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Date:	Mon, 26 Sep 2005 21:38:45 +1200
From:	Danny Smith <dannysmith AT clear DOT net DOT nz>
Subject:	Re; Visibility of compiler symbols between executables and DLLs
To:	nick DOT glencross AT gmail DOT com
Cc:	Cygwin <cygwin AT cygwin DOT com>
Reply-to:	Danny Smith <dannysmith AT users DOT sourceforge DOT net>
Message-id:	<000f01c5c27e$181319e0$e66d65da@DANNY>
MIME-version:	1.0

Nick Glencross wrote:

> On many platforms compilation symbols in an executable are not made
> visible to its Shared Library/DLLs by default, but this can often be
> overridden with a compiler flag to change the policy. My question in a
> nutshell then is whether cygwin has the ability to have a DLL access a
> global variable within the executable that loads it? As an obvious
> follow on, if yes, then how do you go about doing it?
>

http://sources.redhat.com/cgi-bin/cvsweb.cgi/src/winsup/mingw/samples/dlltest/?c
vsroot=src

has an old example (ca 1998). You can find more recent examples, using
'gcc -shared' rather than dlltool, in
cygwin archives.
Danny



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