xorg_list: define the xorg_list* symbols

...when building against pre 1.12 x.
The build will fail as earlier versions of X were missing the xorg_
prefix of the symbols - struct and util functions.

Reported-by: Pali Rohár <pali.rohar@gmail.com>
Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Signed-off-by: Ben Skeggs <bskeggs@redhat.com>

configure.ac

@@ -127,6 +127,19 @@ AC_SUBST([DRIVER_NAME])
 XORG_MANPAGE_SECTIONS
 XORG_RELEASE_VERSION
 
+AC_CHECK_HEADERS([list.h],
+                 [have_list_h="yes"], [have_list_h="no"],
+                 [#include <X11/Xdefs.h>
+                  #include "xorg-server.h"])
+
+if test "x$have_list_h" = xyes; then
+    AC_CHECK_DECL(xorg_list_init,
+                  [AC_DEFINE(HAVE_XORG_LIST, 1, [Have xorg_list API])], [],
+                  [#include <X11/Xdefs.h>
+                   #include "xorg-server.h"
+                   #include "list.h"])
+fi
+
 AC_MSG_CHECKING([whether to include GLAMOR support])
 
 AC_COMPILE_IFELSE(AC_LANG_PROGRAM(

src/drmmode_display.c

@@ -126,6 +126,14 @@ drmmode_swap(ScrnInfoPtr scrn, uint32_t next, uint32_t *prev)
 	drmmode->fb_id = next;
 }
 
+#if !HAVE_XORG_LIST
+#define xorg_list                       list
+#define xorg_list_for_each_entry        list_for_each_entry
+#define xorg_list_for_each_entry_safe   list_for_each_entry_safe
+#define xorg_list_append                list_append
+#define xorg_list_del                   list_del
+#endif
+
 struct drmmode_event {
 	struct xorg_list head;
 	drmmode_ptr drmmode;

src/nv_driver.c

@@ -37,6 +37,11 @@
 #include "nouveau_present.h"
 #include "nouveau_sync.h"
 
+#if !HAVE_XORG_LIST
+#define xorg_list_is_empty              list_is_empty
+#define xorg_list_for_each_entry        list_for_each_entry
+#endif
+
 /*
  * Forward definitions for the functions that make up the driver.
  */