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

[Matt Turner]

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/

>
> Signed-off-by: Ross Burton <ross.burton at intel.com>
> ---
>  configure.ac |   22 +++++++++++++---------
>  1 file changed, 13 insertions(+), 9 deletions(-)
>
> diff --git a/configure.ac b/configure.ac
> index c214638..a1ca9ec 100644
> --- a/configure.ac
> +++ b/configure.ac
> @@ -648,6 +648,7 @@ AC_ARG_ENABLE(kdrive-kbd,     AS_HELP_STRING([--enable-kdrive-kbd], [Build kbd d
>  AC_ARG_ENABLE(kdrive-mouse,   AS_HELP_STRING([--enable-kdrive-mouse], [Build mouse driver for kdrive (default: auto)]), [KDRIVE_MOUSE=$enableval], [KDRIVE_MOUSE=auto])
>  AC_ARG_ENABLE(kdrive-evdev,   AS_HELP_STRING([--enable-kdrive-evdev], [Build evdev driver for kdrive (default: auto)]), [KDRIVE_EVDEV=$enableval], [KDRIVE_EVDEV=auto])
>  AC_ARG_ENABLE(libunwind,      AS_HELP_STRING([--enable-libunwind], [Use libunwind for backtracing (default: auto)]), [LIBUNWIND="$enableval"], [LIBUNWIND="auto"])
> +AC_ARG_ENABLE(xshmfence,      AS_HELP_STRING([--disable-xshmfence], [Disable xshmfence (default: auto)]), [WANT_XSHMFENCE="$enableval"], [WANT_XSHMFENCE="auto"])

None of the other variables are prefixed with WANT_. I'd drop that.

With those two changes,

Reviewed-by: Matt Turner <mattst88 at gmail.com>