Convert features.errormessage to QT_[REQUIRE_]CONFIG

Change-Id: I9cc4f5190108c4bb96ddbd782ef1a031c9889f7e
Reviewed-by: Oswald Buddenhagen <oswald.buddenhagen@qt.io>

src/widgets/dialogs/dialogs.pri

@@ -2,7 +2,6 @@
 
 HEADERS += \
         dialogs/qfscompleter_p.h \
-	dialogs/qerrormessage.h \
 	dialogs/qfontdialog.h \
 	dialogs/qfontdialog_p.h \
         dialogs/qfilesystemmodel.h \
@@ -11,7 +10,6 @@ HEADERS += \
 
 INCLUDEPATH += $$PWD
 SOURCES += \
-	dialogs/qerrormessage.cpp \
 	dialogs/qfontdialog.cpp \
         dialogs/qfilesystemmodel.cpp \
         dialogs/qfileinfogatherer.cpp
@@ -30,6 +28,11 @@ qtConfig(dialog) {
         dialogs/qdialog.cpp
 }
 
+qtConfig(errormessage) {
+    HEADERS += dialogs/qerrormessage.h
+    SOURCES += dialogs/qerrormessage.cpp
+}
+
 qtConfig(filedialog) {
     HEADERS += \
         dialogs/qfiledialog.h \

src/widgets/dialogs/qdialog.cpp

@@ -59,7 +59,9 @@
 #if QT_CONFIG(messagebox)
 #include "qmessagebox.h"
 #endif
+#if QT_CONFIG(errormessage)
 #include "qerrormessage.h"
+#endif
 #include <qpa/qplatformtheme.h>
 #include "private/qdialog_p.h"
 #include "private/qguiapplication_p.h"
@@ -87,7 +89,7 @@ static inline int themeDialogType(const QDialog *dialog)
     if (qobject_cast<const QMessageBox *>(dialog))
         return QPlatformTheme::MessageDialog;
 #endif
-#ifndef QT_NO_ERRORMESSAGE
+#if QT_CONFIG(errormessage)
     if (qobject_cast<const QErrorMessage *>(dialog))
         return QPlatformTheme::MessageDialog;
 #endif

src/widgets/dialogs/qerrormessage.cpp

@@ -39,8 +39,6 @@
 
 #include "qerrormessage.h"
 
-#ifndef QT_NO_ERRORMESSAGE
-
 #include "qapplication.h"
 #include "qcheckbox.h"
 #include "qlabel.h"
@@ -392,5 +390,3 @@ void QErrorMessagePrivate::retranslateStrings()
 QT_END_NAMESPACE
 
 #include "moc_qerrormessage.cpp"
-
-#endif // QT_NO_ERRORMESSAGE

src/widgets/dialogs/qerrormessage.h

@@ -42,12 +42,11 @@
 
 #include <QtWidgets/qtwidgetsglobal.h>
 
-#ifndef QT_NO_ERRORMESSAGE
-
 #include <QtWidgets/qdialog.h>
 
-QT_BEGIN_NAMESPACE
+QT_REQUIRE_CONFIG(errormessage);
 
+QT_BEGIN_NAMESPACE
 
 class QErrorMessagePrivate;
 
@@ -75,6 +74,4 @@ private:
 
 QT_END_NAMESPACE
 
-#endif // QT_NO_ERRORMESSAGE
-
 #endif // QERRORMESSAGE_H