Thread: Access restriction for external variable..

Declare i to be a local variable in func1() instead of a global variable.

The point is that an external variable IS external, so it is available everywhere.

You can put the extern declaration INSIDE a function, e.g.

Code:

func1()
(
  extern int i;
  ...
}

This of course isn't going to prevent some other function from doing exactly the same, so it's only going to make sure that you KNOW which functions have direct access to the variable.

--
Mats

Sorry for the double post. On top of what I wrote above, there could be any number of OTHER solutions that you could use to restrict the access so that you can only get hold of some "global" data in the right way. You could for example have a local static variable that you return the address of in a particular function - of course, there's still nothing preventing this function from being called from multiple places.

--
Mats