dlopen(0, RTLD_LAZY) doesn't work?

[Kent Watsen]

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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