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Reply-To: Brian.Inglis@SystematicSw.ab.ca
Subject: Re: Which is it -pc- or -unknown-
To: cygwin@cygwin.com
References: <29b66287-6bd7-4e82-b35d-12a735c2070b@gmail.com> <2a7bbdb0-1a76-690f-0a2a-1f64eb612df4@SystematicSw.ab.ca> <c9341d15-006a-9ba7-ba29-33cf512e8c9b@gmail.com>
From: Brian Inglis <Brian.Inglis@SystematicSw.ab.ca>
Message-ID: <04957a74-4b00-44c9-610a-c847d1dc085a@SystematicSw.ab.ca>
Date: Tue, 17 Oct 2017 17:39:13 -0600
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On 2017-10-17 15:31, cyg Simple wrote:
> On 10/17/2017 3:45 PM, Brian Inglis wrote:
>> On 2017-10-17 13:16, cyg Simple wrote:
>>> The config.guess file[1] is confused.
>>> 840    i*:CYGWIN*:*)
>>> 841	echo ${UNAME_MACHINE}-pc-cygwin
>>> 842	exit ;;
>>> -----
>>> 870    amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*)
>>> 871	echo x86_64-unknown-cygwin
>>> 872	exit ;;
>>> The GCC executable is x86_64-pc-cygwin-gcc.exe but config.guess on my
>>> system gives x86_64-unknown-cygwin so specifying a fully qualified host
>>> doesn't find the executable file.  So which should it be?
>>> [1]http://git.savannah.gnu.org/cgit/config.git/tree/config.guess?id=c003e5cb947924ca5edd25c3b840aaa373c66b28
>> That part of the triplet is defined as vendor, so it was probably initially
>> Intel, then compatibles came out and that was genericized to PC, then someone
>> objected and discussed and came up with Unknown, rather than say Any or None.
>> It may reflect development ages of projects, autotools, defaults on projects, or
>> project politics.
>> Some projects still use PC, which may be a project override, others use Unknown,
>> which should be the default in current releases of autotools.
> So config.guess needs to change, correct?  I thought the I had
> remembered the discussion that it should be -unknown- for Cygwin.  But
> the GCC distribution is giving us -pc- instead which means the
> maintainer specified the target as such.  That needs to change as well.
> I'm on x86_64 I bet x86 will be -pc- from config.guess just by the way
> it's coded.  Confusing!

You might want to diff the upstream config.{guess,sub} with those from
/usr/share/automake1.{14,15}/ as those are the latest, and earlier releases to
see if they are just old, in case there are project customizations.
You can then decide whether you want to look further at how much of the project
automake infrastructure you want to upgrade, or check if the project has looked
at, or is working on, doing that.
If you do so, you could look at offering that back upstream.

-- 
Take care. Thanks, Brian Inglis, Calgary, Alberta, Canada

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