Question

In my C++ file, I have

#ifdef DEBUG 
    then blah
#else 
    blooh. 

I want to strip out all text that does not get compiled after preprocessing, so that if DEBUG is not defined, then all statement of the form:

#ifdef DBUG 
    /* some debug code */ 
#endif

gets stripped out of the source.

EDIT: Here is an example :

#include <iostream>
//#define DEBUG
int main(){
  #ifdef DEBUG
      cout << "In debug\n";
  #endif
     cout << "hello\n";
  return 0;
 }

And after running the script , the output should be

#include <iostream>
//#define DEBUG
int main(){
  cout << "hello\n";
 return 0;
}

Answer 1

Is just running the preprocessor not good enough? For example g++ -E?