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To: gentoo-dev@g.o
From: Matt Turner <mattst88@g.o>
Subject: Re: Re: New global USE flag "neon" for ARM NEON optimization(s)
Date: Fri, 23 Dec 2011 08:09:30 -0500
On Fri, Dec 23, 2011 at 4:26 AM, Duncan <1i5t5.duncan@...> wrote:
> Samuli Suominen posted on Thu, 22 Dec 2011 21:03:41 +0200 as excerpted:
>
>> i'll add USE=neon to use.desc and punt the local descriptions if nobody
>> objects
>>
>> media-libs/libpng: support ARM NEON cpu instruction set
>> media-libs/vo-aacenc: Enable neon cpu instructions
>> media-video/ffmpeg: Enables NEON optimizations for arm processors.
>> media-video/libav: Enable NEON optimizations for arm processors.
>> media-video/vlc: Enables NEON optimizations for arm processors.
>> x11-libs/pixman: Enables NEON optimizations for ARM processors.
>
> For users not familiar with the ARM arch, neon is arguably more likely to
> be associated with net-libs/neon.  Certainly that's what I would have
> immediately thought, tho my only familiarity with the library is as a
> dependency that IIRC used to trigger lots of subversion rebuilds, etc
> (now days I don't even have subversion on the system, it's all git, but
> according to equery d, neon is still required by musicbrainz).
>
> As such, to avoid confusion I'd suggest arch-neon or arm-neon (or armneon/
> archneon) if it's to be a global flag.

Ugh.

NEON (the SIMD extensions) are turned on by the neon flag much more
often than support for net-libs/neon is. Let's not rename USE flags
like this.


Replies:
Re: New global USE flag "neon" for ARM NEON optimization(s)
-- Duncan
References:
New global USE flag "neon" for ARM NEON optimization(s)
-- Samuli Suominen
Re: New global USE flag "neon" for ARM NEON optimization(s)
-- Duncan
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Updated Jun 29, 2012

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