Accessing exported variables in DLL with dlsym().

Thu Jul 6 14:13:00 GMT 2000

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@icon-gmbh.de)
> -----Original Message-----
> From:	Andrej Borsenkow [SMTP:Andrej.Borsenkow@mow.siemens.ru]
> Sent:	Thursday, July 06, 2000 10:59
> To:	cygwin@sourceware.cygnus.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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