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dlopen(0, RTLD_LAZY) doesn't work?
- From: Kent Watsen <kent at watsen dot net>
- To: cygwin at cygwin dot com
- Date: Wed, 06 Feb 2002 18:17:37 -0800
- Subject: dlopen(0, RTLD_LAZY) doesn't work?
Hi,
I've read the mailing list archives and searched google trying
to figure out how to get the following program to work. All
you have to do is save it to a file (foo.c), compile (gcc foo.c),
and run - I always get "dlsym() failed."
Note, I have tried many variations of extern and _declspec
as well as looking for "_foo" in addition to "foo" ("nm a.exe |
grep foo" returned "0040104c T _foo"...
Here is the code - help would be greatly appreciated - thanks!
#include <stdio.h>
#include <dlfcn.h>
#include <windows.h>
extern __declspec(dllexport) void foo(void)
{
printf("hello\n");
}
int main(int argc, char *argv[])
{
void* dl = NULL;
void* func = NULL;
dl = dlopen(0 , RTLD_LAZY);
if (dl == NULL) {
printf("dlopen() failed\n");
exit(0);
}
func = dlsym(dl, "foo");
if (func == NULL) {
printf("dlsym() failed\n");
exit(0);
}
printf("do something meaningful\n");
dlclose(dl);
return 0;
}
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