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Date:      Mon, 23 May 2011 21:36:09 +0200
From:      Dimitry Andric <dim@FreeBSD.org>
To:        "Bjoern A. Zeeb" <bz@FreeBSD.org>
Cc:        svn-src-head@FreeBSD.org, svn-src-all@FreeBSD.org, src-committers@FreeBSD.org, Warner Losh <imp@bsdimp.com>
Subject:   Re: svn commit: r222183 - head/lib/clang
Message-ID:  <4DDAB729.8020902@FreeBSD.org>
In-Reply-To: <FBF51ECE-24D1-4F2F-8F71-36F192255C7C@FreeBSD.org>
References:  <201105221632.p4MGWjUb081825@svn.freebsd.org> <20110522202256.GA43412@freebsd.org> <20110522213058.GB21144@lonesome.com> <22621AEF-6EF3-4E07-8CBD-57D5037A7DEA@bsdimp.com> <FBF51ECE-24D1-4F2F-8F71-36F192255C7C@FreeBSD.org>

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On 2011-05-23 14:05, Bjoern A. Zeeb wrote:
> Is there an authoritative source for these names?

With regard to the 'triple' or 'quad' strings, e.g. "arch-vendor-os" or
"arch-vendor-os-abi", the canonical source is really GNU config.guess,
which is used in autoconf, gettext, and most other GNU tools.

If you look at the head revision here:
http://savannah.gnu.org/cgi-bin/viewcvs/*checkout*/config/config/config.guess

you can see that it consistently replaces any 'amd64' arch with
'x86_64'.  (Of course the hyphen in 'x86-64' had to be transformed to an
underscore, otherwise it would be mistaken for a separator.)


> I am not quite sure
> what led to the confusion in first place but I guess it's the "oh Intel
> is doing EMT64 let's not call this amd" kind of thing.

AMD originally announced their 64 bit technology under the name x86-64,
in 1999 (nice typo in the title, btw):

http://www.amd.com/us/press-releases/Pages/Press_Release_751.aspx

Later, in 2003, their marketing department apparently decided to rename
it to AMD64, and deprecate the x86-64 terminology:

http://www.x86-64.org/pipermail/discuss/2003-April/003315.html

Most likely, GNU and Linux had already picked up the x86-64 name, and
did not see much reason to rename it afterwards.

Since amd64 support got added to FreeBSD in November 2003, it looks
like we only picked this up when it was already renamed.



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