Ahorra tiempo para compilar c++

ghh.cpp

// ahorra tiempo para compilar c++
#include <cstdlib>
#include <iostream>
#include <string>
using namespace std;

int main(int argc, char const *argv[]) {
  string filename(argv[1]), result, callString;

  result = filename.substr(0 , filename.length() - 4);
  callString = "g++ -o "+ result + " " + filename;
  cout << callString << endl;
  system(callString.c_str());
  return 0;
}