Fix BUILD_RTI=OFF build: Guard RTI-only DDS modules

- LtsUtilsSettings: Fix export header include path (angle brackets)
- LtsWidgets: Move LtsUtilsSettings to PUBLIC link libraries
- BatteryNotification: Remove unused QDesktopWidget include
- DDS/FTC: Wrap ddsftccore library in IF(BUILD_RTI) guards
- DDS/FTS: Remove ELSE block, wrap entire library in IF(BUILD_RTI)
- DDS/DTC: Wrap entire library definition in IF(BUILD_RTI)
- DDS/DTS: Wrap entire library definition in IF(BUILD_RTI)
- DDS/DDSConnector: Wrap entire library in IF(BUILD_RTI), remove ELSE
- DDS/Routing: Wrap entire library in IF(BUILD_RTI)

All RTI Connext DDS-specific libraries (ddscore, ddsQoS, ddsgen,
ddsdtc, ddsdts, ddsfts, ddsconnector, routing_plugin) are now
properly guarded so BUILD_RTI=OFF builds can succeed.

qt6-after/qt6-migrated-legatus/Lts/DDS/FTC/CMakeLists.txt

@@ -11,20 +11,6 @@ TARGET_INCLUDE_DIRECTORIES(ddsftc
   INTERFACE
   ${CMAKE_CURRENT_SOURCE_DIR}/../../
 )
-IF(BUILD_RTI)
-TARGET_LINK_LIBRARIES(ddsftc
-  INTERFACE
-    Qt6::Core
-    ddsfts_connext
-    ddscore # due to the usage of Core::FtReplyState inside generic_ftc_impl.h, only on core.hpp - fixme :/
-    ddsgen
-    ddsQoS
-    RTI::nddsc
-    RTI::nddscpp2
-    ddsftccore
-    LtsUtilsCoreHeaderOnly
-)
-ELSE()
 TARGET_LINK_LIBRARIES(ddsftc
   INTERFACE
     Qt6::Core
@@ -34,6 +20,13 @@ TARGET_LINK_LIBRARIES(ddsftc
     ddsftccore
     LtsUtilsCoreHeaderOnly
 )
+IF(BUILD_RTI)
+TARGET_LINK_LIBRARIES(ddsftc
+  INTERFACE
+    ddsfts_connext
+    RTI::nddsc
+    RTI::nddscpp2
+)
 ENDIF()
 SET(SRCS
   ${CMAKE_CURRENT_SOURCE_DIR}/generic_ftc.h
@@ -47,16 +40,19 @@ TARGET_SOURCES(ddsftc INTERFACE ${SRCS})
 
 
 # ddsftccore
+IF(BUILD_RTI)
 NGL_ADD_LIBRARY2(WS SV HLA ddsftccore SHARED abstract_requester.h abstract_requester.cpp)
 NGL_TARGET_INCLUDE_DIRECTORIES(ddsftccore
   PUBLIC
     ${CMAKE_CURRENT_SOURCE_DIR}/../../ # 'DDS/FTC/...' reads better than only FTC
 )
-IF(BUILD_RTI)
 NGL_TARGET_LINK_LIBRARIES(ddsftccore
   PUBLIC
      Qt6::Core
      ddscore
+     ddsfts_connext
+     RTI::nddsc
+     RTI::nddscpp2
 )
-ENDIF(BUILD_RTI)
 NGL_INSTALL_TARGET(ddsftccore)
+ENDIF(BUILD_RTI)