Re: [Qemu-block] [Qemu-devel] [PATCH v5] build: Work around SIZE_MAX bug in OSX headers

[Programmingkid]

On Oct 11, 2016, at 2:12 PM, Eric Blake wrote:

> On 10/11/2016 01:03 PM, Programmingkid wrote:
> 
>>> +/* Mac OSX has a <stdint.h> bug that incorrectly defines SIZE_MAX with
>>> + * the wrong type. Our replacement isn't usable in preprocessor
>>> + * expressions, but it is sufficient for our needs. */
>>> +#if defined(HAVE_BROKEN_SIZE_MAX) && HAVE_BROKEN_SIZE_MAX
>>> +#undef SIZE_MAX
>>> +#define SIZE_MAX ((size_t)-1)
>>> +#endif
>>> +
> 
>> I have applied your patch to the most recent git commit 
>> (627eae7d729277c84f8e0ac07a8caab39c92c38d) on Mac  OS 10.6.8. QEMU built 
>> without any problems using gcc 4.9.
> 
> Did you also tweak the code to make sure there was an instance of
> printf("%zu", SIZE_MAX) (or similar)? It's not enough that it compiles
> without complaint (although that helps), but also that the
> compiler-warning-on-printf goes away (which we currently don't have any
> in the tree, because we've been writing '"%zu", (size_t)SIZE_MAX' to
> work around the broken headers).

I saw no warnings when I added your printf code. The output was 
18446744073709551615.