[PATCH] MGA DDX: make it possible to find EXA support

[Matthew Rezny]

Newer versions of the xserver stricter requirements on header order which 
caused the configure tests for EXA support to erroneously fail. Since XAA was 
already removed from an earlier version of xserver, the configure failure meant 
no acceleration was possible. Patch configure tests similar to r128.

--- configure.ac.orig   2015-02-19 21:38:57 UTC
+++ configure.ac
@@ -155,8 +155,9 @@ if test "x$EXA" = xyes; then
 
     SAVE_CPPFLAGS="$CPPFLAGS"
     CPPFLAGS="$CPPFLAGS $XORG_CFLAGS"
-    AC_CHECK_HEADER(exa.h,
-                   [have_exa_h="yes"], [have_exa_h="no"])
+    AC_CHECK_HEADERS(exa.h,
+                   [have_exa_h="yes"], [have_exa_h="no"],
+                   [#include "xorg-server.h"])
     CPPFLAGS="$SAVE_CPPFLAGS"
 else
     AC_MSG_RESULT(no)
@@ -167,6 +168,7 @@ CPPFLAGS="$CPPFLAGS $XORG_CFLAGS"
 if test "x$have_exa_h" = xyes; then
     AC_MSG_CHECKING([whether EXA version is at least 2.0.0])
     AC_PREPROC_IFELSE([AC_LANG_PROGRAM([[
+#include "xorg-server.h"
 #include "exa.h"
 #if EXA_VERSION_MAJOR < 2
 #error OLD EXA!