[PATCH][V2][xserver] configure.ac: add option for xshmfence

[Burton, Ross]

On 8 July 2014 22:14, Matt Turner <mattst88 at gmail.com> wrote:
> On Tue, Jul 8, 2014 at 2:07 PM, Ross Burton <ross.burton at intel.com> wrote:
>> xshmfence is usable outside of DRI3, and is currently autodetected which isn't
>> good for distributions where deterministic builds are aspired to.
>
> Forgot to reword. s/aspired to/desired/

Done.

>> +AC_ARG_ENABLE(xshmfence,      AS_HELP_STRING([--disable-xshmfence], [Disable xshmfence (default: auto)]), [WANT_XSHMFENCE="$enableval"], [WANT_XSHMFENCE="auto"])
>
> None of the other variables are prefixed with WANT_. I'd drop that.

There's already a variable called XSHMFENCE containing the pkgconfig
dependencies, and WANT_/HAVE_ make the logic obvious in my opinion.

Ross