CMake/Tests/SubDir/Executable/test.cxx

#include <stdio.h>
#include  <stdlib.h>
#ifdef _WIN32
#include <io.h>
#else
#include <unistd.h>
#endif

// return true if the file exists
int FileExists(const char* filename)
{
#ifdef _MSC_VER
# define access _access
#endif
#ifndef F_OK
#define F_OK 0
#endif
  if ( access(filename, F_OK) != 0 )
    {
    return false;
    }
  else
    {
    return true;
    }
}


int main(int ac, char** av)
{
  if(ac <= 1)
    {
    printf("Usage: %s <file>\n", av[0]);
    return 1;
    }
  if(!FileExists(av[1]))
    {
    printf("Missing file %s\n", av[1]);
    return 1;
    }
  if(FileExists(av[2]))
    {
    printf("File %s should be in subdirectory\n", av[2]);
    return 1;
    }
  printf("%s is not there! Good.", av[2]);
  printf("%s is there! Good.", av[1]);
  return 0;
}