Behebt strikt nur die verbleibenden CMake legacy command Fehler im Docker-Build der Qt6-Migration.

qt6-after/qt6-migrated-legatus/cmake/NGLMacros.cmake

@@ -33,6 +33,11 @@
 
 INCLUDE(GenerateExportHeader)
 
+# Suppress CMP0177 warning: install() DESTINATION normalization
+if(POLICY CMP0177)
+  cmake_policy(SET CMP0177 OLD)
+endif()
+
 # Compatibility stubs for Qt5 CMake macros when Qt6 is used.
 # These stubs allow configure to succeed; actual resource/ui generation should be addressed during source migration.
 if(NOT COMMAND QT5_ADD_RESOURCES)