From 528092d80bc6835efaf9a7b75e4da74f27ac4850 Mon Sep 17 00:00:00 2001
From: Ivana Hrivnacova <Ivana.Hrivnacova@cern.ch>
Date: Thu, 28 Nov 2024 12:30:48 +0100
Subject: [PATCH] Fix compilation with -DGeant4VMC_USE_G4Root=OFF: (#69)

Added compilation flag for unprotected use of G4Root in TG4GeometryManager

Bug: https://bugs.gentoo.org/943657
Bug: https://github.com/vmc-project/geant4_vmc/issues/68
---
 source/geometry/src/TG4GeometryManager.cxx | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/source/geometry/src/TG4GeometryManager.cxx b/source/geometry/src/TG4GeometryManager.cxx
index 02751e8458..d8d9db65ec 100644
--- a/source/geometry/src/TG4GeometryManager.cxx
+++ b/source/geometry/src/TG4GeometryManager.cxx
@@ -29,12 +29,15 @@
 #include "TG4ModelConfigurationManager.h"
 #include "TG4OpGeometryManager.h"
 #include "TG4RadiatorDescription.h"
-#include "TG4RootDetectorConstruction.h"
 #include "TG4SDManager.h"
 #include "TG4StateManager.h"
 #include "TG4VUserPostDetConstruction.h"
 #include "TG4VUserRegionConstruction.h"
 
+#ifdef USE_G4ROOT
+#include "TG4RootDetectorConstruction.h"
+#endif
+
 #include <G4FieldManager.hh>
 #include <G4LogicalVolumeStore.hh>
 #include <G4Material.hh>
@@ -521,7 +524,9 @@ void TG4GeometryManager::FillMediumMapFromRoot()
       geoVolume = gGeoManager->GetVolume(volName.data());
     }
     else {
+#ifdef USE_G4ROOT
       geoVolume = fRootDetectorConstruction->GetVolume(lv);
+#endif
     }
 
     if (!geoVolume) {