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Message-ID:	<99B82AA9708ED0119B55006097125A00363ED0@ifk63.mach.uni-karlsruhe.de>
From:	Heribert Dahms <heribert_dahms AT icon-gmbh DOT de>
To:	"'Andrej Borsenkow'" <Andrej DOT Borsenkow AT mow DOT siemens DOT ru>,
	cygwin AT sourceware DOT cygnus DOT com
Subject:	RE: Accessing exported variables in DLL with dlsym().
Date:	Thu, 6 Jul 2000 23:10:03 +0200
X-Priority:	3
MIME-Version:	1.0
X-Mailer:	Internet Mail Service (5.0.1457.3)

Hi Andrej,

if you can rebuild the DLL from source, you may do what TCL/TK
did years ago due to this Win* deficiency: Add simple wrapper
functions which just return the pointer to one of your variables.

Bye, Heribert (heribert_dahms AT icon-gmbh DOT de)

> -----Original Message-----
> From:	Andrej Borsenkow [SMTP:Andrej DOT Borsenkow AT mow DOT siemens DOT ru]
> Sent:	Thursday, July 06, 2000 10:59
> To:	cygwin AT sourceware DOT cygnus DOT com
> Subject:	Accessing exported variables in DLL with dlsym().
> 
> I am trying to port a program that opens dynamic library with dlopen()
> and looks up symbol with dlsym(). This works for function reference
> but
> not for variable. The porgram is:
> 
> main.c:
> 
> #include <dlfcn.h>
> #include <stdio.h>
> 
> main() {
>     int (*foo)(void);
>     void *libfoo;
> 
>     libfoo = dlopen ("libfoo.dll", 0);
>     foo = dlsym (libfoo, "foo");
>     foo();
> }
> 
> foo.c:
> 
> #include <stdio.h>
> #include <dlfcn.h>
> 
> __declspec (dllexport) extern foo (void);
> 
> foo() {
>     char *bar;
>     void *libbar;
> 
>     libbar = dlopen ("libbar.dll", 0);
>     bar = dlsym (libbar, "bar");
>     puts (bar);
> }
> 
> 
> --
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