X-Recipient: archive-cygwin AT delorie DOT com
DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:cc:subject:in-reply-to:message-id
	:references:mime-version:content-type; q=dns; s=default; b=AZMMw
	z1duuyOjKRCs44pLiHY/AtXytvHjA+Ft6oCpIGavt0qH+s/wAPP3hnsRU94UBRfY
	ZWw8b/bKj0o8kAigJ14FkN3u2E/6ViE3J832YmB25Wf5wX2asjed9qbbeUNXa1mV
	vWhKczoyYfPBLfHeJibEQzxaOTznme/ShzazbA=
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:date:from:to:cc:subject:in-reply-to:message-id
	:references:mime-version:content-type; s=default; bh=pcfbkyKIorc
	uyL09HyJVDZLglic=; b=jz1vgAsIe19eS5ZV75VRFb7rFF5PEDY6JP8ktXlZTud
	ewZpUBJAMual4kgSbZD0zm6d98cQ1LW/6HroIZDXeYSzM3x1bySFivbemz97CXTT
	LPSDvMVNVjmYBn8HKoeJ4RWCxGu8jxkpwiKSBREhY3jrAwHfJ3WlWjDhHRIf41ts
	=
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Authentication-Results: sourceware.org; auth=none
X-Virus-Found: No
X-Spam-SWARE-Status: No, score=-0.8 required=5.0 tests=AWL,BAYES_00 autolearn=ham version=3.3.2
X-HELO: mail.sciencetools.com
Date: Wed, 12 Feb 2014 11:06:18 -0800 (PST)
From: Richard <richard AT KarmannGhia DOT org>
To: David Conrad <DavidConrad AT acm DOT org>
cc: Andrey Repin <cygwin AT cygwin DOT com>
Subject: Re: g77 on cygwin64
In-Reply-To: <CAEotdwn+dWCyiw2a6oN987XOP2Fs6BkAfkwChe5ZH3UWs3d=Cg@mail.gmail.com>
Message-ID: <alpine.LFD.2.03.1402121103430.24343@KarmannGhia.org>
References: <52FAF082 DOT 6020805 AT appstate DOT edu> <52FB0686 DOT 8080403 AT gmail DOT com> <52FB13E2 DOT 1070107 AT appstate DOT edu> <724410821 DOT 20140212111451 AT mtu-net DOT ru> <CAMCbSMoqb_TsY3BQSU-AwnCOuCYecwCw4YexBQuUhbAbpSNDQg AT mail DOT gmail DOT com> <52FB8E3C DOT 3030704 AT appstate DOT edu> <1436686110 DOT 20140212211626 AT mtu-net DOT ru> <CAEotdwn+dWCyiw2a6oN987XOP2Fs6BkAfkwChe5ZH3UWs3d=Cg AT mail DOT gmail DOT com>
User-Agent: Alpine 2.03 (LFD 1266 2009-07-14)
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII; format=flowed
X-IsSubscribed: yes


On Wed, 12 Feb 2014, David Conrad wrote:
>
> Since the problem occurs going from 32-bit to 64-bit Cygwin, it sounds
> to me like all-the-world's-a-VAX syndrome. I bet there are places
> where it reads from files and assumes that if it reads N words into
> integers, that is N 32-bit quantities, or something like that. I
> haven't written any Fortran since the 1980s, but I bet there are types
> that have changed size due to the switch to 64-bit and that results in
> reading incorrect values from files, including reading some of them
> from the wrong file offsets, and hitting end-of-file at a different
> point.

It's called, "inadvertent varriable sharing."

Yeah, I was there, fought those battles. The proof of what was going on 
was found in crash dumps. ...This was from the era when "RISC 
architecture" meant "Relegate all the Important Sh_t to the Compiler."

Richard

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple