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#include <dlfcn.h>
#include <pthread.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <gnu/lib-names.h>
static void *
tf (void *arg)
{
void *h = dlopen (LIBM_SO, RTLD_LAZY);
if (h == NULL)
{
printf ("dlopen failed: %s\n", dlerror ());
exit (1);
}
if (dlsym (h, "sin") == NULL)
{
printf ("dlsym failed: %s\n", dlerror ());
exit (1);
}
if (dlclose (h) != 0)
{
printf ("dlclose failed: %s\n", dlerror ());
exit (1);
}
return NULL;
}
int
main (void)
{
#define N 10
pthread_t th[N];
for (int i = 0; i < N; ++i)
{
int e = pthread_create (&th[i], NULL, tf, NULL);
if (e != 0)
{
printf ("pthread_create failed with %d (%s)\n", e, strerror (e));
return 1;
}
}
for (int i = 0; i < N; ++i)
{
void *res;
int e = pthread_join (th[i], &res);
if (e != 0 || res != NULL)
{
puts ("thread failed");
return 1;
}
}
return 0;
}
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