how to make gcc warn about arithmetic signed overflow

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On Sat, Sep 21, 2013 at 09:55:07PM +0200, Jędrzej Dudkiewicz wrote:
> >> No, that's not true. You can't change the value of a const object in a
> >> valid program.
> >
> > I think I can but it may cause an undefined behavior:
> 
> Note, that Jonathan wrote "in a valid program". Your program is not
> valid, as it contains undefined behaviour - you change const int via
> pointer to non-const int.

Is p pointer in my code a pointer to non-const int? It points to bc
int memory address and bc is constant. Does C language bind constness
to an indentifier instead of memory address?

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