test.c

#include <dlfcn.h>
#include <stdio.h>
#include "gst/gst.h"

typedef GstPluginDesc * (*get_desc)();

GstPluginDesc * do_func (get_desc func) {
    return func();
}

int main () {
    void *plugin = dlopen("./test-plugin.so", RTLD_NOW);
    get_desc func = dlsym(plugin, "gst_plugin_test_plugin_get_desc");
    
    GstPluginDesc *desc = do_func(func);

    printf("name: %s\n", desc->name);

    dlclose(plugin);

    return 0;
}