* Arnd Bergmann <[email protected]> wrote:
> > So I think we should consider it a syntactic construct to avoid.
>
> Unused variables are relatively harmless compared to used-uninitialized
> variables that are always bugs (though they are provably impossible to
> detect correctly in some cases).
So the thing I was most worried about was that old GCC used to not warn about:
long __maybe_unused error;
...
if (error)
return error;
... but recent GCC does warn if it's certain that the use is uninitialized, so
the
scenario I outlined should not happen.
But it will supress the warning if the variable is uninitialized but GCC cannot
prove it for sure, so my point remains that it's a potentially dangerous
construct.
Thanks,
Ingo
