From c0978ce798c1d85a485f74a891d18516ef3409f8 Mon Sep 17 00:00:00 2001
From: Paul Olav Tvete <paul.tvete@qt.io>
Date: Tue, 5 Mar 2024 12:31:12 +0100
Subject: Make sure XDG_RUNTIME_DIR is created

Before Qt 6.5, QGuiApplication would create XDG_RUNTIME_DIR as a
side effect of looking up QStandardPaths::writableLocation during
platform theme initialization. Since QtWaylandCompositor cannot function
without a writable XDG_RUNTIME_DIR, do that lookup when the compositor
is constructed.

Fixes: QTBUG-122965
Pick-to: 6.6 6.5
Change-Id: Ia2365f08ba75be276ca7cc5520875c08cc82b465
Reviewed-by: Eskil Abrahamsen Blomfeldt <eskil.abrahamsen-blomfeldt@qt.io>
(cherry picked from commit 7a8f3b66158c9c5cd388ff5adb533259b87ab843)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>
---
 src/compositor/compositor_api/qwaylandcompositor.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/compositor/compositor_api/qwaylandcompositor.cpp b/src/compositor/compositor_api/qwaylandcompositor.cpp
index ea7c4a345..e6f5955b8 100644
--- a/src/compositor/compositor_api/qwaylandcompositor.cpp
+++ b/src/compositor/compositor_api/qwaylandcompositor.cpp
@@ -41,6 +41,7 @@
 #include <QtCore/QCoreApplication>
 #include <QtCore/QStringList>
 #include <QtCore/QSocketNotifier>
+#include <QStandardPaths>
 
 #include <QtGui/QDesktopServices>
 #include <QtGui/QScreen>
@@ -135,6 +136,9 @@ public:
 
 QWaylandCompositorPrivate::QWaylandCompositorPrivate(QWaylandCompositor *compositor)
 {
+    // Create XDG_RUNTIME_DIR, if it does not already exist
+    QStandardPaths::writableLocation(QStandardPaths::RuntimeLocation);
+
     if (QGuiApplication::platformNativeInterface())
         display = static_cast<wl_display*>(QGuiApplication::platformNativeInterface()->nativeResourceForIntegration("server_wl_display"));
 
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