[Pixman] [Patch] Fix pixman build with clang

[Manoj Gupta]

Thanks Emil,

I see that this is indeed fixed in master. There is another problem with
__builtin_shuffle though which clang doesn't support.

On Tue, Dec 12, 2017 at 7:26 AM, Emil Velikov <emil.l.velikov at gmail.com>
wrote:

> On 8 December 2017 at 23:32, Manoj Gupta <manojgupta at chromium.org> wrote:
> > Hi,
> >
> > I am encountering a build issue in pixman when compiling with with clang.
> >
> > pixman-mmx.c:100:20: error: constraint 'K' expects an integer constant
> > expression
> >         : "y" (__A), "K" (__N)
> >
> Seems like you guys are building some pretty old stuff ;-)
>
> The issue was resolved upstream back in 2015 [1] and there has been a
> release with said fix [2].
>
> -Emil
>
> [1] https://cgit.freedesktop.org/pixman/commit/?id=
> d24b415f3e2753a588759d028b811e1ce38fea6c
> [2] https://lists.x.org/archives/xorg-announce/2015-December/002666.html
>
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