [PATCH v4 0/13] Generic Red-Black Trees Rob Landley
2012-06-24 0:40 ` Daniel Santos
2012-06-24 4:39 ` Rob Landley
2012-06-24 7:57 ` Pavel Pisa
2012-06-24 23:29 ` Rob Landley
2012-06-25 8:35 ` Daniel Santos
2012-06-24 16:06 ` Alan Cox [this message]
2012-06-25 0:33 ` Daniel Santos
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