qErrnoWarning: disable when QT_NO_WARNING_OUTPUT is set

Change-Id: Ife98ce915b4bd3edd017fffd18c8bb775381e6f4
Reviewed-by: Ahmad Samir <a.samirh78@gmail.com>

src/corelib/compat/removed_api.cpp

@@ -1367,3 +1367,19 @@ QUuid::Version QUuid::version() const noexcept
 // order sections alphabetically to reduce chances of merge conflicts
 
 #endif // QT_CORE_REMOVED_SINCE(6, 9)
+
+#if QT_CORE_REMOVED_SINCE(6, 10)
+
+#include "qlogging.h"
+
+QNoDebug QMessageLogger::noDebug() const noexcept
+{
+    return QNoDebug();
+}
+
+
+// #include "qotherheader.h"
+// // implement removed functions from qotherheader.h
+// order sections alphabetically to reduce chances of merge conflicts
+
+#endif // QT_CORE_REMOVED_SINCE(6, 10)

src/corelib/global/qlogging.cpp

@@ -515,19 +515,6 @@ QDebug QMessageLogger::debug(QMessageLogger::CategoryFunction catFunc) const
 {
     return debug((*catFunc)());
 }
-
-/*!
-    \internal
-
-    Returns a QNoDebug object, which is used to ignore debugging output.
-
-    \sa QNoDebug, qDebug()
-*/
-QNoDebug QMessageLogger::noDebug() const noexcept
-{
-    return QNoDebug();
-}
-
 #endif
 
 /*!

src/corelib/global/qlogging.h

@@ -134,10 +134,13 @@ public:
     QDebug fatal(const QLoggingCategory &cat) const;
     Q_DECL_COLD_FUNCTION
     QDebug fatal(CategoryFunction catFunc) const;
-
-    QNoDebug noDebug() const noexcept;
 #endif // QT_NO_DEBUG_STREAM
 
+#  if QT_CORE_REMOVED_SINCE(6, 10)
+    QNoDebug noDebug() const noexcept;
+#  endif
+    inline QNoDebug noDebug(...) const noexcept;    // in qdebug.h
+
 private:
     QMessageLogContext context;
 };
@@ -168,6 +171,9 @@ private:
 #define qCritical QMessageLogger(QT_MESSAGELOG_FILE, QT_MESSAGELOG_LINE, QT_MESSAGELOG_FUNC).critical
 #define qFatal QMessageLogger(QT_MESSAGELOG_FILE, QT_MESSAGELOG_LINE, QT_MESSAGELOG_FUNC).fatal
 
+Q_CORE_EXPORT Q_DECL_COLD_FUNCTION void qErrnoWarning(int code, const char *msg, ...);
+Q_CORE_EXPORT Q_DECL_COLD_FUNCTION void qErrnoWarning(const char *msg, ...);
+
 #define QT_NO_QDEBUG_MACRO while (false) QMessageLogger().noDebug
 
 #if defined(QT_NO_DEBUG_OUTPUT)
@@ -181,14 +187,12 @@ private:
 #if defined(QT_NO_WARNING_OUTPUT)
 #  undef qWarning
 #  define qWarning QT_NO_QDEBUG_MACRO
+#  define qErrnoWarning QT_NO_QDEBUG_MACRO
 #endif
 
 Q_CORE_EXPORT void qt_message_output(QtMsgType, const QMessageLogContext &context,
                                      const QString &message);
 
-Q_CORE_EXPORT Q_DECL_COLD_FUNCTION void qErrnoWarning(int code, const char *msg, ...);
-Q_CORE_EXPORT Q_DECL_COLD_FUNCTION void qErrnoWarning(const char *msg, ...);
-
 typedef void (*QtMessageHandler)(QtMsgType, const QMessageLogContext &, const QString &);
 Q_CORE_EXPORT QtMessageHandler qInstallMessageHandler(QtMessageHandler);
 

src/corelib/io/qdebug.h

@@ -352,6 +352,8 @@ public:
     template<typename T>
     inline QNoDebug &operator<<(const T &) { return *this; }
 };
+inline QNoDebug QMessageLogger::noDebug(...) const noexcept
+{ return {}; }
 
 inline QDebug &QDebug::operator=(const QDebug &other)
 {