Mailing-List: contact cygwin-help AT sourceware DOT cygnus DOT com; run by ezmlm
List-Subscribe: <mailto:cygwin-subscribe AT sources DOT redhat DOT com>
List-Archive: <http://sources.redhat.com/ml/cygwin/>
List-Post: <mailto:cygwin AT sources DOT redhat DOT com>
List-Help: <mailto:cygwin-help AT sources DOT redhat DOT com>, <http://sources.redhat.com/ml/#faqs>
Sender: cygwin-owner AT sources DOT redhat DOT com
Delivered-To: mailing list cygwin AT sources DOT redhat DOT com
Date: Fri, 3 Aug 2001 17:43:14 -0400
From: Christopher Faylor <cgf AT redhat DOT com>
To: cygwin AT cygwin DOT com
Cc: mmillard AT vidiom DOT com
Subject: Re: Using POSIX functions in Cygwin?
Message-ID: <20010803174314.C31097@redhat.com>
Reply-To: cygwin AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com, mmillard AT vidiom DOT com
References: <NEBBLGKNALOEJBHDHMENCEEDCGAA DOT mmillard AT vidiom DOT com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
User-Agent: Mutt/1.3.11i
In-Reply-To: <NEBBLGKNALOEJBHDHMENCEEDCGAA.mmillard@vidiom.com>; from mmillard@vidiom.com on Fri, Aug 03, 2001 at 03:37:35PM -0600

On Fri, Aug 03, 2001 at 03:37:35PM -0600, Mark S. Millard wrote:
>Are there any compiler options to gcc that I need to use in order to use the
>POSIX functionality? I'm trying to use sigaction() and I can't resolve SA_*
>macros in sys/signal.h without defining __rtems__ (-D__rtems__). This
>doesn't seem right.
>
>Thank you for any help recieved.

(That's "received" -- "ei" not "ie")

sigaction is part of the cygwin DLL and there are certainly some SA_ macros
defined in ~msinclude/sys/signal.h:

#define SA_NOCLDSTOP 1  /* only value supported now for sa_flags */

#ifdef __CYGWIN__
# define SA_RESTART   0x10000000 /* Restart syscall on signal return.  */
# define SA_NODEFER   0x40000000 /* Don't automatically block the signal when
                                    its handler is being executed.  */
# define SA_RESETHAND 0x80000000 /* Reset to SIG_DFL on entry to handler.  */
#endif

AFAICT, these are invoked by gcc.  If they weren't we wouldn't be able to
actually build Cygwin which uses these.

I suggest gcc -v to figure out what include files you're using and what flags
are being passed.  You should see a -D__CYGWIN__ on a command line which should
cause these defines to be activated.

cgf

--
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple
Bug reporting:         http://cygwin.com/bugs.html
Documentation:         http://cygwin.com/docs.html
FAQ:                   http://cygwin.com/faq/