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X-HELO: calimero.vinschen.de
Date: Wed, 22 Jun 2016 17:36:52 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: Piping on 64-bit Cygwin was Re: [ANNOUNCEMENT] llvm 3.7.1-2
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On Jun 22 09:29, Warren Young wrote:
> On Jun 22, 2016, at 6:39 AM, Marco Atzeri <marco DOT atzeri AT gmail DOT com> wrote:
> >=20
> >=20
> > may be is a piping problem, but there is no evidence; it could be a lot=
 of different issues due to 64bit porting.
> > I will not be surprise if there is wrong assumption on data size.
>=20
> That=E2=80=99s my guess, too.
>=20
> 64-bit Windows is LLP64, while 64-bit Linux is LP64 on the same hardware.

s/Linux/Linux and Cygwin/

> That means that any binary protocol that uses C=E2=80=99s =E2=80=9Clong=
=E2=80=9D data type
> will do the wrong thing on Cygwin, because it uses Windows=E2=80=99 data =
size
> rules for ABI compatibility with Windows.
>=20
> See https://en.wikipedia.org/wiki/64-bit_computing#64-bit_data_models

And https://cygwin.com/faq.html#faq.programming.64bitporting


Corinna

--=20
Corinna Vinschen                  Please, send mails regarding Cygwin to
Cygwin Maintainer                 cygwin AT cygwin DOT com
Red Hat

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