xwayland: use internal_config

Avoids the need to have a separate config.h, and removes C compiler
arguments.

xwayland/meson.build

@@ -62,6 +62,32 @@ foreach lib, desc : xwayland_optional
 	xwayland_libs += dep
 endforeach
 
+xwayland_feature_names = [
+	'listenfd',
+	'no_touch_pointer_emulation',
+	'force_xrandr_emulation',
+	'terminate_delay',
+]
+
+xwayland_features = {}
+if xwayland.found()
+	xwayland_path = xwayland.get_variable('xwayland')
+	foreach name : xwayland_feature_names
+		have = xwayland.get_variable('have_' + name, default_value: 'false') == 'true'
+		xwayland_features += { name: have }
+	endforeach
+else
+	xwayland_path = xwayland_prog.full_path()
+	foreach name : xwayland_feature_names
+		xwayland_features += { name: false }
+	endforeach
+endif
+
+internal_config.set_quoted('XWAYLAND_PATH', xwayland_path)
+foreach name, have : xwayland_features
+	internal_config.set10('HAVE_XWAYLAND_' + name.to_upper(), have)
+endforeach
+
 wlr_files += files(
 	'selection/dnd.c',
 	'selection/incoming.c',
@@ -77,7 +103,4 @@ wlr_deps += xwayland_libs
 features += { 'xwayland': true }
 
 have = cc.has_function('xcb_xfixes_set_client_disconnect_mode', dependencies: xwayland_libs)
-add_project_arguments(
-	'-DHAS_XCB_XFIXES_SET_CLIENT_DISCONNECT_MODE=@0@'.format(have.to_int()),
-	language: 'c',
-)
+internal_config.set10('HAS_XCB_XFIXES_SET_CLIENT_DISCONNECT_MODE', have)