10 files changed, 59 insertions, 17 deletions
diff --git a/src/corelib/global/qconfig-bootstrapped.h b/src/corelib/global/qconfig-bootstrapped.h
index 681f379ed10..57f4b9eb6a0 100644
--- a/src/corelib/global/qconfig-bootstrapped.h
+++ b/src/corelib/global/qconfig-bootstrapped.h
@@ -92,6 +92,7 @@
 #define QT_FEATURE_topleveldomain -1
 #define QT_NO_TRANSLATION
 #define QT_FEATURE_translation -1
+#define QT_NO_VARIANT -1
 
 #define QT_NO_COMPRESS
 
diff --git a/src/corelib/kernel/qmetatype.cpp b/src/corelib/kernel/qmetatype.cpp
index 3ccff5ae5f8..ae56de118c8 100644
--- a/src/corelib/kernel/qmetatype.cpp
+++ b/src/corelib/kernel/qmetatype.cpp
@@ -21,7 +21,6 @@
 #include "qeasingcurve.h"
 #endif
 #include "quuid.h"
-#include "qvariant.h"
 
 #if QT_CONFIG(regularexpression)
 #  include "qregularexpression.h"
@@ -1271,8 +1270,11 @@ static constexpr struct : QMetaTypeModuleHelper
         QMETATYPE_CONVERTER_ASSIGN(QRectF, QRect);
         QMETATYPE_CONVERTER(QPoint, QPointF, result = source.toPoint(); return true;);
         QMETATYPE_CONVERTER_ASSIGN(QPointF, QPoint);
- #endif
+#endif
+
+        QMETATYPE_CONVERTER(QStringList, QString, result = QStringList() << source; return true;);
 
+#ifndef QT_NO_VARIANT
         QMETATYPE_CONVERTER(QByteArrayList, QVariantList,
             result.reserve(source.size());
             for (const auto &v: source)
@@ -1298,7 +1300,6 @@ static constexpr struct : QMetaTypeModuleHelper
                 result.append(QVariant(v));
             return true;
         );
-        QMETATYPE_CONVERTER(QStringList, QString, result = QStringList() << source; return true;);
 
         QMETATYPE_CONVERTER(QVariantHash, QVariantMap,
             for (auto it = source.begin(); it != source.end(); ++it)
@@ -1310,7 +1311,7 @@ static constexpr struct : QMetaTypeModuleHelper
                 result.insert(it.key(), it.value());
             return true;
         );
-
+#endif // !QT_NO_VARIANT
 #ifndef QT_BOOTSTRAPPED
         QMETATYPE_CONVERTER_ASSIGN(QCborValue, QString);
         QMETATYPE_CONVERTER(QString, QCborValue,
@@ -2092,7 +2093,6 @@ static bool convertIterableToVariantHash(QMetaType fromType, const void *from, v
         h.insert(it.key().toString(), it.value());
     return true;
 }
-#endif
 
 static bool convertIterableToVariantPair(QMetaType fromType, const void *from, void *to)
 {
@@ -2124,7 +2124,6 @@ static bool convertIterableToVariantPair(QMetaType fromType, const void *from, v
     return true;
 }
 
-#ifndef QT_BOOTSTRAPPED
 static bool convertToSequentialIterable(QMetaType fromType, const void *from, void *to)
 {
     using namespace QtMetaTypePrivate;
@@ -2335,7 +2334,7 @@ static bool convertMetaObject(QMetaType fromType, const void *from, QMetaType to
     }
     return false;
 }
-#endif
+#endif // !QT_BOOTSTRAPPED
 
 /*!
     \fn bool QMetaType::convert(const void *from, int fromTypeId, void *to, int toTypeId)
@@ -2392,10 +2391,11 @@ bool QMetaType::convert(QMetaType fromType, const void *from, QMetaType toType,
         }
     }
 
+#ifndef QT_BOOTSTRAPPED
+# ifndef QT_NO_VARIANT
     if (toTypeId == QVariantPair && convertIterableToVariantPair(fromType, from, to))
         return true;
 
-#ifndef QT_BOOTSTRAPPED
     // handle iterables
     if (toTypeId == QVariantList && convertIterableToVariantList(fromType, from, to))
         return true;
@@ -2405,6 +2405,7 @@ bool QMetaType::convert(QMetaType fromType, const void *from, QMetaType toType,
 
     if (toTypeId == QVariantHash && convertIterableToVariantHash(fromType, from, to))
         return true;
+#  endif
 
     if (toTypeId == qMetaTypeId<QSequentialIterable>())
         return convertToSequentialIterable(fromType, from, to);
@@ -2588,7 +2589,8 @@ bool QMetaType::canConvert(QMetaType fromType, QMetaType toType)
 
     if (toTypeId == qMetaTypeId<QAssociativeIterable>())
         return canConvertToAssociativeIterable(fromType);
-
+#endif
+#ifndef QT_NO_VARIANT
     if (toTypeId == QVariantList
             && canConvert(fromType, QMetaType::fromType<QSequentialIterable>())) {
         return true;
@@ -2598,11 +2600,11 @@ bool QMetaType::canConvert(QMetaType fromType, QMetaType toType)
             && canConvert(fromType, QMetaType::fromType<QAssociativeIterable>())) {
         return true;
     }
-#endif
 
     if (toTypeId == QVariantPair && hasRegisteredConverterFunction(
                     fromType, QMetaType::fromType<QtMetaTypePrivate::QPairVariantInterfaceImpl>()))
         return true;
+#endif
 
     if (fromType.flags() & IsEnumeration) {
         if (toTypeId == QString || toTypeId == QByteArray)
diff --git a/src/corelib/kernel/qmetatype.h b/src/corelib/kernel/qmetatype.h
index 9c1fdeecdd4..e3ef1474dac 100644
--- a/src/corelib/kernel/qmetatype.h
+++ b/src/corelib/kernel/qmetatype.h
@@ -92,6 +92,12 @@ inline constexpr int qMetaTypeId();
 #else
 #  define QT_FOR_EACH_STATIC_REGULAR_EXPRESSION(F)
 #endif
+#ifndef QT_NO_VARIANT
+#  define QT_FOR_EACH_STATIC_QVARIANT(F) \
+    F(QVariant, 41, QVariant)
+#else
+#  define QT_FOR_EACH_STATIC_QVARIANT(F)
+#endif
 
 #define QT_FOR_EACH_STATIC_CORE_CLASS(F)\
     F(QChar, 7, QChar) \
@@ -113,7 +119,7 @@ inline constexpr int qMetaTypeId();
     F(QPointF, 26, QPointF) \
     QT_FOR_EACH_STATIC_EASINGCURVE(F) \
     F(QUuid, 30, QUuid) \
-    F(QVariant, 41, QVariant) \
+    QT_FOR_EACH_STATIC_QVARIANT(F) \
     QT_FOR_EACH_STATIC_REGULAR_EXPRESSION(F) \
     F(QJsonValue, 45, QJsonValue) \
     F(QJsonObject, 46, QJsonObject) \
@@ -128,13 +134,20 @@ inline constexpr int qMetaTypeId();
 #define QT_FOR_EACH_STATIC_CORE_POINTER(F)\
     F(QObjectStar, 39, QObject*)
 
-#define QT_FOR_EACH_STATIC_CORE_TEMPLATE(F)\
+#ifndef QT_NO_VARIANT
+#  define QT_FOR_EACH_STATIC_CORE_TEMPLATE(F)\
     F(QVariantMap, 8, QVariantMap) \
     F(QVariantList, 9, QVariantList) \
     F(QVariantHash, 28, QVariantHash) \
     F(QVariantPair, 58, QVariantPair) \
     F(QByteArrayList, 49, QByteArrayList) \
     F(QStringList, 11, QStringList) \
+    /**/
+#else
+#  define QT_FOR_EACH_STATIC_CORE_TEMPLATE(F)\
+    F(QByteArrayList, 49, QByteArrayList) \
+    F(QStringList, 11, QStringList)
+#endif
 
 #if QT_CONFIG(shortcut)
 #define QT_FOR_EACH_STATIC_KEYSEQUENCE_CLASS(F)\
@@ -188,12 +201,20 @@ inline constexpr int qMetaTypeId();
     F(UInt, -1, uint, "quint32") \
     F(LongLong, -1, qlonglong, "qint64") \
     F(ULongLong, -1, qulonglong, "quint64") \
+    F(QByteArrayList, -1, QByteArrayList, "QList<QByteArray>") \
+    F(QStringList, -1, QStringList, "QList<QString>") \
+    QT_FOR_EACH_STATIC_VARIANT_ALIAS_TYPE(F)
+
+#ifndef QT_NO_VARIANT
+#define QT_FOR_EACH_STATIC_VARIANT_ALIAS_TYPE(F) \
     F(QVariantList, -1, QVariantList, "QList<QVariant>") \
     F(QVariantMap, -1, QVariantMap, "QMap<QString,QVariant>") \
     F(QVariantHash, -1, QVariantHash, "QHash<QString,QVariant>") \
     F(QVariantPair, -1, QVariantPair, "QPair<QVariant,QVariant>") \
-    F(QByteArrayList, -1, QByteArrayList, "QList<QByteArray>") \
-    F(QStringList, -1, QStringList, "QList<QString>") \
+    /**/
+#else
+#define QT_FOR_EACH_STATIC_VARIANT_ALIAS_TYPE(F)
+#endif
 
 #define QT_FOR_EACH_STATIC_TYPE(F)\
     QT_FOR_EACH_STATIC_PRIMITIVE_TYPE(F)\
diff --git a/src/corelib/kernel/qvariant.h b/src/corelib/kernel/qvariant.h
index 9f0edf4233b..d567bcbb7c5 100644
--- a/src/corelib/kernel/qvariant.h
+++ b/src/corelib/kernel/qvariant.h
@@ -796,14 +796,16 @@ template<typename T> inline T qvariant_cast(QVariant &&v)
     return t;
 }
 
+#  ifndef QT_NO_VARIANT
 template<> inline QVariant qvariant_cast<QVariant>(const QVariant &v)
 {
     if (v.metaType().id() == QMetaType::QVariant)
         return *reinterpret_cast<const QVariant *>(v.constData());
     return v;
 }
+#  endif
 
-#endif
+#endif // QT_MOC
 
 #ifndef QT_NO_DEBUG_STREAM
 #if QT_DEPRECATED_SINCE(6, 0)
diff --git a/src/corelib/serialization/qjsonarray.cpp b/src/corelib/serialization/qjsonarray.cpp
index 517ac116a6d..2a660680b94 100644
--- a/src/corelib/serialization/qjsonarray.cpp
+++ b/src/corelib/serialization/qjsonarray.cpp
@@ -211,6 +211,7 @@ QJsonArray QJsonArray::fromStringList(const QStringList &list)
     return array;
 }
 
+#ifndef QT_NO_VARIANT
 /*!
     Converts the variant list \a list to a QJsonArray.
 
@@ -235,6 +236,7 @@ QVariantList QJsonArray::toVariantList() const
 {
     return QCborArray::fromJsonArray(*this).toVariantList();
 }
+#endif // !QT_NO_VARIANT
 
 
 /*!
diff --git a/src/corelib/serialization/qjsoncbor.cpp b/src/corelib/serialization/qjsoncbor.cpp
index ad0e95061c8..da07eca8a7f 100644
--- a/src/corelib/serialization/qjsoncbor.cpp
+++ b/src/corelib/serialization/qjsoncbor.cpp
@@ -421,11 +421,13 @@ QJsonArray QCborArray::toJsonArray() const
     return convertToJsonArray(d.data());
 }
 
+#ifndef QT_NO_VARIANT
 QJsonArray QJsonPrivate::Variant::toJsonArray(const QVariantList &list)
 {
     const auto cborArray = QCborArray::fromVariantList(list);
     return convertToJsonArray(cborArray.d.data(), ConversionMode::FromVariantToJson);
 }
+#endif // !QT_NO_VARIANT
 
 /*!
     Recursively converts every \l QCborValue value in this map to JSON using
@@ -469,6 +471,7 @@ QJsonObject QCborMap::toJsonObject() const
     return convertToJsonObject(d.data());
 }
 
+#ifndef QT_NO_VARIANT
 QJsonObject QJsonPrivate::Variant::toJsonObject(const QVariantMap &map)
 {
     const auto cborMap = QCborMap::fromVariantMap(map);
@@ -578,6 +581,7 @@ QVariant QCborValue::toVariant() const
 
     Q_UNREACHABLE_RETURN(QVariant());
 }
+#endif // !QT_NO_VARIANT
 
 /*!
     Converts the JSON value contained in \a v into its corresponding CBOR value
@@ -631,6 +635,7 @@ QCborValue QCborValue::fromJsonValue(const QJsonValue &v)
     return QCborValue();
 }
 
+#ifndef QT_NO_VARIANT
 static void appendVariant(QCborContainerPrivate *d, const QVariant &variant)
 {
     // Handle strings and byte arrays directly, to avoid creating a temporary
@@ -831,6 +836,7 @@ QCborArray QCborArray::fromVariantList(const QVariantList &list)
         appendVariant(a.d.data(), v);
     return a;
 }
+#endif // !QT_NO_VARIANT
 
 /*!
     Converts all JSON items found in the \a array array to CBOR using
@@ -862,6 +868,7 @@ QCborArray QCborArray::fromJsonArray(QJsonArray &&array) noexcept
 
 }
 
+#ifndef QT_NO_VARIANT
 /*!
     Converts the CBOR values to QVariant using QCborValue::toVariant() and
     "stringifies" all the CBOR keys in this map, returning the QVariantMap that
@@ -958,6 +965,7 @@ QCborMap QCborMap::fromVariantHash(const QVariantHash &hash)
     }
     return m;
 }
+#endif // !QT_NO_VARIANT
 
 /*!
     Converts all JSON items found in the \a obj object to CBOR using
diff --git a/src/corelib/serialization/qjsondocument.cpp b/src/corelib/serialization/qjsondocument.cpp
index ac4ae4876d7..ae0197bd2a4 100644
--- a/src/corelib/serialization/qjsondocument.cpp
+++ b/src/corelib/serialization/qjsondocument.cpp
@@ -181,6 +181,7 @@ QJsonDocument &QJsonDocument::operator =(const QJsonDocument &other)
     Swaps the document \a other with this. This operation is very fast and never fails.
 */
 
+#ifndef QT_NO_VARIANT
 /*!
  Creates a QJsonDocument from the QVariant \a variant.
 
@@ -231,6 +232,7 @@ QVariant QJsonDocument::toVariant() const
         return QJsonArray(container).toVariantList();
     return QJsonObject(container).toVariantMap();
 }
+#endif // !QT_NO_VARIANT
 
 /*!
     \enum QJsonDocument::JsonFormat
diff --git a/src/corelib/serialization/qjsonobject.cpp b/src/corelib/serialization/qjsonobject.cpp
index 77bcba01f8c..fb81599e33a 100644
--- a/src/corelib/serialization/qjsonobject.cpp
+++ b/src/corelib/serialization/qjsonobject.cpp
@@ -156,7 +156,7 @@ QJsonObject &QJsonObject::operator =(const QJsonObject &other) noexcept = defaul
     Swaps the object \a other with this. This operation is very fast and never fails.
 */
 
-
+#ifndef QT_NO_VARIANT
 /*!
     Converts the variant map \a map to a QJsonObject.
 
@@ -219,6 +219,7 @@ QVariantHash QJsonObject::toVariantHash() const
 {
     return QCborMap::fromJsonObject(*this).toVariantHash();
 }
+#endif // !QT_NO_VARIANT
 
 /*!
     Returns a list of all keys in this object.
diff --git a/src/corelib/serialization/qjsonvalue.cpp b/src/corelib/serialization/qjsonvalue.cpp
index 29da9058f20..2d114b90721 100644
--- a/src/corelib/serialization/qjsonvalue.cpp
+++ b/src/corelib/serialization/qjsonvalue.cpp
@@ -345,6 +345,7 @@ void QJsonValue::swap(QJsonValue &other) noexcept
     error cases as e.g. accessing a non existing key in a QJsonObject.
  */
 
+#ifndef QT_NO_VARIANT
 /*!
     Converts \a variant to a QJsonValue and returns it.
 
@@ -587,6 +588,7 @@ QVariant QJsonValue::toVariant() const
                     error condition, when trying to read an out of bounds value
                     in an array or a non existent key in an object.
 */
+#endif // !QT_NO_VARIANT
 
 /*!
     Returns the type of the value.
@@ -936,10 +938,12 @@ QJsonValueRef &QJsonValueRef::operator =(const QJsonValueRef &ref)
     return assignToRef(*this, d->valueAt(index), is_object);
 }
 
+#ifndef QT_NO_VARIANT
 QVariant QJsonValueConstRef::toVariant() const
 {
     return concrete(*this).toVariant();
 }
+#endif // !QT_NO_VARIANT
 
 QJsonArray QJsonValueConstRef::toArray() const
 {
diff --git a/src/tools/bootstrap/CMakeLists.txt b/src/tools/bootstrap/CMakeLists.txt
index a3babd89aa8..673c1f70bfb 100644
--- a/src/tools/bootstrap/CMakeLists.txt
+++ b/src/tools/bootstrap/CMakeLists.txt
@@ -46,7 +46,6 @@ qt_internal_extend_target(Bootstrap
         ../../corelib/kernel/qmetacontainer.cpp
         ../../corelib/kernel/qmetatype.cpp
         ../../corelib/kernel/qsystemerror.cpp
-        ../../corelib/kernel/qvariant.cpp
         ../../corelib/plugin/quuid.cpp
         ../../corelib/serialization/qcborcommon.cpp
         ../../corelib/serialization/qcborstreamwriter.cpp