Remove #pragma once warnings

Question

I am using #pragma once in my .cpps and .hpps and because of that I get a warning for each file that uses it. I have not found any opt

Answer 1

Indeed the #ifndef guard can always be used, but just to remove the warning while compiling the source which uses #pragma once I would recommend to use the -woption while compiling.

e.g. gcc -w -o <output file> <input file(s)>

Answer 2

The common approach is to place the guard in the .h file only:

#ifndef MYFILE_H
#define MYFILE_H
// all your myfile.hpp here
#endif

or

#pragma once
// all your myfile.hpp here

The rest of files (other .cpp) should do nothing regarding the guards. You should not get warnings by doing this.