fix linking issue

Author: sawenzel

macro/CMakeLists.txt

@@ -125,6 +125,7 @@ endif()
 o2_add_test_root_macro(build_geometry.C
                        PUBLIC_LINK_LIBRARIES O2::SimConfig
                                              O2::DetectorsPassive
+                                             O2::ExternalDetectors
                                              O2::Field
                                              O2::MFTSimulation
                                              O2::MCHSimulation
@@ -184,6 +185,7 @@ if(Geant4_FOUND AND BUILD_SIMULATION)
 o2_add_test_root_macro(o2sim.C
                        PUBLIC_LINK_LIBRARIES O2::Generators
                                              O2::DetectorsPassive
+                                             O2::ExternalDetectors
                                              O2::Field
                                              O2::MFTSimulation
                                              O2::MCHSimulation

macro/build_geometry.C

@@ -38,6 +38,7 @@
 #include <CPVSimulation/Detector.h>
 #include <ZDCSimulation/Detector.h>
 #include <FOCALSimulation/Detector.h>
+#include <ExternalDetectors/ExternalDetector.h>
 #include <DetectorsPassive/Cave.h>
 #include <DetectorsPassive/FrameStructure.h>
 #include <SimConfig/SimConfig.h>
@@ -64,7 +65,6 @@
 #endif
 
 #include <DetectorsPassive/ExternalModule.h>
-#include <ExternalDetectors/ExternalDetector.h>
 
 using Return = o2::base::Detector*;