QMessageBox: Remove include of qdebug.h

Move the implementation qRequireVersion() to prevent having
to include qdebug.h which pulls in many other headers.

Amends b5d874e36fd39fa6e57ff27db27ae0b029949749.

Fix missing include introduced by
3a553507a134bee1562d34ebbf786a053d36fc05.

Pick-to: 6.6
Task-number: QTBUG-114214
Task-number: QTBUG-97601
Change-Id: Iba68ffca95061666d9458ffa5700d07c7669da5b
Reviewed-by: Axel Spoerl <axel.spoerl@qt.io>
Reviewed-by: Qt CI Bot <qt_ci_bot@qt-project.org>

2 files changed, 25 insertions, 17 deletions

diff --git a/src/widgets/dialogs/qmessagebox.cpp b/src/widgets/dialogs/qmessagebox.cpp
index 58e846b16b..dde15fbaf3 100644
--- a/src/widgets/dialogs/qmessagebox.cpp
+++ b/src/widgets/dialogs/qmessagebox.cpp
@@ -30,11 +30,17 @@
 #include "private/qabstractbutton_p.h"
 #include <QtGui/qpa/qplatformtheme.h>
 
+#include <QtCore/qanystringview.h>
+#include <QtCore/qdebug.h>
+#include <QtCore/qversionnumber.h>
+
 #ifdef Q_OS_WIN
 #    include <QtCore/qt_windows.h>
 #include <qpa/qplatformnativeinterface.h>
 #endif
 
+#include <memory>
+
 QT_BEGIN_NAMESPACE
 
 using namespace Qt::StringLiterals;
@@ -2841,6 +2847,22 @@ void QMessageBoxPrivate::helperDone(QDialog::DialogCode code, QPlatformDialogHel
         clickedButton = button;
 }
 
+Q_WIDGETS_EXPORT void _q_requireVersion(int argc, char *argv[], QAnyStringView req)
+{
+    const auto required = QVersionNumber::fromString(req).normalized();
+    const auto current = QVersionNumber::fromString(qVersion()).normalized();
+    if (current >= required)
+        return;
+    std::unique_ptr<QApplication> application;
+    if (!qApp)
+        application = std::make_unique<QApplication>(argc, argv);
+    const QString message = QApplication::tr("Application \"%1\" requires Qt %2, found Qt %3.")
+                                    .arg(qAppName(), required.toString(), current.toString());
+    QMessageBox::critical(nullptr, QApplication::tr("Incompatible Qt Library Error"),
+                          message, QMessageBox::Abort);
+    qFatal("%s", qPrintable(message));
+}
+
 #if QT_DEPRECATED_SINCE(6,2)
 /*!
     \deprecated
diff --git a/src/widgets/dialogs/qmessagebox.h b/src/widgets/dialogs/qmessagebox.h
index 161719e180..2dee2e9204 100644
--- a/src/widgets/dialogs/qmessagebox.h
+++ b/src/widgets/dialogs/qmessagebox.h
@@ -5,17 +5,13 @@
 #define QMESSAGEBOX_H
 
 #include <QtWidgets/qtwidgetsglobal.h>
-#include <QtWidgets/qapplication.h>
 #include <QtWidgets/qdialog.h>
 
-#include <QtCore/qanystringview.h>
-#include <QtCore/qdebug.h>
-#include <QtCore/qversionnumber.h>
-
 QT_REQUIRE_CONFIG(messagebox);
 
 QT_BEGIN_NAMESPACE
 
+class QAnyStringView;
 class QLabel;
 class QMessageBoxPrivate;
 class QAbstractButton;
@@ -319,18 +315,8 @@ Q_DECLARE_OPERATORS_FOR_FLAGS(QMessageBox::StandardButtons)
 [[maybe_unused]]
 static inline void qRequireVersion(int argc, char *argv[], QAnyStringView req)
 {
-    const auto required = QVersionNumber::fromString(req).normalized();
-    const auto current = QVersionNumber::fromString(qVersion()).normalized();
-    if (current >= required)
-        return;
-    std::unique_ptr<QApplication> application;
-    if (!qApp)
-        application = std::make_unique<QApplication>(argc, argv);
-    const QString message = QApplication::tr("Application \"%1\" requires Qt %2, found Qt %3.")
-                                             .arg(qAppName(), required.toString(), current.toString());
-    QMessageBox::critical(nullptr, QApplication::tr("Incompatible Qt Library Error"),
-                          message, QMessageBox::Abort);
-    qFatal().noquote() << message;
+    Q_WIDGETS_EXPORT void _q_requireVersion(int, char *[], QAnyStringView);
+    _q_requireVersion(argc, argv, req);
 }
 
 #define QT_REQUIRE_VERSION(argc, argv, str) qRequireVersion(argc, argv, str);