#pragma GCC diagnostic push
#pragma GCC diagnostic ignored "-Wimplicit-function-declaration"

#include <pthread.h>
#include <stdio.h>
#include <unistd.h>

void *thread_func(void *data) {
  sleep(1);
  printf("Hello from the new thread!\n");
  return NULL;
}

int main() {
  pthread_t thread;
  int result = pthread_create(&thread, NULL, thread_func, NULL);
  if (result != 0) {
    printf("Error creating thread: %d\n", result);
    return 1;
  }
  while (1) {
    result = pthread_tryjoin_np(thread, NULL);
    if (result == 0) {
      // thread has finished
      break;
    }
    printf("Waiting for thread to finish...\n");
    sleep(1);
  }
  printf("Hello from the main thread!\n");
  return 0;
}

#pragma GCC diagnostic pop