qml{plugindump|importscanner}: Don't mix std::cerr and std::wcerr

Apparently that causes output to be suppressed.

Pick-to: 6.3 6.2 5.15
Fixes: QTBUG-99400
Change-Id: I4ac6a66a10c7d2c27dfc1efa6d52afa60bdc58d6
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@qt.io>
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@qt.io>
Reviewed-by: Volker Hilsheimer <volker.hilsheimer@qt.io>

tools/qmlimportscanner/main.cpp

@@ -79,14 +79,14 @@ inline QString preferLiteral() { return QStringLiteral("prefer"); }
 
 void printUsage(const QString &appNameIn)
 {
-    const std::wstring appName = appNameIn.toStdWString();
+    const std::string appName = appNameIn.toStdString();
     const QString qmlPath = QLibraryInfo::path(QLibraryInfo::QmlImportsPath);
-    std::wcerr
+    std::cerr
         << "Usage: " << appName << " -rootPath path/to/app/qml/directory -importPath path/to/qt/qml/directory\n"
            "       " << appName << " -qmlFiles file1 file2 -importPath path/to/qt/qml/directory\n"
            "       " << appName << " -qrcFiles file1.qrc file2.qrc -importPath path/to/qt/qml/directory\n\n"
            "Example: " << appName << " -rootPath . -importPath "
-        << QDir::toNativeSeparators(qmlPath).toStdWString()
+        << QDir::toNativeSeparators(qmlPath).toStdString()
         << '\n';
 }
 

tools/qmlplugindump/main.cpp

@@ -991,19 +991,9 @@ void compactDependencies(QStringList *dependencies)
     }
 }
 
-inline std::wostream &operator<<(std::wostream &str, const QString &s)
-{
-#ifdef Q_OS_WIN
-    str << reinterpret_cast<const wchar_t *>(s.utf16());
-#else
-    str << s.toStdWString();
-#endif
-    return str;
-}
-
 void printDebugMessage(QtMsgType, const QMessageLogContext &, const QString &msg)
 {
-    std::wcerr << msg << std::endl;
+    std::cerr << msg.toStdString() << std::endl;
     // In case of QtFatalMsg the calling code will abort() when appropriate.
 }