text: #include <iostream>
  #include <unistd.h>   // Ensure POSIX works
  // #include <filesystem> // Ensure C++17 works
  
  int main() {
    std::cout << "hello, world!" << std::endl;
    std::cout << "The process ID is " << getpid() << "." << std::endl;
    // std::cout << std::filesystem::path("path/foo/bar").c_str() << std::endl;
  }
  