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X-Authentication-Warning: hp2.xraylith.wisc.edu: khan owned process doing -bs
Date: Sat, 31 Mar 2001 11:09:40 -0600 (CST)
From: Mumit Khan <khan AT NanoTech DOT Wisc DOT EDU>
To: Tom Weichmann <tomcw AT localnet DOT com>
cc: Cygwin AT cygwin DOT com
Subject: Re: c++: unrecognized option `-rdynamic'
In-Reply-To: <3AC5BEA1.19543.1E8AB40@localhost>
Message-ID: <Pine.HPP.3.96.1010331110202.4632D-100000@hp2.xraylith.wisc.edu>
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Content-Type: TEXT/PLAIN; charset=US-ASCII

On Sat, 31 Mar 2001, Tom Weichmann wrote:

> I was just compiling the latest Octave (2.1.33) with the latest 
> version of Cygwin.  Octave has been compiling OOTB for a awhile 
> now, but I have ran into an error.  I am not sure if this a Cygwin 
> problem - something broken in this release, or if it is a new feature 
> in Octave which has never been supported in Cygwin.  Here is my 
> error:
[ ... ]
> c++: unrecognized option `-rdynamic'

It's a bug in the configuration, and since it's harmless, nobody had
bothered to remove it. However, it should be fixed in recent CVS. If
not, please send a note to Octave mailing list.

> What is -rdynamic?

It's used for resolving symbols in the executable itself when using
dynamic loading, and typically is a synonym for whatever the native 
linker expects (-export-dynamic on Linux for example). On some OS's
such as IRIX, it's ignored, and just works. On others such as Cygwin,
it's a bit more tricky, since you'll have to explicitly export all
the symbols that you want to load dynamically.

Regards,
Mumit



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