Question

sorry for my bad english.

For example :

//
// File : Main.cpp
// 
#include <stdlib.h>
int main()
{
  printf(TEST_DEFINE);
  return (EXIT_SUCCESS);
}

Header :

//
// File : test_define.h
//
#ifndef TEST_DEFINE_H_INCLUDED
#define TEST_DEFINE_H_INCLUDED

#define TEST_DEFINE

#endif

I want include that header, by the compiler or other program. I not want include this header in CPP file.

How can i process ? I’m open to all proposal.

This situation is quite tricky, but necesary for my POC program.

Answer 1

GCC has an option -include file which causes the preprocessor to include the header as though the first line of your program said #include "file"

See the manual

e.g. given a fixed version of your main (which should #include <stdio.h>):

#include <stdlib.h>
#include <stdio.h>
int main()
{
  printf(TEST_DEFINE);
  return (EXIT_SUCCESS);
}

and your header:

//
// File : test_define.h
//
#ifndef TEST_DEFINE_H_INCLUDED
#define TEST_DEFINE_H_INCLUDED

#define TEST_DEFINE "hello\n"

#endif

Then I can use it like this:

$ g++ -include test_define.h main.cpp -o main
$ ./main
hello