QtCore: compile with QT_DISABLE_DEPRECATED_BEFORE=0x050d00

Don't call or implement functions which are not available when compiling
with QT_DISABLE_DEPRECATED_BEFORE=0x050d00

Change-Id: I949b12bba880c516391f312f58c8748303a1790d
Reviewed-by: Lars Knoll <lars.knoll@qt.io>
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>

src/corelib/io/qprocess.cpp

@@ -998,7 +998,12 @@ void QProcessPrivate::setErrorAndEmit(QProcess::ProcessError error, const QStrin
     Q_ASSERT(error != QProcess::UnknownError);
     setError(error, description);
     emit q->errorOccurred(processError);
+#if QT_DEPRECATED_SINCE(5, 6)
+QT_WARNING_PUSH
+QT_WARNING_DISABLE_DEPRECATED
     emit q->error(processError);
+QT_WARNING_POP
+#endif
 }
 
 /*!

src/corelib/kernel/qcoreapplication.cpp

@@ -1013,6 +1013,7 @@ void QCoreApplication::setQuitLockEnabled(bool enabled)
     quitLockRefEnabled = enabled;
 }
 
+#if QT_DEPRECATED_SINCE(5, 6)
 /*!
   \internal
   \deprecated
@@ -1024,6 +1025,7 @@ bool QCoreApplication::notifyInternal(QObject *receiver, QEvent *event)
 {
     return notifyInternal2(receiver, event);
 }
+#endif
 
 /*!
   \internal

src/corelib/kernel/qsignalmapper.cpp

@@ -37,6 +37,9 @@
 **
 ****************************************************************************/
 
+#include "qglobal.h"
+#if QT_DEPRECATED_SINCE(5, 10)
+
 #include "qsignalmapper.h"
 #include "qhash.h"
 #include "qobject_p.h"
@@ -312,3 +315,4 @@ QT_END_NAMESPACE
 
 #include "moc_qsignalmapper.cpp"
 
+#endif