diff --git a/qmake/generators/makefile.cpp b/qmake/generators/makefile.cpp
index 82f9c00aec..c9c45990f4 100644
--- a/qmake/generators/makefile.cpp
+++ b/qmake/generators/makefile.cpp
@@ -2826,7 +2826,7 @@ MakefileGenerator::writeMakeQmake(QTextStream &t, bool noDummyQmakeAll)
 QFileInfo
 MakefileGenerator::fileInfo(QString file) const
 {
-    static QHash<FileInfoCacheKey, QFileInfo> *cache = nullptr;
+    Q_CONSTINIT static QHash<FileInfoCacheKey, QFileInfo> *cache = nullptr;
     static QFileInfo noInfo = QFileInfo();
     if(!cache) {
         cache = new QHash<FileInfoCacheKey, QFileInfo>;
diff --git a/qmake/generators/metamakefile.cpp b/qmake/generators/metamakefile.cpp
index 8ba941c213..964b4e900e 100644
--- a/qmake/generators/metamakefile.cpp
+++ b/qmake/generators/metamakefile.cpp
@@ -326,7 +326,7 @@ SubdirsMetaMakefileGenerator::init()
         if(!thispwd.endsWith('/'))
            thispwd += '/';
         const ProStringList &subdirs = project->values("SUBDIRS");
-        static int recurseDepth = -1;
+        Q_CONSTINIT static int recurseDepth = -1;
         ++recurseDepth;
         for(int i = 0; i < subdirs.size(); ++i) {
             Subdir *sub = new Subdir;
diff --git a/qmake/generators/win32/msvc_objectmodel.cpp b/qmake/generators/win32/msvc_objectmodel.cpp
index a18eb076bd..16210e8b2e 100644
--- a/qmake/generators/win32/msvc_objectmodel.cpp
+++ b/qmake/generators/win32/msvc_objectmodel.cpp
@@ -336,14 +336,12 @@ static QString vcCommandSeparator()
     // of the custom commands into it, and putting an "if errorlevel goto" statement behind it.
     // As we want every sub-command to be error-checked (as is done by makefile-based
     // backends), we insert the checks ourselves, using the undocumented jump target.
-    static QString cmdSep =
-    QLatin1String("&#x000D;&#x000A;if errorlevel 1 goto VCReportError&#x000D;&#x000A;");
-    return cmdSep;
+    return QStringLiteral("&#x000D;&#x000A;if errorlevel 1 goto VCReportError&#x000D;&#x000A;");
 }
 
 static void unknownOptionWarning(const char *tool, const char *option)
 {
-    static bool firstCall = true;
+    Q_CONSTINIT static bool firstCall = true;
     warn_msg(WarnLogic, "Could not parse %s option '%s'; added to AdditionalOptions.", tool, option);
     if (firstCall) {
         firstCall = false;
diff --git a/qmake/option.cpp b/qmake/option.cpp
index e9807a15b5..f30121e416 100644
--- a/qmake/option.cpp
+++ b/qmake/option.cpp
@@ -631,7 +631,7 @@ public:
         *data = nullptr;
     }
 };
-static QList<QMakeCacheClearItem*> cache_items;
+Q_CONSTINIT static QList<QMakeCacheClearItem*> cache_items;
 
 void
 qmakeClearCaches()
diff --git a/src/corelib/animation/qpropertyanimation.cpp b/src/corelib/animation/qpropertyanimation.cpp
index 87151161ac..157fb509e9 100644
--- a/src/corelib/animation/qpropertyanimation.cpp
+++ b/src/corelib/animation/qpropertyanimation.cpp
@@ -293,7 +293,7 @@ void QPropertyAnimation::updateState(QAbstractAnimation::State newState,
         auto locker = qt_unique_lock(mutex);
         typedef QPair<QObject *, QByteArray> QPropertyAnimationPair;
         typedef QHash<QPropertyAnimationPair, QPropertyAnimation*> QPropertyAnimationHash;
-        static QPropertyAnimationHash hash;
+        Q_CONSTINIT static QPropertyAnimationHash hash;
 
         // in case the targetObject gets deleted, the following happens:
         // 1. targetObject's destroyed signal calls our targetObjectDestroyed.
diff --git a/src/corelib/animation/qvariantanimation.cpp b/src/corelib/animation/qvariantanimation.cpp
index ca13506aa5..b471b51566 100644
--- a/src/corelib/animation/qvariantanimation.cpp
+++ b/src/corelib/animation/qvariantanimation.cpp
@@ -287,7 +287,7 @@ void QVariantAnimationPrivate::setCurrentValueForProgress(const qreal progress)
                                    localProgress);
     qSwap(currentValue, ret);
     q->updateCurrentValue(currentValue);
-    static QBasicAtomicInt changedSignalIndex = Q_BASIC_ATOMIC_INITIALIZER(0);
+    Q_CONSTINIT static QBasicAtomicInt changedSignalIndex = Q_BASIC_ATOMIC_INITIALIZER(0);
     if (!changedSignalIndex.loadRelaxed()) {
         //we keep the mask so that we emit valueChanged only when needed (for performance reasons)
         changedSignalIndex.testAndSetRelaxed(0, signalIndex("valueChanged(QVariant)"));
diff --git a/src/corelib/global/qlogging.cpp b/src/corelib/global/qlogging.cpp
index 6302fc9d80..e0dbfcf09b 100644
--- a/src/corelib/global/qlogging.cpp
+++ b/src/corelib/global/qlogging.cpp
@@ -1568,7 +1568,7 @@ QString qFormatLogMessage(QtMsgType type, const QMessageLogContext &context, con
 static void qDefaultMessageHandler(QtMsgType type, const QMessageLogContext &context, const QString &buf);
 
 // pointer to QtMessageHandler debug handler (with context)
-static QBasicAtomicPointer<void (QtMsgType, const QMessageLogContext &, const QString &)> messageHandler = Q_BASIC_ATOMIC_INITIALIZER(nullptr);
+Q_CONSTINIT static QBasicAtomicPointer<void (QtMsgType, const QMessageLogContext &, const QString &)> messageHandler = Q_BASIC_ATOMIC_INITIALIZER(nullptr);
 
 // ------------------------ Alternate logging sinks -------------------------
 
@@ -1873,7 +1873,7 @@ static void qDefaultMessageHandler(QtMsgType type, const QMessageLogContext &con
 
 #if defined(Q_COMPILER_THREAD_LOCAL)
 
-static thread_local bool msgHandlerGrabbed = false;
+Q_CONSTINIT static thread_local bool msgHandlerGrabbed = false;
 
 static bool grabMessageHandler()
 {
diff --git a/src/corelib/global/qrandom.cpp b/src/corelib/global/qrandom.cpp
index eb9aa542d3..daf0a46387 100644
--- a/src/corelib/global/qrandom.cpp
+++ b/src/corelib/global/qrandom.cpp
@@ -229,7 +229,7 @@ static void fallback_fill(quint32 *ptr, qsizetype left) noexcept
     arc4random_buf(ptr, left * sizeof(*ptr));
 }
 #else
-static QBasicAtomicInteger<unsigned> seed = Q_BASIC_ATOMIC_INITIALIZER(0U);
+Q_CONSTINIT static QBasicAtomicInteger<unsigned> seed = Q_BASIC_ATOMIC_INITIALIZER(0U);
 static void fallback_update_seed(unsigned value)
 {
     // Update the seed to be used for the fallback mechanism, if we need to.
@@ -379,7 +379,7 @@ struct QRandomGenerator::SystemAndGlobalGenerators
 
     static SystemAndGlobalGenerators *self()
     {
-        static SystemAndGlobalGenerators g;
+        Q_CONSTINIT static SystemAndGlobalGenerators g;
         static_assert(sizeof(g) > sizeof(QRandomGenerator64));
         return &g;
     }
diff --git a/src/corelib/io/qabstractfileengine.cpp b/src/corelib/io/qabstractfileengine.cpp
index d077e68161..d4dbfff25c 100644
--- a/src/corelib/io/qabstractfileengine.cpp
+++ b/src/corelib/io/qabstractfileengine.cpp
@@ -101,14 +101,14 @@ QT_BEGIN_NAMESPACE
     \sa QAbstractFileEngine, QAbstractFileEngine::create()
 */
 
-static QBasicAtomicInt qt_file_engine_handlers_in_use = Q_BASIC_ATOMIC_INITIALIZER(false);
+Q_CONSTINIT static QBasicAtomicInt qt_file_engine_handlers_in_use = Q_BASIC_ATOMIC_INITIALIZER(false);
 
 /*
     All application-wide handlers are stored in this list. The mutex must be
     acquired to ensure thread safety.
  */
 Q_GLOBAL_STATIC_WITH_ARGS(QReadWriteLock, fileEngineHandlerMutex, (QReadWriteLock::Recursive))
-static bool qt_abstractfileenginehandlerlist_shutDown = false;
+Q_CONSTINIT static bool qt_abstractfileenginehandlerlist_shutDown = false;
 class QAbstractFileEngineHandlerList : public QList<QAbstractFileEngineHandler *>
 {
 public:
diff --git a/src/corelib/io/qprocess.cpp b/src/corelib/io/qprocess.cpp
index e21827e64e..f58783d510 100644
--- a/src/corelib/io/qprocess.cpp
+++ b/src/corelib/io/qprocess.cpp
@@ -2434,7 +2434,7 @@ QT_BEGIN_INCLUDE_NAMESPACE
 # include <crt_externs.h>
 # define environ (*_NSGetEnviron())
 #elif defined(QT_PLATFORM_UIKIT)
-  static char *qt_empty_environ[] = { 0 };
+  Q_CONSTINIT static char *qt_empty_environ[] = { 0 };
 #define environ qt_empty_environ
 #elif !defined(Q_OS_WIN)
   extern char **environ;
diff --git a/src/corelib/io/qsettings.cpp b/src/corelib/io/qsettings.cpp
index 998cfad681..d1a6647eb6 100644
--- a/src/corelib/io/qsettings.cpp
+++ b/src/corelib/io/qsettings.cpp
@@ -134,7 +134,7 @@ Q_GLOBAL_STATIC(CustomFormatVector, customFormatVectorFunc)
 
 Q_CONSTINIT static QBasicMutex settingsGlobalMutex;
 
-static QSettings::Format globalDefaultFormat = QSettings::NativeFormat;
+Q_CONSTINIT static QSettings::Format globalDefaultFormat = QSettings::NativeFormat;
 
 QConfFile::QConfFile(const QString &fileName, bool _userPerms)
     : name(fileName), size(0), ref(1), userPerms(_userPerms)
diff --git a/src/corelib/io/qstandardpaths.cpp b/src/corelib/io/qstandardpaths.cpp
index 2f73cf27bb..d70a14fae1 100644
--- a/src/corelib/io/qstandardpaths.cpp
+++ b/src/corelib/io/qstandardpaths.cpp
@@ -611,7 +611,7 @@ QString QStandardPaths::displayName(StandardLocation type)
   \include standardpath/functiondocs.qdocinc setTestModeEnabled
 */
 
-static bool qsp_testMode = false;
+Q_CONSTINIT static bool qsp_testMode = false;
 
 void QStandardPaths::setTestModeEnabled(bool testMode)
 {
diff --git a/src/corelib/io/qurlidna.cpp b/src/corelib/io/qurlidna.cpp
index ae9192ab08..b099974a5f 100644
--- a/src/corelib/io/qurlidna.cpp
+++ b/src/corelib/io/qurlidna.cpp
@@ -352,7 +352,7 @@ static constexpr auto idn_whitelist = qOffsetStringArray(
     "xn--xkc2al3hye2a"          // Sri Lanka
 );
 
-static QStringList *user_idn_whitelist = nullptr;
+Q_CONSTINIT static QStringList *user_idn_whitelist = nullptr;
 
 static bool lessThan(const QChar *a, int l, const char *c)
 {
diff --git a/src/corelib/kernel/qabstracteventdispatcher.cpp b/src/corelib/kernel/qabstracteventdispatcher.cpp
index 5c94f2de42..4ecd92cf84 100644
--- a/src/corelib/kernel/qabstracteventdispatcher.cpp
+++ b/src/corelib/kernel/qabstracteventdispatcher.cpp
@@ -76,7 +76,7 @@ enum {
     Size5 = QtTimerIdFreeListConstants::MaxIndex - Offset5
 };
 
-const int QtTimerIdFreeListConstants::Sizes[QtTimerIdFreeListConstants::BlockCount] = {
+Q_CONSTINIT const int QtTimerIdFreeListConstants::Sizes[QtTimerIdFreeListConstants::BlockCount] = {
     Size0,
     Size1,
     Size2,
diff --git a/src/corelib/kernel/qapplicationstatic.h b/src/corelib/kernel/qapplicationstatic.h
index 93a5062776..44b7d050d7 100644
--- a/src/corelib/kernel/qapplicationstatic.h
+++ b/src/corelib/kernel/qapplicationstatic.h
@@ -53,9 +53,9 @@ template <typename QAS> struct ApplicationHolder
     using Type = typename QAS::QAS_Type;
     using PlainType = std::remove_cv_t<Type>;
 
-    static inline std::aligned_union_t<1, PlainType> storage;
-    static inline QBasicAtomicInteger<qint8> guard = { QtGlobalStatic::Uninitialized };
-    static inline QBasicMutex mutex {};
+    Q_CONSTINIT static inline std::aligned_union_t<1, PlainType> storage = {};
+    Q_CONSTINIT static inline QBasicAtomicInteger<qint8> guard = { QtGlobalStatic::Uninitialized };
+    Q_CONSTINIT static inline QBasicMutex mutex {};
 
     static constexpr bool MutexLockIsNoexcept = noexcept(mutex.lock());
     static constexpr bool ConstructionIsNoexcept = noexcept(QAS::innerFunction(nullptr));
diff --git a/src/corelib/kernel/qcore_unix_p.h b/src/corelib/kernel/qcore_unix_p.h
index 23c20b1749..83d18666ec 100644
--- a/src/corelib/kernel/qcore_unix_p.h
+++ b/src/corelib/kernel/qcore_unix_p.h
@@ -162,7 +162,7 @@ inline timeval timespecToTimeval(const timespec &ts)
 inline void qt_ignore_sigpipe()
 {
     // Set to ignore SIGPIPE once only.
-    static QBasicAtomicInt atom = Q_BASIC_ATOMIC_INITIALIZER(0);
+    Q_CONSTINIT static QBasicAtomicInt atom = Q_BASIC_ATOMIC_INITIALIZER(0);
     if (!atom.loadRelaxed()) {
         // More than one thread could turn off SIGPIPE at the same time
         // But that's acceptable because they all would be doing the same
diff --git a/src/corelib/kernel/qcoreapplication.cpp b/src/corelib/kernel/qcoreapplication.cpp
index 42f4af186f..f1c7f2002e 100644
--- a/src/corelib/kernel/qcoreapplication.cpp
+++ b/src/corelib/kernel/qcoreapplication.cpp
@@ -148,9 +148,9 @@ extern QString qAppFileName();
 # error "Bump QCoreApplicatoinPrivate::app_compile_version to QT_VERSION_CHECK(7, 0, 0)"
 #endif
 // We don't know exactly, but it's at least 6.0.0:
-int QCoreApplicationPrivate::app_compile_version = QT_VERSION_CHECK(6, 0, 0);
+Q_CONSTINIT int QCoreApplicationPrivate::app_compile_version = QT_VERSION_CHECK(6, 0, 0);
 
-bool QCoreApplicationPrivate::setuidAllowed = false;
+Q_CONSTINIT bool QCoreApplicationPrivate::setuidAllowed = false;
 
 #if !defined(Q_OS_WIN)
 #ifdef Q_OS_DARWIN
@@ -207,7 +207,7 @@ QString QCoreApplicationPrivate::appVersion() const
 }
 #endif // !Q_OS_WIN
 
-QString *QCoreApplicationPrivate::cachedApplicationFilePath = nullptr;
+Q_CONSTINIT QString *QCoreApplicationPrivate::cachedApplicationFilePath = nullptr;
 
 bool QCoreApplicationPrivate::checkInstance(const char *function)
 {
@@ -353,9 +353,9 @@ void Q_CORE_EXPORT qt_call_post_routines()
 #ifndef QT_NO_QOBJECT
 
 // app starting up if false
-bool QCoreApplicationPrivate::is_app_running = false;
+Q_CONSTINIT bool QCoreApplicationPrivate::is_app_running = false;
  // app closing down if true
-bool QCoreApplicationPrivate::is_app_closing = false;
+Q_CONSTINIT bool QCoreApplicationPrivate::is_app_closing = false;
 
 Q_CORE_EXPORT uint qGlobalPostedEventsCount()
 {
@@ -363,12 +363,12 @@ Q_CORE_EXPORT uint qGlobalPostedEventsCount()
     return currentThreadData->postEventList.size() - currentThreadData->postEventList.startOffset;
 }
 
-QAbstractEventDispatcher *QCoreApplicationPrivate::eventDispatcher = nullptr;
+Q_CONSTINIT QAbstractEventDispatcher *QCoreApplicationPrivate::eventDispatcher = nullptr;
 
 #endif // QT_NO_QOBJECT
 
-QCoreApplication *QCoreApplication::self = nullptr;
-uint QCoreApplicationPrivate::attribs =
+Q_CONSTINIT QCoreApplication *QCoreApplication::self = nullptr;
+Q_CONSTINIT uint QCoreApplicationPrivate::attribs =
     (1 << Qt::AA_SynthesizeMouseForUnhandledTouchEvents) |
     (1 << Qt::AA_SynthesizeMouseForUnhandledTabletEvents);
 
@@ -403,7 +403,7 @@ struct QCoreApplicationData {
 Q_GLOBAL_STATIC(QCoreApplicationData, coreappdata)
 
 #ifndef QT_NO_QOBJECT
-static bool quitLockEnabled = true;
+Q_CONSTINIT static bool quitLockEnabled = true;
 #endif
 
 #if defined(Q_OS_WIN)
@@ -536,7 +536,7 @@ void QCoreApplicationPrivate::eventDispatcherReady()
 {
 }
 
-QBasicAtomicPointer<QThread> QCoreApplicationPrivate::theMainThread = Q_BASIC_ATOMIC_INITIALIZER(nullptr);
+Q_CONSTINIT QBasicAtomicPointer<QThread> QCoreApplicationPrivate::theMainThread = Q_BASIC_ATOMIC_INITIALIZER(nullptr);
 QThread *QCoreApplicationPrivate::mainThread()
 {
     Q_ASSERT(theMainThread.loadRelaxed() != nullptr);
@@ -592,7 +592,7 @@ QString qAppName()
 void QCoreApplicationPrivate::initLocale()
 {
 #if defined(Q_OS_UNIX) && !defined(QT_BOOTSTRAPPED)
-    static bool qt_locale_initialized = false;
+    Q_CONSTINIT static bool qt_locale_initialized = false;
     if (qt_locale_initialized)
         return;
     qt_locale_initialized = true;
diff --git a/src/corelib/kernel/qcoreevent.cpp b/src/corelib/kernel/qcoreevent.cpp
index ebb601722f..34b57bb4f8 100644
--- a/src/corelib/kernel/qcoreevent.cpp
+++ b/src/corelib/kernel/qcoreevent.cpp
@@ -499,7 +499,7 @@ struct QBasicAtomicBitField {
 
 typedef QBasicAtomicBitField<QEvent::MaxUser - QEvent::User + 1> UserEventTypeRegistry;
 
-static UserEventTypeRegistry userEventTypeRegistry {};
+Q_CONSTINIT static UserEventTypeRegistry userEventTypeRegistry {};
 
 static inline int registerEventTypeZeroBased(int id) noexcept
 {
diff --git a/src/corelib/kernel/qeventdispatcher_glib.cpp b/src/corelib/kernel/qeventdispatcher_glib.cpp
index cff3efd1cc..969ef7a31f 100644
--- a/src/corelib/kernel/qeventdispatcher_glib.cpp
+++ b/src/corelib/kernel/qeventdispatcher_glib.cpp
@@ -112,7 +112,7 @@ static gboolean socketNotifierSourceDispatch(GSource *source, GSourceFunc, gpoin
     return true; // ??? don't remove, right?
 }
 
-static GSourceFuncs socketNotifierSourceFuncs = {
+Q_CONSTINIT static GSourceFuncs socketNotifierSourceFuncs = {
     socketNotifierSourcePrepare,
     socketNotifierSourceCheck,
     socketNotifierSourceDispatch,
@@ -186,7 +186,7 @@ static gboolean timerSourceDispatch(GSource *source, GSourceFunc, gpointer)
     return true; // ??? don't remove, right again?
 }
 
-static GSourceFuncs timerSourceFuncs = {
+Q_CONSTINIT static GSourceFuncs timerSourceFuncs = {
     timerSourcePrepare,
     timerSourceCheck,
     timerSourceDispatch,
@@ -233,7 +233,7 @@ static gboolean idleTimerSourceDispatch(GSource *source, GSourceFunc, gpointer)
     return true;
 }
 
-static GSourceFuncs idleTimerSourceFuncs = {
+Q_CONSTINIT static GSourceFuncs idleTimerSourceFuncs = {
     idleTimerSourcePrepare,
     idleTimerSourceCheck,
     idleTimerSourceDispatch,
@@ -281,7 +281,7 @@ static gboolean postEventSourceDispatch(GSource *s, GSourceFunc, gpointer)
     return true; // i dunno, george...
 }
 
-static GSourceFuncs postEventSourceFuncs = {
+Q_CONSTINIT static GSourceFuncs postEventSourceFuncs = {
     postEventSourcePrepare,
     postEventSourceCheck,
     postEventSourceDispatch,
diff --git a/src/corelib/kernel/qeventdispatcher_wasm.cpp b/src/corelib/kernel/qeventdispatcher_wasm.cpp
index 3732a745ce..62d13b4ec8 100644
--- a/src/corelib/kernel/qeventdispatcher_wasm.cpp
+++ b/src/corelib/kernel/qeventdispatcher_wasm.cpp
@@ -118,11 +118,12 @@ bool qt_asyncify_yield()
 
 #endif // QT_HAVE_EMSCRIPTEN_ASYNCIFY
 
-QEventDispatcherWasm *QEventDispatcherWasm::g_mainThreadEventDispatcher = nullptr;
+Q_CONSTINIT QEventDispatcherWasm *QEventDispatcherWasm::g_mainThreadEventDispatcher = nullptr;
 #if QT_CONFIG(thread)
-QVector<QEventDispatcherWasm *> QEventDispatcherWasm::g_secondaryThreadEventDispatchers;
-std::mutex QEventDispatcherWasm::g_secondaryThreadEventDispatchersMutex;
+Q_CONSTINIT QVector<QEventDispatcherWasm *> QEventDispatcherWasm::g_secondaryThreadEventDispatchers;
+Q_CONSTINIT std::mutex QEventDispatcherWasm::g_secondaryThreadEventDispatchersMutex;
 #endif
+// ### dynamic initialization:
 std::multimap<int, QSocketNotifier *> QEventDispatcherWasm::g_socketNotifiers;
 
 QEventDispatcherWasm::QEventDispatcherWasm()
diff --git a/src/corelib/kernel/qmetatype.cpp b/src/corelib/kernel/qmetatype.cpp
index 9f18679763..bfcf546340 100644
--- a/src/corelib/kernel/qmetatype.cpp
+++ b/src/corelib/kernel/qmetatype.cpp
@@ -1548,8 +1548,8 @@ static const struct : QMetaTypeModuleHelper
     }
 } metatypeHelper = {};
 
-Q_CORE_EXPORT const QMetaTypeModuleHelper *qMetaTypeGuiHelper = nullptr;
-Q_CORE_EXPORT const QMetaTypeModuleHelper *qMetaTypeWidgetsHelper = nullptr;
+Q_CONSTINIT Q_CORE_EXPORT const QMetaTypeModuleHelper *qMetaTypeGuiHelper = nullptr;
+Q_CONSTINIT Q_CORE_EXPORT const QMetaTypeModuleHelper *qMetaTypeWidgetsHelper = nullptr;
 
 static const QMetaTypeModuleHelper *qModuleHelperForType(int type)
 {
diff --git a/src/corelib/kernel/qmetatype.h b/src/corelib/kernel/qmetatype.h
index 615ea52a56..a8962f8b57 100644
--- a/src/corelib/kernel/qmetatype.h
+++ b/src/corelib/kernel/qmetatype.h
@@ -1323,7 +1323,7 @@ struct QMetaTypeIdQObject<T*, QMetaType::PointerToQObject>
 
     static int qt_metatype_id()
     {
-        static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0);
+        Q_CONSTINIT static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0);
         if (const int id = metatype_id.loadAcquire())
             return id;
         const char *const cName = T::staticMetaObject.className();
@@ -1345,7 +1345,7 @@ struct QMetaTypeIdQObject<T, QMetaType::IsGadget>
 
     static int qt_metatype_id()
     {
-        static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0);
+        Q_CONSTINIT static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0);
         if (const int id = metatype_id.loadAcquire())
             return id;
         const char *const cName = T::staticMetaObject.className();
@@ -1364,7 +1364,7 @@ struct QMetaTypeIdQObject<T*, QMetaType::PointerToGadget>
 
     static int qt_metatype_id()
     {
-        static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0);
+        Q_CONSTINIT static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0);
         if (const int id = metatype_id.loadAcquire())
             return id;
         const char *const cName = T::staticMetaObject.className();
@@ -1386,7 +1386,7 @@ struct QMetaTypeIdQObject<T, QMetaType::IsEnumeration>
 
     static int qt_metatype_id()
     {
-        static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0);
+        Q_CONSTINIT static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0);
         if (const int id = metatype_id.loadAcquire())
             return id;
         const char *eName = qt_getEnumName(T());
@@ -1421,7 +1421,7 @@ struct QMetaTypeIdQObject<T, QMetaType::IsEnumeration>
         enum { Defined = 1 };                                           \
         static int qt_metatype_id()                                     \
             {                                                           \
-                static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0); \
+                Q_CONSTINIT static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0); \
                 if (const int id = metatype_id.loadAcquire())           \
                     return id;                                          \
                 constexpr auto arr = QtPrivate::typenameHelper<TYPE>(); \
@@ -1469,7 +1469,7 @@ struct QMetaTypeId< SINGLE_ARG_TEMPLATE<T> > \
     }; \
     static int qt_metatype_id() \
     { \
-        static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0); \
+        Q_CONSTINIT static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0); \
         if (const int id = metatype_id.loadRelaxed()) \
             return id; \
         const char *tName = QMetaType::fromType<T>().name(); \
@@ -1497,7 +1497,7 @@ struct QMetaTypeId< DOUBLE_ARG_TEMPLATE<T, U> > \
     }; \
     static int qt_metatype_id() \
     { \
-        static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0); \
+        Q_CONSTINIT static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0); \
         if (const int id = metatype_id.loadAcquire()) \
             return id; \
         const char *tName = QMetaType::fromType<T>().name(); \
@@ -1545,7 +1545,7 @@ struct SharedPointerMetaTypeIdHelper<SMART_POINTER<T>, true> \
     }; \
     static int qt_metatype_id() \
     { \
-        static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0); \
+        Q_CONSTINIT static QBasicAtomicInt metatype_id = Q_BASIC_ATOMIC_INITIALIZER(0); \
         if (const int id = metatype_id.loadAcquire()) \
             return id; \
         const char * const cName = T::staticMetaObject.className(); \
diff --git a/src/corelib/kernel/qproperty.cpp b/src/corelib/kernel/qproperty.cpp
index b2ef09db2f..297a672d6a 100644
--- a/src/corelib/kernel/qproperty.cpp
+++ b/src/corelib/kernel/qproperty.cpp
@@ -198,7 +198,7 @@ struct QPropertyDelayedNotifications
     }
 };
 
-static thread_local QBindingStatus bindingStatus;
+Q_CONSTINIT static thread_local QBindingStatus bindingStatus;
 
 /*!
     \since 6.2
diff --git a/src/corelib/mimetypes/qmimedatabase.cpp b/src/corelib/mimetypes/qmimedatabase.cpp
index 8510bdca93..18b5417103 100644
--- a/src/corelib/mimetypes/qmimedatabase.cpp
+++ b/src/corelib/mimetypes/qmimedatabase.cpp
@@ -89,6 +89,7 @@ QMimeDatabasePrivate::~QMimeDatabasePrivate()
 {
 }
 
+Q_CONSTINIT
 #ifdef QT_BUILD_INTERNAL
 Q_CORE_EXPORT
 #else
diff --git a/src/corelib/serialization/qjsonparser.cpp b/src/corelib/serialization/qjsonparser.cpp
index fbd28934e1..9dbb59464c 100644
--- a/src/corelib/serialization/qjsonparser.cpp
+++ b/src/corelib/serialization/qjsonparser.cpp
@@ -50,7 +50,7 @@
 
 //#define PARSER_DEBUG
 #ifdef PARSER_DEBUG
-static int indent = 0;
+Q_CONSTINIT static int indent = 0;
 #define BEGIN qDebug() << QByteArray(4*indent++, ' ').constData() << "pos=" << current
 #define END --indent
 #define DEBUG qDebug() << QByteArray(4*indent, ' ').constData()
diff --git a/src/corelib/text/qbytearray.cpp b/src/corelib/text/qbytearray.cpp
index 88aef5989f..d9518c9e8f 100644
--- a/src/corelib/text/qbytearray.cpp
+++ b/src/corelib/text/qbytearray.cpp
@@ -70,7 +70,7 @@
 
 QT_BEGIN_NAMESPACE
 
-const char QByteArray::_empty = '\0';
+Q_CONSTINIT const char QByteArray::_empty = '\0';
 
 // ASCII case system, used by QByteArray::to{Upper,Lower}() and qstr(n)icmp():
 static constexpr inline uchar asciiUpper(uchar c)
diff --git a/src/corelib/text/qlocale.cpp b/src/corelib/text/qlocale.cpp
index dd92cfe354..6a191dfce6 100644
--- a/src/corelib/text/qlocale.cpp
+++ b/src/corelib/text/qlocale.cpp
@@ -87,7 +87,7 @@ QT_BEGIN_NAMESPACE
 using namespace Qt::StringLiterals;
 
 #ifndef QT_NO_SYSTEMLOCALE
-static QSystemLocale *_systemLocale = nullptr;
+Q_CONSTINIT static QSystemLocale *_systemLocale = nullptr;
 class QSystemLocaleSingleton: public QSystemLocale
 {
 public:
@@ -95,7 +95,7 @@ public:
 };
 
 Q_GLOBAL_STATIC(QSystemLocaleSingleton, QSystemLocale_globalSystemLocale)
-static QLocaleData systemLocaleData;
+Q_CONSTINIT static QLocaleData systemLocaleData = {};
 #endif
 
 /******************************************************************************
@@ -695,7 +695,7 @@ int qt_repeatCount(QStringView s)
     return int(j);
 }
 
-static const QLocaleData *default_data = nullptr;
+Q_CONSTINIT static const QLocaleData *default_data = nullptr;
 
 static const QLocaleData *const c_data = locale_data;
 static QLocalePrivate *c_private()
@@ -852,7 +852,7 @@ QDataStream &operator>>(QDataStream &ds, QLocale &l)
 
 static const int locale_data_size = sizeof(locale_data)/sizeof(QLocaleData) - 1;
 
-QBasicAtomicInt QLocalePrivate::s_generation = Q_BASIC_ATOMIC_INITIALIZER(0);
+Q_CONSTINIT QBasicAtomicInt QLocalePrivate::s_generation = Q_BASIC_ATOMIC_INITIALIZER(0);
 Q_GLOBAL_STATIC_WITH_ARGS(QSharedDataPointer<QLocalePrivate>, defaultLocalePrivate,
                           (new QLocalePrivate(defaultData(), defaultIndex())))
 
diff --git a/src/corelib/text/qunicodetools.cpp b/src/corelib/text/qunicodetools.cpp
index bba950102e..ff11baa99a 100644
--- a/src/corelib/text/qunicodetools.cpp
+++ b/src/corelib/text/qunicodetools.cpp
@@ -1404,12 +1404,12 @@ typedef int (*th_brk_def) (const unsigned char*, int*, size_t);
 typedef size_t (*th_next_cell_def) (const unsigned char *, size_t, struct thcell_t *, int);
 
 /* libthai related function handles */
-static th_brk_def th_brk = nullptr;
-static th_next_cell_def th_next_cell = nullptr;
+Q_CONSTINIT static th_brk_def th_brk = nullptr;
+Q_CONSTINIT static th_next_cell_def th_next_cell = nullptr;
 
 static int init_libthai() {
 #if QT_CONFIG(library)
-    static bool initialized = false;
+    Q_CONSTINIT static bool initialized = false;
     if (!initialized && (!th_brk || !th_next_cell)) {
         th_brk = reinterpret_cast<th_brk_def>(QLibrary::resolve("thai"_L1, static_cast<int>(LIBTHAI_MAJOR), "th_brk"));
         th_next_cell = (th_next_cell_def)QLibrary::resolve("thai"_L1, LIBTHAI_MAJOR, "th_next_cell");
diff --git a/src/corelib/thread/qmutex.cpp b/src/corelib/thread/qmutex.cpp
index ace0e6c033..1e3ba79624 100644
--- a/src/corelib/thread/qmutex.cpp
+++ b/src/corelib/thread/qmutex.cpp
@@ -835,7 +835,7 @@ struct FreeListConstants : QFreeListDefaultConstants {
     enum { BlockCount = 4, MaxIndex=0xffff };
     static const int Sizes[BlockCount];
 };
-const int FreeListConstants::Sizes[FreeListConstants::BlockCount] = {
+Q_CONSTINIT const int FreeListConstants::Sizes[FreeListConstants::BlockCount] = {
     16,
     128,
     1024,
@@ -844,7 +844,7 @@ const int FreeListConstants::Sizes[FreeListConstants::BlockCount] = {
 
 typedef QFreeList<QMutexPrivate, FreeListConstants> FreeList;
 // We cannot use Q_GLOBAL_STATIC because it uses QMutex
-static FreeList freeList_;
+Q_CONSTINIT static FreeList freeList_;
 FreeList *freelist()
 {
     return &freeList_;
diff --git a/src/corelib/thread/qreadwritelock.cpp b/src/corelib/thread/qreadwritelock.cpp
index 4c2a9c4251..b9716cb26f 100644
--- a/src/corelib/thread/qreadwritelock.cpp
+++ b/src/corelib/thread/qreadwritelock.cpp
@@ -619,7 +619,7 @@ struct FreeListConstants : QFreeListDefaultConstants {
     enum { BlockCount = 4, MaxIndex=0xffff };
     static const int Sizes[BlockCount];
 };
-const int FreeListConstants::Sizes[FreeListConstants::BlockCount] = {
+Q_CONSTINIT const int FreeListConstants::Sizes[FreeListConstants::BlockCount] = {
     16,
     128,
     1024,
diff --git a/src/corelib/thread/qthread.cpp b/src/corelib/thread/qthread.cpp
index 994d77926c..edff18fcf5 100644
--- a/src/corelib/thread/qthread.cpp
+++ b/src/corelib/thread/qthread.cpp
@@ -176,7 +176,7 @@ QThreadPrivate::QThreadPrivate(QThreadData *d)
 #ifdef Q_OS_INTEGRITY
     stackSize = 128 * 1024;
 #elif defined(Q_OS_RTEMS)
-    static bool envStackSizeOk = false;
+    Q_CONSTINIT static bool envStackSizeOk = false;
     static const int envStackSize = qEnvironmentVariableIntValue("QT_DEFAULT_THREAD_STACK_SIZE", &envStackSizeOk);
     if (envStackSizeOk)
         stackSize = envStackSize;
@@ -923,7 +923,7 @@ bool QThread::isRunning() const
 }
 
 // No threads: so we can just use static variables
-static QThreadData *data = nullptr;
+Q_CONSTINIT static QThreadData *data = nullptr;
 
 QThreadData *QThreadData::current(bool createIfNecessary)
 {
diff --git a/src/corelib/thread/qthread_unix.cpp b/src/corelib/thread/qthread_unix.cpp
index ed3f3f68be..a458df86f5 100644
--- a/src/corelib/thread/qthread_unix.cpp
+++ b/src/corelib/thread/qthread_unix.cpp
@@ -113,10 +113,10 @@ static_assert(sizeof(pthread_t) <= sizeof(Qt::HANDLE));
 enum { ThreadPriorityResetFlag = 0x80000000 };
 
 
-static thread_local QThreadData *currentThreadData = nullptr;
+Q_CONSTINIT static thread_local QThreadData *currentThreadData = nullptr;
 
-static pthread_once_t current_thread_data_once = PTHREAD_ONCE_INIT;
-static pthread_key_t current_thread_data_key;
+Q_CONSTINIT static pthread_once_t current_thread_data_once = PTHREAD_ONCE_INIT;
+Q_CONSTINIT static pthread_key_t current_thread_data_key;
 
 static void destroy_current_thread_data(void *p)
 {
diff --git a/src/corelib/time/qtimezoneprivate_tz.cpp b/src/corelib/time/qtimezoneprivate_tz.cpp
index 24871e167e..4244e72e50 100644
--- a/src/corelib/time/qtimezoneprivate_tz.cpp
+++ b/src/corelib/time/qtimezoneprivate_tz.cpp
@@ -1389,7 +1389,7 @@ QByteArray QTzTimeZonePrivate::staticSystemTimeZoneId()
         ianaId = ianaId.mid(1);
 
     if (ianaId.isEmpty()) {
-        thread_local static ZoneNameReader reader;
+        Q_CONSTINIT thread_local static ZoneNameReader reader;
         ianaId = reader.name();
     }
 
diff --git a/src/corelib/tools/qcryptographichash.cpp b/src/corelib/tools/qcryptographichash.cpp
index 3e6ce016ea..89b5763c5f 100644
--- a/src/corelib/tools/qcryptographichash.cpp
+++ b/src/corelib/tools/qcryptographichash.cpp
@@ -79,17 +79,17 @@ typedef HashReturn (SHA3Final)(hashState *state, BitSequence *hashval);
 
 #include "../../3rdparty/sha3/KeccakF-1600-opt64.c"
 
-static SHA3Init * const sha3Init = Init;
-static SHA3Update * const sha3Update = Update;
-static SHA3Final * const sha3Final = Final;
+Q_CONSTINIT static SHA3Init * const sha3Init = Init;
+Q_CONSTINIT static SHA3Update * const sha3Update = Update;
+Q_CONSTINIT static SHA3Final * const sha3Final = Final;
 
 #else // 32 bit optimised fallback
 
 #include "../../3rdparty/sha3/KeccakF-1600-opt32.c"
 
-static SHA3Init * const sha3Init = Init;
-static SHA3Update * const sha3Update = Update;
-static SHA3Final * const sha3Final = Final;
+Q_CONSTINIT static SHA3Init * const sha3Init = Init;
+Q_CONSTINIT static SHA3Update * const sha3Update = Update;
+Q_CONSTINIT static SHA3Final * const sha3Final = Final;
 
 #endif
 
diff --git a/src/corelib/tools/qfreelist.cpp b/src/corelib/tools/qfreelist.cpp
index 38ad13a1ee..de34d6de0d 100644
--- a/src/corelib/tools/qfreelist.cpp
+++ b/src/corelib/tools/qfreelist.cpp
@@ -54,7 +54,7 @@ enum {
     Size3 = QFreeListDefaultConstants::MaxIndex - Offset3
 };
 
-const int QFreeListDefaultConstants::Sizes[QFreeListDefaultConstants::BlockCount] = {
+Q_CONSTINIT const int QFreeListDefaultConstants::Sizes[QFreeListDefaultConstants::BlockCount] = {
     Size0,
     Size1,
     Size2,
diff --git a/src/corelib/tools/qhash.cpp b/src/corelib/tools/qhash.cpp
index eb9c1590d2..24e710c2e5 100644
--- a/src/corelib/tools/qhash.cpp
+++ b/src/corelib/tools/qhash.cpp
@@ -204,6 +204,8 @@ inline HashSeedStorage::StateResult HashSeedStorage::state(int which)
 */
 #ifdef Q_DECL_INIT_PRIORITY
 Q_DECL_INIT_PRIORITY(05)
+#else
+Q_CONSTINIT
 #endif
 static HashSeedStorage qt_qhash_seed;
 
diff --git a/src/dbus/qdbus_symbols.cpp b/src/dbus/qdbus_symbols.cpp
index 0eccbe669e..59044aa1db 100644
--- a/src/dbus/qdbus_symbols.cpp
+++ b/src/dbus/qdbus_symbols.cpp
@@ -56,7 +56,7 @@ void (*qdbus_resolve_me(const char *name))();
 #if !defined QT_LINKED_LIBDBUS
 
 #if QT_CONFIG(library)
-static QLibrary *qdbus_libdbus = nullptr;
+Q_CONSTINIT static QLibrary *qdbus_libdbus = nullptr;
 
 void qdbus_unloadLibDBus()
 {
diff --git a/src/dbus/qdbus_symbols_p.h b/src/dbus/qdbus_symbols_p.h
index accaa4f5ed..ee15c36649 100644
--- a/src/dbus/qdbus_symbols_p.h
+++ b/src/dbus/qdbus_symbols_p.h
@@ -88,7 +88,7 @@ struct TraceDBusCall
 
     static inline ThreadData &td()
     {
-        static thread_local ThreadData value;
+        Q_CONSTINIT static thread_local ThreadData value;
         return value;
     }
 
diff --git a/src/gui/kernel/qguiapplication.cpp b/src/gui/kernel/qguiapplication.cpp
index f45cf1fb78..9d383355e1 100644
--- a/src/gui/kernel/qguiapplication.cpp
+++ b/src/gui/kernel/qguiapplication.cpp
@@ -143,7 +143,7 @@ QT_BEGIN_NAMESPACE
     }
 
 Q_CORE_EXPORT void qt_call_post_routines();
-Q_GUI_EXPORT bool qt_is_tty_app = false;
+Q_CONSTINIT Q_GUI_EXPORT bool qt_is_tty_app = false;
 
 Q_CONSTINIT Qt::MouseButtons QGuiApplicationPrivate::mouse_buttons = Qt::NoButton;
 Q_CONSTINIT Qt::KeyboardModifiers QGuiApplicationPrivate::modifier_buttons = Qt::NoModifier;