Re: [Libevent-users] Found a warning in libevent 2.0.21

[Nick Mathewson <nickm@xxxxxxxxxxxxx>]

On Tue, Sep 17, 2013 at 9:55 PM, Ralph Castain <rhc@xxxxxxxxxxxx> wrote:
> I found a really simple solution!
>
> #if defined(_EVENT_HAVE_ARC4RANDOM_BUF)
>         /* OSX 10.7 introducd arc4random_buf, so if you build your program
>          * there, you'll get surprised when older versions of OSX fail to run.
>          * To solve this, we can check whether the function pointer is set,
>          * and fall back otherwise.  (OSX does this using some linker
>          * trickery.)
>          */
>         {
>             void* tptr = (void*)arc4random_buf;
>             if (tptr != NULL) {
>                 return arc4random_buf(buf, n);
>             }
>         }
> #endif
>
> Silences the warning just fine.

Does it still work if you cast it to void (*tptr)() ? ISTR that
according to the C standard, function pointers can be cast to that,
but not to void*. (Not that that stops anybody, but it's nice to be
pedantic when we can.)
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