Code::Blocks Forums
User forums => General (but related to Code::Blocks) => Topic started by: geronet on July 31, 2006, 05:49:31 pm
-
Hello, easy description of the problem:
If i try to use this (watch the part with "You can achieve this with the help of..."):
http://www.eng.cam.ac.uk/help/tpl/languages/C/teaching_C/node29.html
it doesn't work. I wonder why?
Using the gcc with XP.
Thanks in advance, Stefan
-
This works fine for me. It has worked fine for more years than I care to remember.
In my area, it is SOP to do something like:
(in the header file)
#ifdef _MYFILE_C_
#define EXTERN
#else
#define EXTERN extern
#endif
EXTERN int my_var;
(in the main code module)
#define _MYFILE_C_
#include "myfile.h>
This ensures the globals are defined only in "myfile.c",
but declared extern everywhere else.
Cheers,
Ron
-
Just the trick I was looking for, thank you.