gnu: xf86-video-openchrome: Patch to correct build failure.

* gnu/packages/xorg.scm (xf86-video-openchrome): Add patch for build failure
    with glibc-2.20. Fixes bug #18740.
* gnu/packages/patches/xf86-video-openchrome-includes.patch: New file.
* gnu-system.am (dist_patch_DATA): Register patch.

gnu-system.am

@@ -435,6 +435,7 @@ dist_patch_DATA =						\
   gnu/packages/patches/vpnc-script.patch			\
   gnu/packages/patches/w3m-fix-compile.patch			\
   gnu/packages/patches/xf86-input-synaptics-glibc-2.20.patch	\
+  gnu/packages/patches/xf86-video-openchrome-includes.patch	\
   gnu/packages/patches/xmodmap-asprintf.patch
 
 bootstrapdir = $(guilemoduledir)/gnu/packages/bootstrap

gnu/packages/patches/xf86-video-openchrome-includes.patch

@@ -0,0 +1,35 @@
+This follows the same rationale as xf86-input-synaptics-glibc-2.20.patch
+to allow building with glibc-2.20.
+diff -u -r xf86-video-openchrome-0.2.906.old/src/via_3d.h xf86-video-openchrome-0.2.906/src/via_3d.h
+--- xf86-video-openchrome-0.2.906.old/src/via_3d.h	2014-11-23 14:04:58.000000000 +0100
++++ xf86-video-openchrome-0.2.906/src/via_3d.h	2014-11-23 14:18:37.000000000 +0100
+@@ -24,6 +24,7 @@
+ #ifndef VIA_3D_H
+ #define VIA_3D_H
+ 
++#include "xorg-server.h"
+ #include "xf86.h"
+ #include "via_dmabuffer.h"
+ 
+diff -u -r xf86-video-openchrome-0.2.906.old/src/via_driver.h xf86-video-openchrome-0.2.906/src/via_driver.h
+--- xf86-video-openchrome-0.2.906.old/src/via_driver.h	2014-11-23 14:04:58.000000000 +0100
++++ xf86-video-openchrome-0.2.906/src/via_driver.h	2014-11-23 14:21:43.000000000 +0100
+@@ -35,6 +35,7 @@
+ #endif
+ 
+ #include "vgaHW.h"
++#include "xorg-server.h"
+ #include "xf86.h"
+ 
+ #if GET_ABI_MAJOR(ABI_VIDEODRV_VERSION) < 6 
+diff -u -r xf86-video-openchrome-0.2.906.old/src/via_timing.h xf86-video-openchrome-0.2.906/src/via_timing.h
+--- xf86-video-openchrome-0.2.906.old/src/via_timing.h	2014-11-23 14:04:58.000000000 +0100
++++ xf86-video-openchrome-0.2.906/src/via_timing.h	2014-11-23 14:20:50.000000000 +0100
+@@ -25,6 +25,7 @@
+ #ifndef _TIMING_H_
+ #define _TIMING_H_
+ 
++#include "xorg-server.h"
+ #include "xf86.h"
+ 
+ /* Aspect ratio not CVT standard */

gnu/packages/xorg.scm

@@ -2843,7 +2843,8 @@ kernel mode setting (KMS).")
                ".tar.bz2"))
         (sha256
           (base32
-            "0hgzn1r7ig94xbr9dvq0bp1nxqlfp2ki8823jca3f22a2kf8wmg7"))))
+            "0hgzn1r7ig94xbr9dvq0bp1nxqlfp2ki8823jca3f22a2kf8wmg7"))
+        (patches (list (search-patch "xf86-video-openchrome-includes.patch")))))
     (build-system gnu-build-system)
     (inputs `(("libx11" ,libx11)
               ("libxext" ,libxext)