Mail Archives: cygwin/2003/04/07/11:31:47
I am sorry that I was not clear:
in limits.h, I changed the definition of IOV_MAX to 1024
in math.h, I *commented-out* the macro definition of log2
So, there's not much to test.....
I poked around in the cygwin-1.3.22-1-src.tar.bz2 tarball for the definition
and implementation of log, thinking that log2 could be implemented in code
(versus preprocessor macro), but got quickly lost in the __MATHCALL stuff.
I guess that I was tossing this out for comment by the knowledgeable folks
that implemented/ported the math library from Linux, and why log2 was
implemented this way versus the Linux code way. Like I said before, I got
quickly lost and certainly have no basis on which to form any
opinion/suggestion.
Thanks,
-David
---------------------
David Dawson
david DOT w DOT dawson AT lmco DOT com
703-367-3885
-----Original Message-----
From: Martin [mailto:mgainty AT hotmail DOT com]
Sent: Saturday, April 05, 2003 10:57 PM
To: cygwin AT cygwin DOT com
Subject: Re: ACE/TAO under Cygwin (was: ORB)
David-
can you show us the patch of code for #define so we can test the results
from the preprocessor output?
Regards,
Martin
----- Original Message -----
From: "Dawson, David W" <david DOT w DOT dawson AT lmco DOT com>
To: <cygwin AT cygwin DOT com>
Sent: Saturday, April 05, 2003 8:17 PM
Subject: ACE/TAO under Cygwin (was: ORB)
> I have been moderately successful in compiling ACE/TAO under Cygwin (Some
> problems with cone of the Services, but my CORBA programs interoperate
with
> our Solaris-based TAO services (and other CORBA clients/servants) fine.
>
> I encountered two problems with a couple of the definitions in the Cygwin
> /usr/include files:
>
> 1) In limits.h, IOV_MAX is defined as (__INT_MAX__-1) (a *very* large
> number).
> The other UNIX systems I could examime set it to a much smaller value
(like
> 1024).
> The comment says this is the "/* Maximum number of iovcnt in a writev */".
> Does Cygwin really support this many? Or is this just a convenient
setting?
>
> The reason for the question is that ACE (and TAO) define arrays for the
full
> number of supported IOV entries, and g++ chokes on an array of size
> __INT_MAX__-1
>
> (To set ACE/TAO to compile, I patched this value to 1024)
>
> 2) As a convenience (I suppose), math.h has a macro definition for log2.
> This is not the case in any other math.h I have been able to examine and
> causes a real problem in the development of a platform-independent "log2"
> routine.
>
> The problem is that the pre-processor replaces the string "log2" with it's
> defined value without regard to context. This means that while I can
write
> my own log() function (in my namespace, or course) I cannot write a log2
> function -- it won't compile.
>
> (To get ACE/TAO to compile, I patched math.h to remove this define.)
>
> The real questions in this post are:
> 1) Should there a better value for IOV_MAX in limits.h
> 2) Should the (as far as I can tell) non-standard define for log2 be
removed
> (or replaced with a real log2 function?)
> 3) Should I just go away and be quiet?
>
> Thanks,
> -David.
>
> ---------------------
> David Dawson
> david DOT w DOT dawson AT lmco DOT com
> 703-367-3885
>
>
> -----Original Message-----
> From: Luc Hermitte [mailto:hermitte AT free DOT fr]
> Sent: Saturday, April 05, 2003 8:06 AM
> To: cygwin AT cygwin DOT com
> Subject: Re: ORB
>
>
> Hello,
>
> * On Fri, Apr 04, 2003 at 05:07:50PM +0200, Vaillant Etienne
> <vaillant DOT etienne AT noos DOT fr> wrote:
> > I need a ORB for an application under Cygwin. I know Mico and Omniorb
> > but are there other ?
>
> TAO may be -- based on the C++ library ACE.
>
> I am not sure if it has been ported for Cygwin, but it is available on
many
> different systems -- unices, Windows, etc.
>
> HTH,
> --
> Luc Hermitte
>
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