[webkit-dev] Can we disable "control reaches end of non-void function" warning on Qt?

[Ryosuke Niwa]

On Thu, Sep 12, 2013 at 8:46 PM, Filip Pizlo <fpizlo at apple.com> wrote:

>
> On Sep 12, 2013, at 7:54 PM, Ryosuke Niwa <rniwa at webkit.org> wrote:
>
> Hm... it appears that I was wrong about this.  It appears that this is the
> intended feature in gcc:
> http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28236
>
>
> Yuck!  Madness!
>
>
> Regardless, I don't think we should have this warning enabled. We're
> generating some unused code everywhere :(
>
>
> :-(
>
> Yes, we could say that the warning is disabled in gcc and enabled in
> clang.  I'm not sure that's fair, though.  We do all sorts of strange
> things to silence clang sometimes; it's only fair that once in a while we
> do things to silence gcc.  So unless we say that WebKit should only be
> developed on clang, we should probably agree to sometimes silence gcc's
> peculiarities.
>

I think we should move away from doing bizarre things to silence warnings
in gcc & clang.  In this particular case, we're probably generating
significantly more code just to silence it.

I'm fine with adding a new macro like UNREACHED_RETURN() but that would
mean that any port using gcc will end up having dead code, potentially
bloating the binary size a lot.

- R. Niwa
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