Allow builds with glibc 2.20.
Based on a patch by Peter Hutterer <peter.hutterer@who-t.net>.
See <https://raw.githubusercontent.com/openembedded/oe-core/master/meta/recipes-graphics/xorg-driver/xf86-input-synaptics/always_include_xorg_server.h.patch>.

--- xf86-video-geode-2.11.16/src/lx_memory.c.~1~	2014-07-16 16:59:37.000000000 -0400
+++ xf86-video-geode-2.11.16/src/lx_memory.c	2014-12-19 00:38:11.753388268 -0500
@@ -23,6 +23,8 @@
  * software without specific prior written permission.
  */
 
+#include <xorg-server.h>
+
 #include "xf86.h"
 #include "geode.h"
 #include "cim/cim_regs.h"
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<div class='path'>path: <a href='/guix/log/?id=822edbf08b754dfd1c9f25500c4e9490b99276f4'>root</a>/<a href='/guix/log/gnu?id=822edbf08b754dfd1c9f25500c4e9490b99276f4'>gnu</a>/<a href='/guix/log/gnu/services?id=822edbf08b754dfd1c9f25500c4e9490b99276f4'>services</a>/<a href='/guix/log/gnu/services/audio.scm?id=822edbf08b754dfd1c9f25500c4e9490b99276f4'>audio.scm</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/services/audio.scm?id=822edbf08b754dfd1c9f25500c4e9490b99276f4&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-12-06 23:18:08 +0100'>2020-12-06</span></td><td><a href='/guix/commit/gnu/services/audio.scm?id=ce3b5e5a8d8566162201cb778c4586f94a626dfa'>services: mpd: Make /var/run/mpd/USER user-owned.</a><span class='msg-avail'>...<span class='msg-tooltip'>Fixes &lt;https://bugs.gnu.org/44820&gt;.
Reported by Simon &lt;lists@netpanic.org&gt;.

This is a followup to bb124f6e9c0af0a23736f233c2ea2c9c9b4a40a6.

* gnu/services/audio.scm (mpd-service-activation): Chown the parent of
DIRECTORY as well.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-11-06 23:10:18 +0100'>2020-11-06</span></td><td><a href='/guix/commit/gnu/services/audio.scm?id=bb124f6e9c0af0a23736f233c2ea2c9c9b4a40a6'>services: mpd: Fix daemon startup.</a><span class='msg-avail'>...<span class='msg-tooltip'>Until now it would wait for a PID file that'd never come.

* gnu/services/audio.scm (mpd-shepherd-service): Add 'requirement'.
Remove #:pid-file from 'start'.
(mpd-service-activation): Create the ".mpd" directory since that's what
the daemon expects.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-11-06 22:59:19 +0100'>2020-11-06</span></td><td><a href='/guix/commit/gnu/services/audio.scm?id=7209d7cbc37c108ca1148561a681258bb2222ab1'>services: mpd: Always create the "mpd" user account.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/audio.scm (%mpd-accounts): New variable.
(mpd-service-type)[extensions]: Add ACCOUNT-SERVICE-TYPE extension.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2020-11-06 08:54:27 -0500'>2020-11-06</span></td><td><a href='/guix/commit/gnu/services/audio.scm?id=0c5d0c57d370b34f3ba677838deaa8baf7bca58a'>services: mpd: Do not eagerly look for a user.</a><span class='msg-avail'>...<span class='msg-tooltip'>Running 'guix system search mpd' would throw a backtrace because the
mpd-shepherd-service service start Gexp contained an unquoted call to
'getpwnam', which would look for a missing 'mpd' user and fail.

* gnu/services/audio.scm (mpd-shepherd-service): gexp-unquote only the
relevant variable rather than the whole expression.
</span></span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2020-05-13 23:35:57 +0200'>2020-05-13</span></td><td><a href='/guix/commit/gnu/services/audio.scm?id=ad263045b9bf016d6f4fbb1f7fde0f51d3194944'>services: Add missing import.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/services/audio.scm: Import (ice-9 format).
</span></span></td><td>Ludovic Courtès</td></tr>