[PATCH 1-12/41] joystick .. xgixp: configure.ac: use backticks rather than $() for cmd subs

[Gaetan Nadon]

Hi,

There are 41 driver modules with the line:

        sdkdir=$(pkg-config --variable=sdkdir xorg-server)


Following up on review
http://lists.x.org/archives/xorg-devel/2009-November/003711.html


        From Dan Nicholson:
        This should be
        
        sdkdir=`$PKG_CONFIG --variable=sdkdir xorg-server`
        
        1. The user may need to use a specific pkg-config or pass custom
        arguments to it. Think multiarch or cross-compiling scenarios.
        
        2. Backticks (``) are supported by all shells while $() command
        substitution is for strictly POSIX conforming shells. We don't
        need to
        limit ourselves to that subset.


There are 12 drivers who are effectively using this line:


        joystick, synaptics, glint, intel, mach64, mga, r128, savage,
        sis, tdfx, xgi, xgixp


I intend to apply this patch to all 12 of them. Other patches for the
remainder modules will follow.

The reference patch is from input-synaptics
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