fix: comprehensive boot warnings and exceptions — fixable silenced, unfixable diagnosed

Build system (5 gaps hardened):
- COOKBOOK_OFFLINE defaults to true (fork-mode)
- normalize_patch handles diff -ruN format
- New 'repo validate-patches' command (25/25 relibc patches)
- 14 patched Qt/Wayland/display recipes added to protected list
- relibc archive regenerated with current patch chain

Boot fixes (fixable):
- Full ISO EFI partition: 16 MiB → 1 MiB (matches mini, BIOS hardcoded 2 MiB offset)
- D-Bus system bus: absolute /usr/bin/dbus-daemon path (was skipped)
- redbear-sessiond: absolute /usr/bin/redbear-sessiond path (was skipped)
- daemon framework: silenced spurious INIT_NOTIFY warnings for oneshot_async services (P0-daemon-silence-init-notify.patch)
- udev-shim: demoted INIT_NOTIFY warning to INFO (expected for oneshot_async)
- relibc: comprehensive named semaphores (sem_open/close/unlink) replacing upstream todo!() stubs
- greeterd: Wayland socket timeout 15s → 30s (compositor DRM wait)
- greeter-ui: built and linked (header guard unification, sem_compat stubs removed)
- mc: un-ignored in both configs, fixed glib/libiconv/pcre2 transitive deps
- greeter config: removed stale keymapd dependency from display/greeter services
- prefix toolchain: relibc headers synced, _RELIBC_STDLIB_H guard unified

Unfixable (diagnosed, upstream):
- i2c-hidd: abort on no-I2C-hardware (QEMU) — process::exit → relibc abort
- kded6/greeter-ui: page fault 0x8 — Qt library null deref
- Thread panics fd != -1 — Rust std library on Redox
- DHCP timeout / eth0 MAC — QEMU user-mode networking
- hwrngd/thermald — no hardware RNG/thermal in VM
- live preload allocation — BIOS memory fragmentation, continues on demand

local/recipes/qt/qtwayland/source/examples/wayland/minimal-qml/CMakeLists.txt

@@ -0,0 +1,48 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+cmake_minimum_required(VERSION 3.16)
+project(minimal-qml LANGUAGES CXX)
+
+set(CMAKE_AUTOMOC ON)
+
+if(NOT DEFINED INSTALL_EXAMPLESDIR)
+    set(INSTALL_EXAMPLESDIR "examples")
+endif()
+
+set(INSTALL_EXAMPLEDIR "${INSTALL_EXAMPLESDIR}/wayland/minimal-qml")
+
+find_package(Qt6 REQUIRED COMPONENTS Core Gui Qml)
+
+qt_add_executable(minimal-qml
+    main.cpp
+)
+
+set_target_properties(minimal-qml PROPERTIES
+    WIN32_EXECUTABLE TRUE
+    MACOSX_BUNDLE TRUE
+)
+
+target_link_libraries(minimal-qml PUBLIC
+    Qt::Core
+    Qt::Gui
+    Qt::Qml
+)
+
+# Resources:
+set(minimal-qml_resource_files
+    "main.qml"
+)
+
+qt6_add_resources(minimal-qml "minimal-qml"
+    PREFIX
+        "/"
+    FILES
+        ${minimal-qml_resource_files}
+)
+
+install(TARGETS minimal-qml
+    RUNTIME DESTINATION "${INSTALL_EXAMPLEDIR}"
+    BUNDLE DESTINATION "${INSTALL_EXAMPLEDIR}"
+    LIBRARY DESTINATION "${INSTALL_EXAMPLEDIR}"
+)

local/recipes/qt/qtwayland/source/examples/wayland/minimal-qml/doc/src/minimal-qml.qdoc

@@ -0,0 +1,93 @@
+// Copyright (C) 2021 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GFDL-1.3-no-invariants-only
+
+/*!
+ * \title Minimal QML
+ * \example minimal-qml
+ * \examplecategory {Embedded}
+ * \brief Minimal QML is a simple example that demonstrates how to write a Wayland compositor in QML.
+ * \ingroup qtwaylandcompositor-examples
+ *
+ * Minimal QML is a desktop-style Wayland compositor example implementing a
+ * complete Qt Wayland Compositor with as little code as possible. The compositor is implemented
+ * with Qt Quick and QML.
+ *
+ * \image minimal-qml.png
+ *
+ * \section1 The WaylandCompositor Object
+ *
+ * The top-level item of the compositor is a \l WaylandCompositor. This represents the Wayland
+ * server itself and manages the connections to clients as they come in.
+ *
+ * \snippet minimal-qml/main.qml compositor
+ *
+ * By default, the server supports the core Wayland protocol for communicating with clients.
+ * Usually, though, you will also want to support one or more extensions to the protocol. This
+ * gives the client more tools to influence its role in the windowing system.
+ *
+ * Qt supports several standard and common extensions. In addition, it is easy to create and support
+ * custom extensions, as long as support can be added in both the client and server code.
+ *
+ * \section1 Shell Extensions
+ *
+ * Typically, a compositor will support at least one
+ * \l{Shell Extensions - Qt Wayland Compositor}{shell extension}. Extensions are added to
+ * the compositor by instantiating them as direct children of the \l WaylandCompositor object. They
+ * will automatically be added to its \c extensions property and broadcast to clients when they
+ * connect.
+ *
+ * \snippet minimal-qml/main.qml shells
+ *
+ * The \e{Minimal QML} example supports three different shells: \l{WlShell}, \l{XdgShell} and
+ * \l{IviApplication}.
+ *
+ * A client can connect to either of these and it will be used as a channel for communicating
+ * about certain things between the client and compositor, such as creating new windows,
+ * negotiating size, and so on.
+ *
+ * When a client creates a new surface, its active extension will receive a signal of this. The
+ * signal contains a \l ShellSurface argument. Depending on which extension received the signal,
+ * this argument will be of a subclass of \l{ShellSurface}: \l{WlShellSurface}, \l{XdgSurface}
+ * or \l{IviSurface} respectively.
+ *
+ * The \l ShellSurface can be used to access features of the shell extension for the specific
+ * surface. In the \e{Minimal QML} example, we simply want to add the client to our scene. To
+ * record existence of the new window, we add it to a simple \l ListModel for safe-keeping.
+ *
+ * \snippet minimal-qml/main.qml model
+ *
+ * \section1 Creating the Scene
+ *
+ * Most of the necessary compositor code is already ready. The final step is to make sure
+ * applications are actually visible on the screen.
+ *
+ * For all compositors, we have to define at least one output. This is done by instantiating
+ * a \l WaylandOutput object as the direct child of the \l WaylandCompositor. If there is only
+ * a single output, this will represent the primary screen on the system. (You may also create
+ * multiple \l WaylandOutput objects to address multiple screens if they are available. See
+ * the \l{Multi Screen}{Multi Screen example} for more details
+ * about this.)
+ *
+ * \snippet minimal-qml/main.qml output
+ *
+ * Inside the \l{WaylandOutput}, we create a \l Window that serves as the container for
+ * our scene. In the example, we give this a size. The size used if the compositor is running as
+ * an application inside another windowing system which supports custom-sized windows. In a
+ * typical use case on an embedded device, where the compositor is the only display server running,
+ * it will probably be running on a full-screen platform plugin (such as \c{eglfs}) and the size
+ * set here will not matter.
+ *
+ * The final step is to create items for each of the \l ShellSurface objects that have been created.
+ * For this, we can use the \l ShellSurfaceItem class.
+ *
+ * \snippet minimal-qml/main.qml shell surface item
+ *
+ * We create a \l ShellSurfaceItem for each of the shell surfaces in our model, and assign them
+ * to the \c shellSurface property. In addition, we make sure the model is updated when the shell
+ * surface is destroyed. This can happen when a client manually closes a window, and if it exits
+ * or crashes.
+ *
+ * And this is all the code needed to create a functional Wayland compositor using Qt Quick and
+ * QML. For another example of a compositor written in QML but which has a few more features, take
+ * a look at the \l{Fancy Compositor}{Fancy Compositor example}.
+ */

local/recipes/qt/qtwayland/source/examples/wayland/minimal-qml/main.cpp

@@ -0,0 +1,21 @@
+// Copyright (C) 2017 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+#include <QtCore/QUrl>
+#include <QtCore/QDebug>
+
+#include <QtGui/QGuiApplication>
+
+#include <QtQml/QQmlApplicationEngine>
+
+int main(int argc, char *argv[])
+{
+    // ShareOpenGLContexts is needed for using the threaded renderer
+    // on Nvidia EGLStreams
+    QCoreApplication::setAttribute(Qt::AA_ShareOpenGLContexts, true);
+    QGuiApplication app(argc, argv);
+
+    QQmlApplicationEngine appEngine(QUrl("qrc:///main.qml"));
+
+    return app.exec();
+}

local/recipes/qt/qtwayland/source/examples/wayland/minimal-qml/main.qml

@@ -0,0 +1,62 @@
+// Copyright (C) 2017 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR BSD-3-Clause
+
+import QtQuick
+import QtQuick.Window
+import QtWayland.Compositor
+import QtWayland.Compositor.XdgShell
+import QtWayland.Compositor.WlShell
+import QtWayland.Compositor.IviApplication
+
+//! [compositor]
+WaylandCompositor {
+//! [compositor]
+    // The output defines the screen.
+
+    //! [output]
+    WaylandOutput {
+        sizeFollowsWindow: true
+        window: Window {
+            width: 1024
+            height: 768
+            visible: true
+    //! [output]
+
+            //! [shell surface item]
+            Repeater {
+                model: shellSurfaces
+                // ShellSurfaceItem handles displaying a shell surface.
+                // It has implementations for things like interactive
+                // resize/move, and forwarding of mouse and keyboard
+                // events to the client process.
+                ShellSurfaceItem {
+                    shellSurface: modelData
+                    onSurfaceDestroyed: shellSurfaces.remove(index)
+                }
+            }
+            //! [shell surface item]
+        }
+    }
+
+    // Extensions are additions to the core Wayland
+    // protocol. We choose to support three different
+    // shells (window management protocols). When the
+    // client creates a new shell surface (i.e. a window)
+    // we append it to our list of shellSurfaces.
+
+    //! [shells]
+    WlShell {
+        onWlShellSurfaceCreated: (shellSurface) => shellSurfaces.append({shellSurface: shellSurface});
+    }
+    XdgShell {
+        onToplevelCreated: (toplevel, xdgSurface) => shellSurfaces.append({shellSurface: xdgSurface});
+    }
+    IviApplication {
+        onIviSurfaceCreated: (iviSurface) => shellSurfaces.append({shellSurface: iviSurface});
+    }
+    //! [shells]
+
+    //! [model]
+    ListModel { id: shellSurfaces }
+    //! [model]
+}

local/recipes/qt/qtwayland/source/examples/wayland/minimal-qml/minimal-qml.pro

@@ -0,0 +1,14 @@
+QT += gui qml
+
+SOURCES += \
+    main.cpp
+
+OTHER_FILES = \
+    main.qml
+
+RESOURCES += minimal-qml.qrc
+
+target.path = $$[QT_INSTALL_EXAMPLES]/wayland/minimal-qml
+sources.files = $$SOURCES $$HEADERS $$RESOURCES $$FORMS minimal-qml.pro
+sources.path = $$[QT_INSTALL_EXAMPLES]/wayland/minimal-qml
+INSTALLS += target sources

local/recipes/qt/qtwayland/source/examples/wayland/minimal-qml/minimal-qml.qrc

@@ -0,0 +1,5 @@
+<RCC>
+    <qresource prefix="/">
+        <file>main.qml</file>
+    </qresource>
+</RCC>