[PATCH 06/25] Add struct scratch_buffer and its internal helper functions

[Florian Weimer]

On 03/23/2015 07:46 PM, Joseph Myers wrote:
> On Mon, 23 Mar 2015, Florian Weimer wrote:
> 
>> On 03/23/2015 07:41 PM, Joseph Myers wrote:
>>
>>>> Since C allows platforms where pointers and/or floating-point values have
>>>> alignments stricter than intmax_t, I suggest using 'max (__alignof__
>>>> (intmax_t), __alignof__ (max_align_t))' along with a comment explaining why
>>>> you don't trust max_align_t here.
>>>
>>> max_align_t was added to stddef.h in GCC 4.7, so we can't rely on it in 
>>> glibc without appropriate conditionals.
>>
>> We compile glibc in -std=gnu99 mode, and max_align_t appears available.
>>  Suggestions?
> 
> It's specifically when compiling with GCC 4.6 (the oldest supported 
> version) that it won't be available.

Oh, I misread what you wrote.  What I was saying is that we can't get it
easily with GCC 4.9.2, either.

-- 
Florian Weimer / Red Hat Product Security