#include <stdio.h>
#ifdef _MSC_VER
#include <windows.h>
#define sleep(x) Sleep((x) * 1000)
#else
#include <unistd.h>
#endif

int main(int argc, char const *argv[])
{
  lldb_enable_attach();

  printf("Hello world.\n"); // Set break point at this line.
  if (argc == 1)
    return 1;

  // Create the synchronization token.
  FILE *f;
  if (f = fopen(argv[1], "wx")) {
    fputs("\n", f);
    fflush(f);
    fclose(f);
  } else
    return 1;

  // Waiting to be attached by the debugger, otherwise.
  while (1)
    sleep(1); // Waiting to be attached...
}