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/qtdeclarative/source/tests/baseline/scenegraph/scenegraph/CMakeLists.txt

@@ -0,0 +1,32 @@
+# Copyright (C) 2022 The Qt Company Ltd.
+# SPDX-License-Identifier: BSD-3-Clause
+
+#####################################################################
+## tst_baseline_scenegraph Test:
+#####################################################################
+
+if(NOT QT_BUILD_STANDALONE_TESTS AND NOT QT_BUILDING_QT)
+    cmake_minimum_required(VERSION 3.16)
+    project(tst_baseline_scenegraph LANGUAGES CXX)
+    find_package(Qt6BuildInternals REQUIRED COMPONENTS STANDALONE_TEST)
+endif()
+
+# Collect test data
+list(APPEND test_data "../data")
+
+qt_internal_add_test(tst_baseline_scenegraph
+    OUTPUT_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}/.."
+    SOURCES
+        ../../../../../qtbase/tests/baseline/shared/baselineprotocol.cpp
+        ../../../../../qtbase/tests/baseline/shared/baselineprotocol.h
+        ../../../../../qtbase/tests/baseline/shared/lookup3.cpp
+        ../../../../../qtbase/tests/baseline/shared/qbaselinetest.cpp
+        ../../../../../qtbase/tests/baseline/shared/qbaselinetest.h
+        tst_baseline_scenegraph.cpp
+    INCLUDE_DIRECTORIES
+        ../../../../../qtbase/tests/baseline/shared
+    LIBRARIES
+        Qt::Gui
+        Qt::Network
+    TESTDATA ${test_data}
+)

local/recipes/qt/qtdeclarative/source/tests/baseline/scenegraph/scenegraph/tst_baseline_scenegraph.cpp

@@ -0,0 +1,287 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0-only
+
+#include <qbaselinetest.h>
+
+#include <QtCore/QCoreApplication>
+#include <QtCore/QDirIterator>
+#include <QtCore/QDebug>
+#include <QtCore/QProcess>
+#include <QtGui/QImage>
+
+#include <algorithm>
+
+// qmlscenegrabber's default timeout, in ms
+#define SCENE_TIMEOUT 6000
+
+QString blockify(const QByteArray& s)
+{
+    const char* indent = "\n | ";
+    QByteArray block = s.trimmed();
+    block.replace('\n', indent);
+    block.prepend(indent);
+    block.append('\n');
+    return block;
+}
+
+//#define TEXTLESS_TEST
+
+class tst_Scenegraph : public QObject
+{
+    Q_OBJECT
+
+public:
+    tst_Scenegraph();
+
+private Q_SLOTS:
+    void initTestCase();
+    void init();
+    void cleanup();
+    void cleanupTestCase();
+#ifdef TEXTLESS_TEST
+    void testNoTextRendering_data();
+    void testNoTextRendering();
+#endif
+    void testRendering_data();
+    void testRendering();
+
+private:
+    void setupTestSuite(const QByteArray& filter = QByteArray());
+    void runTest(const QStringList& extraArgs = QStringList());
+    bool renderAndGrab(const QString& qmlFile, const QStringList& extraArgs, QImage *screenshot, QString *errMsg);
+    quint16 checksumFileOrDir(const QString &path);
+
+    QString testSuitePath;
+    QString grabberPath;
+    int grabberTimeout;
+    int consecutiveErrors;   // Not test failures (image mismatches), but system failures (so no image at all)
+    bool aborted;            // This run given up because of too many system failures
+};
+
+
+tst_Scenegraph::tst_Scenegraph()
+    : consecutiveErrors(0), aborted(false)
+{
+    int sceneTimeout = qEnvironmentVariableIntValue("LANCELOT_SCENE_TIMEOUT");
+    if (!sceneTimeout)
+        sceneTimeout = SCENE_TIMEOUT;
+    grabberTimeout = (sceneTimeout * 4) / 3; // Include some slack
+}
+
+
+void tst_Scenegraph::initTestCase()
+{
+    QString dataDir = QFINDTESTDATA("../data/.");
+    if (dataDir.isEmpty())
+        dataDir = QStringLiteral("data");
+    QFileInfo fi(dataDir);
+    if (!fi.exists() || !fi.isDir() || !fi.isReadable())
+        QSKIP("Test suite data directory missing or unreadable: " + fi.canonicalFilePath().toLatin1());
+    testSuitePath = fi.canonicalFilePath();
+
+#if defined(Q_OS_WIN)
+    grabberPath = QFINDTESTDATA("qmlscenegrabber.exe");
+#elif defined(Q_OS_DARWIN)
+    grabberPath = QFINDTESTDATA("qmlscenegrabber.app/Contents/MacOS/qmlscenegrabber");
+#else
+    grabberPath = QFINDTESTDATA("qmlscenegrabber");
+#endif
+    if (grabberPath.isEmpty())
+        grabberPath = QCoreApplication::applicationDirPath() + "/qmlscenegrabber";
+
+    const char *backendVarName = "QT_QUICK_BACKEND";
+    const QString backend = qEnvironmentVariable(backendVarName, QString::fromLatin1("default"));
+    QBaselineTest::addClientProperty(QString::fromLatin1(backendVarName), backend);
+
+    QString stack = backend;
+    if (stack != QLatin1String("software")) {
+#if defined(Q_OS_WIN)
+        const char *defaultRhiBackend = "d3d11";
+#elif defined(Q_OS_DARWIN)
+        const char *defaultRhiBackend = "metal";
+#else
+        const char *defaultRhiBackend = "opengl";
+#endif
+        const QString rhiBackend = qEnvironmentVariable("QSG_RHI_BACKEND", QString::fromLatin1(defaultRhiBackend));
+        stack = QString::fromLatin1("RHI_%1").arg(rhiBackend);
+    }
+    QBaselineTest::addClientProperty(QString::fromLatin1("GraphicsStack"), stack);
+
+    QByteArray msg;
+    if (!QBaselineTest::connectToBaselineServer(&msg))
+        QSKIP(msg);
+
+    const char *freezeEnv = "QT_QUICKVECTORIMAGE_FREEZE";
+    if (!qEnvironmentVariableIsSet(freezeEnv))
+        qputenv(freezeEnv, "-1");
+}
+
+void tst_Scenegraph::init()
+{
+    // This gets called for every row. QSKIP if current item is blacklisted on the baseline server:
+    QBASELINE_SKIP_IF_BLACKLISTED;
+}
+
+void tst_Scenegraph::cleanup()
+{
+    // Allow subsystems time to settle
+    if (!aborted)
+        QTest::qWait(grabberTimeout / 100);
+}
+
+void tst_Scenegraph::cleanupTestCase()
+{
+    QBaselineTest::finalizeAndDisconnect();
+}
+
+#ifdef TEXTLESS_TEST
+void tst_Scenegraph::testNoTextRendering_data()
+{
+    setupTestSuite("text/");
+    consecutiveErrors = 0;
+    aborted = false;
+}
+
+
+void tst_Scenegraph::testNoTextRendering()
+{
+    runTest(QStringList() << "-notext");
+}
+#endif
+
+void tst_Scenegraph::testRendering_data()
+{
+    setupTestSuite();
+    consecutiveErrors = 0;
+    aborted = false;
+}
+
+
+void tst_Scenegraph::testRendering()
+{
+    runTest();
+}
+
+
+void tst_Scenegraph::setupTestSuite(const QByteArray& filter)
+{
+    QTest::addColumn<QString>("qmlFile");
+    int numItems = 0;
+
+    QStringList ignoreItems;
+    QFile ignoreFile(testSuitePath + "/Ignore");
+    if (ignoreFile.open(QIODevice::ReadOnly)) {
+        while (!ignoreFile.atEnd()) {
+            QByteArray line = ignoreFile.readLine().trimmed();
+            if (!line.isEmpty() && !line.startsWith('#'))
+                ignoreItems += line;
+        }
+    }
+
+    QStringList itemFiles;
+    QDirIterator it(testSuitePath, QDirIterator::Subdirectories);
+    while (it.hasNext()) {
+        QString fp = it.next();
+        if (fp.endsWith(".qml")) {
+            QString itemName = fp.mid(testSuitePath.size() + 1);
+            if (!ignoreItems.contains(itemName) && (filter.isEmpty() || !itemName.startsWith(filter)))
+                itemFiles.append(it.filePath());
+        }
+    }
+
+    std::sort(itemFiles.begin(), itemFiles.end());
+    for (const QString &filePath : std::as_const(itemFiles)) {
+        QByteArray itemName = filePath.mid(testSuitePath.size() + 1).toLatin1();
+        QBaselineTest::newRow(itemName, checksumFileOrDir(filePath)) << filePath;
+        numItems++;
+    }
+
+    if (!numItems)
+        QSKIP("No .qml test files found in " + testSuitePath.toLatin1());
+}
+
+
+void tst_Scenegraph::runTest(const QStringList& extraArgs)
+{
+    // qDebug() << "Rendering" << QTest::currentDataTag();
+
+    if (aborted)
+        QSKIP("System too unstable.");
+
+    QFETCH(QString, qmlFile);
+
+    QImage screenShot;
+    QString errorMessage;
+    if (renderAndGrab(qmlFile, extraArgs, &screenShot, &errorMessage)) {
+        consecutiveErrors = 0;
+    }
+    else {
+        if (++consecutiveErrors >= 3 && QBaselineTest::shouldAbortIfUnstable())
+            aborted = true;                   // Just give up if screen grabbing fails 3 times in a row
+        QFAIL(qPrintable("QuickView grabbing failed: " + errorMessage));
+    }
+
+    QBASELINE_TEST(screenShot);
+}
+
+
+bool tst_Scenegraph::renderAndGrab(const QString& qmlFile, const QStringList& extraArgs, QImage *screenshot, QString *errMsg)
+{
+    bool usePipe = true;  // Whether to transport the grabbed image using temp. file or pipe. TBD: cmdline option
+    QProcess grabber;
+    grabber.setProcessChannelMode(QProcess::ForwardedErrorChannel);
+    QStringList args = extraArgs;
+    QString tmpfile = usePipe ? QString("-") : QString("/tmp/qmlscenegrabber-%1-out.ppm").arg(QCoreApplication::applicationPid());
+    args << qmlFile << "-o" << tmpfile;
+    grabber.start(grabberPath, args, QIODevice::ReadOnly);
+    grabber.waitForFinished(grabberTimeout);
+    if (grabber.state() != QProcess::NotRunning) {
+        grabber.terminate();
+        grabber.waitForFinished(grabberTimeout / 4);
+    }
+    QImage img;
+    bool res = usePipe ? img.load(&grabber, "ppm") : img.load(tmpfile);
+    if (!res || img.isNull()) {
+        if (errMsg) {
+            QString s("Failed to grab screen. qmlscenegrabber exitcode: %1. Process error: %2. Stderr:%3");
+            *errMsg = s.arg(grabber.exitCode()).arg(grabber.errorString()).arg(blockify(grabber.readAllStandardError()));
+        }
+        if (!usePipe)
+            QFile::remove(tmpfile);
+        return false;
+    }
+    if (screenshot)
+        *screenshot = img;
+    if (!usePipe)
+        QFile::remove(tmpfile);
+    return true;
+}
+
+
+quint16 tst_Scenegraph::checksumFileOrDir(const QString &path)
+{
+    QFileInfo fi(path);
+    if (!fi.exists() || !fi.isReadable())
+        return 0;
+    if (fi.isFile()) {
+        QFile f(path);
+        if (!f.open(QIODevice::ReadOnly))
+            qFatal("Could not open file %s", qPrintable(path));
+        QByteArray contents = f.readAll();
+        return qChecksum(contents);
+    }
+    if (fi.isDir()) {
+        static const QStringList nameFilters = QStringList() << "*.qml" << "*.cpp" << "*.png" << "*.jpg";
+        quint16 cs = 0;
+        const auto entryList = QDir(fi.filePath()).entryList(nameFilters,
+                                                             QDir::Dirs | QDir::Files | QDir::NoDotAndDotDot);
+        for (const QString &item : entryList)
+            cs ^= checksumFileOrDir(path + QLatin1Char('/') + item);
+        return cs;
+    }
+    return 0;
+}
+
+QBASELINETEST_MAIN(tst_Scenegraph)
+
+#include "tst_baseline_scenegraph.moc"