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Date: Sat, 2 May 2015 15:09:40 +0200
From: Corinna Vinschen <corinna-cygwin AT cygwin DOT com>
To: cygwin AT cygwin DOT com
Subject: Re: [64bit] cygwin-devel headers broken
Message-ID: <20150502130940.GA12723@calimero.vinschen.de>
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On May  1 14:38, Eric Blake wrote:
> On 05/01/2015 02:12 PM, Marco Atzeri wrote:
> >>> It seems that sys/select.h is no longer implicitly included by some
> >>> other header, I think probably sys/time.h.
>=20
> POSIX says:
>=20
> http://pubs.opengroup.org/onlinepubs/9699919799/basedefs/sys_time.h.html#=
tag_13_64
>=20
> "Inclusion of the <sys/time.h> header may make visible all symbols from
> the <sys/select.h> header."
>=20
> which means <sys/time.h> may (but not must) pollute the namespace with
> select().  This means two things:
>=20
> 1. Portable applications should not depend on the pollution (so
> reporting it to upstream projects is the right thing to do)
>=20
> 2. Cygwin should do better at emulating Linux and include the namespace
> pollution, for the sake of applications that have not yet been patched.

I screwed that up, didn't I?

This is a result of the newlib change to sys/time.h.  It has been
updated to the latest stuff from FreeBSD in March.

Before, we had a <cygwin/sys_time.h> header which defines futimes and
lutimes.  Since these symbols are now defined in newlib's new sys/time.h,
I concluded razor-sharp, that we don't need the cygwin-specific
cygwin/sys_time.h anymore.

Unfortunately I missed the fact that this file also includes <sys/select.h>.

> Anyone want to tackle the patch to cygwin's sys/time.h?

I applied a patch.  A new version of Cygwin has to wait until I'm back
from vaca, sorry.


Corinna

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

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