#include <stdio.h>
#include <dlfcn.h>
#include <stdlib.h>

void main()
{
  void *handle;

  handle = dlopen("./temp.so", RTLD_LAZY | RTLD_GLOBAL);

  if ( !handle ) {
	  fprintf(stderr, "Error in opening .so file\n");
	  exit(1);
  }

  dlclose(handle);
}

Constructor / Destructor code:
-------------------------------

#include <stdio.h>
#include <dlfcn.h>
#include <stdlib.h>

void __attribute__ ((constructor)) my_init(void)
{

  fprintf(stderr, "start of my_init constructor called\n");
  
 
  fprintf(stderr, "end of my_init constructor called:\n");
}

void __attribute__ ((destructor)) my_fini(void)
{
  fprintf(stderr, "my_fini destructor called\n");
}