On Fri, Dec 12, 2014 at 1:23 PM, Jan Vesely <jan.ves...@rutgers.edu> wrote:
> On Fri, 2014-12-12 at 12:58 -0800, Matt Turner wrote:
>> I'm curious what the motivation for removing variably-sized arrays is,
>> but if I accept that that's a good thing to do then the first patch
>> makes sense, but I don't understand this one.
>>
>> How is a variably-size array different from using alloca()?
>
> variable size arrays are a c99 feature not supported by msvc (that's why
> there is a warning). I don't know which parts actually do need to build
> using msvc, but it seemed like a good idea to reduce warning output (and
> improve consistency with code that needs to build using msvc).
>
> In the first patch I used alloca+free, because it looked nicer than
> doing size arithmetic. The other cases allocate byte arrays, and the
> only difference is that alloca (_alloca) is supported by msvc.

Okay, then this patch doesn't do anything useful, since these tests
shouldn't be built with MSVC. dma_bufs are a Linux thing.
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