Migration of Legatus codebase to Qt6 with RTI Connext DDS 7.7 integration is partially complete. Core DDS targets build successfully, but ProjectDataManagement module blocks full ddsfts compilation due to IDL definition conflicts.

qt6-after/qt6-migrated-legatus/Lts/Common/CodeGen/svc_db_structs.cpp.grantlee

@@ -30,6 +30,23 @@ QString fixupEmptyJsonString(const QString &str)
   return str.isEmpty() ? QStringLiteral("{}") : str;
 }
 
+// Basic type toJson overloads
+QJsonValue toJson(int val)
+{
+  return QJsonValue(val);
+}
+QJsonValue toJson(double val)
+{
+  return QJsonValue(val);
+}
+QJsonValue toJson(qint64 val)
+{
+  return QJsonValue(QString::number(val));
+}
+QJsonValue toJson(const std::string &val)
+{
+  return QJsonValue(QString::fromStdString(val));
+}
 
 // QPointF
 QJsonValue toJson(const QPointF &element)