Release of v104r3

Notes and dependencies for v104r3 release.

Geant4/G4config/CMakeLists.txt

@@ -30,7 +30,7 @@ if (NOT GEANT4_TAG)
   elseif(CMAKE_PROJECT_VERSION STREQUAL "HEAD")
     # Special mapping of version HEAD
     # WARNING this must be kept up to date manually
-    set(GEANT4_TAG "lhcb/v10.4.2-branch")
+    set(GEANT4_TAG "lhcb/v10.4.3-branch")
   else()
     set(GEANT4_TAG lhcb/${CMAKE_PROJECT_VERSION})
   endif()
@@ -38,6 +38,8 @@ endif()
 
 set(GEANT4_TAG ${GEANT4_TAG} CACHE STRING "Tag of Geant4 to get from the Geant4-srcs repository")
 
+set(OpenGL_GL_PREFERENCE "GLVND" CACHE STRING "Preferred GL library to use (see https://cmake.org/cmake/help/v3.12/policy/CMP0072.html)")
+
 include(ExternalProject)
 
 ExternalProject_Add(Geant4
@@ -64,6 +66,7 @@ ExternalProject_Add(Geant4
 #             -DLCG_USE_NATIVE_COMPILER=${LCG_USE_NATIVE_COMPILER}
               -DCMAKE_MODULE_PATH=${Geant4Files_DIR}
               -DGEANT4_INSTALL_EXAMPLES=OFF
+              -DOpenGL_GL_PREFERENCE=${OpenGL_GL_PREFERENCE}
 )
 
 # Hardcoded list of external packages used by Geant4, needed to prepare the