$ cat main.c 
int main (int argc, char *argv[])
{
  return 0;
}
$ cat auditor.c 
#define _GNU_SOURCE
#include <link.h>
#include <dlfcn.h>

unsigned int
la_version (unsigned int v)
{
  return LAV_CURRENT;
}

void la_activity (uintptr_t* cookie, unsigned int flag)
{
  dlmopen(LM_ID_BASE, "/nonexistent.so", RTLD_NOW);
}
$ gcc -Wall main.c -o main
$ gcc -shared -fpic auditor.c -o libauditor.so -ldl
$ LD_AUDIT=./libauditor.so ./main 
Segmentation fault (core dumped)