fixed #12056 - qt.cfg: implemented Q_OBJECT to get rid of symbolDatabaseWarning in selfcheck (#5533)

Author: firewave

.selfcheck_suppressions

@@ -4,14 +4,12 @@ bitwiseOnBoolean
 
 # temporary suppressions - fix the warnings!
 simplifyUsing:lib/valueptr.h
+simplifyUsing:gui/temp/moc_*.cpp
 varid0:gui/projectfile.cpp
 templateInstantiation
 
 # warnings in Qt generated code we cannot fix
-symbolDatabaseWarning:gui/temp/moc_*.cpp
-simplifyUsing:gui/temp/moc_*.cpp
 funcArgNamesDifferent:gui/temp/moc_*.cpp
-symbolDatabaseWarning:tools/triage/temp/moc_*.cpp
 naming-varname:gui/temp/ui_*.h
 naming-varname:cmake.output/gui/ui_*.h
 functionStatic:gui/temp/ui_fileview.h

.selfcheck_unused_suppressions

@@ -9,4 +9,7 @@ unusedFunction:gui/codeeditor.*
 # usage is disabled
 unusedFunction:lib/symboldatabase.cpp
 # false positive - #10661
-unusedFunction:oss-fuzz/main.cpp
+unusedFunction:oss-fuzz/main.cpp
+
+# Q_OBJECT functions which are not called in our code
+unusedFunction:cmake.output.notest/gui/cppcheck-gui_autogen/*/moc_aboutdialog.cpp

cfg/qt.cfg

@@ -5081,7 +5081,7 @@
   <define name="Q_LIKELY(expr)" value="expr"/>
   <define name="Q_NAMESPACE" value=""/>
   <define name="Q_NULLPTR" value="NULL"/>
-  <define name="Q_OBJECT" value=""/>
+  <define name="Q_OBJECT" value="static void qt_static_metacall(QObject*,QMetaObject::Call,int,void**);const MetaObject* metaObject() const;void* qt_metacast(const char*);int qt_metacall(QMetaObject::Call,int,void**);"/>
   <define name="Q_PRIVATE_SLOT(d, signature)" value=""/>
   <define name="Q_SLOTS" value=""/>
   <!-- Treat as variadic macro to avoid preprocessorErrorDirective -->