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Re: -Wcast-qual and casting away


Richard Guenther <richard.guenther@gmail.com> writes:

> For
>
> extern const char **f1();
> void f(char *p)
> {
>   *(char **)f1() = p;
> }
>
> it warns with
>
> t.C: In function âvoid f(char*)â:
> t.C:4: warning: cast from type âconst char**â to type âchar**â casts
> away constness
>
> which makes sense.

This is actually a safe operation, you can even store safely into
**(char **)f1() afterwards.

Andreas.

-- 
Andreas Schwab, schwab@linux-m68k.org
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