cogl: Fix build without X11

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/2354>

cogl/cogl/cogl-driver.h

@@ -36,6 +36,7 @@
 #include "cogl-framebuffer-private.h"
 #include "cogl-attribute-private.h"
 #include "cogl-sampler-cache-private.h"
+#include "cogl-texture-private.h"
 
 typedef struct _CoglDriverVtable CoglDriverVtable;
 

cogl/cogl/cogl-fence.c

@@ -29,9 +29,9 @@
 
 #include "cogl-config.h"
 
+#include "cogl-context-private.h"
 #include "cogl-fence.h"
 #include "cogl-fence-private.h"
-#include "cogl-context-private.h"
 #include "winsys/cogl-winsys-private.h"
 
 #define FENCE_CHECK_TIMEOUT 5000 /* microseconds */

cogl/test-fixtures/test-utils.c

@@ -99,7 +99,7 @@ create_onscreen (CoglContext *cogl_context,
       break;
 #endif
     case COGL_WINSYS_ID_EGL_XLIB:
-#ifdef COGL_HAS_EGL_SUPPORT
+#ifdef COGL_HAS_EGL_PLATFORM_XLIB_SUPPORT
       return COGL_ONSCREEN (cogl_onscreen_xlib_new (cogl_context,
                                                     width, height));
 #else

meson.build

@@ -135,6 +135,10 @@ if have_xwayland and not have_wayland
   error('XWayland support requires Wayland support enabled')
 endif
 
+if not have_wayland and not have_x11
+  error('A Wayland/X11 backend must be enabled')
+endif
+
 if have_x11_client
   x11_dep = dependency('x11')
   xcomposite_dep = dependency('xcomposite', version: xcomposite_req)