[PATCH] compat: provide a new declaration of hg_ssize_t, in case we don't have it

[Yuya Nishihara]

On Mon, 11 Jul 2016 15:59:47 +0200, Maciej Fijalkowski wrote:
> On Mon, Jul 11, 2016 at 3:46 PM, Yuya Nishihara <yuya at tcha.org> wrote:
> > On Mon, 11 Jul 2016 15:26:32 +0200, Maciej Fijalkowski wrote:  
> >> The working workaround (it's a bit hard to test) seems to be:
> >>
> >> #if defined(_MSC_VER)
> >> #include <BaseTsd.h>
> >> typedef SSIZE_T hg_ssize_t;
> >> #else
> >> typedef ssize_t hg_ssize_t
> >> #endif  
> >
> > (CC +adrian, I'm not Windows expert.)
> >
> > It seems to work on Visual Studio 2008, which is the default compiler of
> > Python 2.7.
> >
> > I slightly prefer using ssize_t like other int/uint_ typedefs, i.e.
> >
> >   typedef SSIZE_T ssize_t;  
> 
> what happens if ssize_t is already defined? (there are some windows
> compilers that do it badly_

s/compilers/libraries/ as we check _MSC_VER?

Do they have incompatible typedef? That's unfortunate.