ThisDD4hep: add library path for boost

CMakeLists.txt

@@ -98,6 +98,8 @@ SET_TARGET_PROPERTIES(Boost::boost
   PROPERTIES
   INTERFACE_COMPILE_DEFINITIONS BOOST_SPIRIT_USE_PHOENIX_V3
   )
+GET_TARGET_PROPERTY(BOOST_FILESYSTEM_LOC Boost::filesystem IMPORTED_LOCATION)
+GET_FILENAME_COMPONENT(BOOST_DIR ${BOOST_FILESYSTEM_LOC} DIRECTORY)
 
 # Configure Geant4
 if(DD4HEP_USE_GEANT4)

cmake/thisdd4hep.sh

@@ -105,6 +105,7 @@ if [ ${XERCESCINSTALL} ]; then
     #dd4hep_add_path    PATH ${XERCESCINSTALL}/bin;
     dd4hep_add_library_path ${XERCESCINSTALL}/lib;
 fi;
+dd4hep_add_library_path @BOOST_DIR@
 #
 #----PATH---------------------------------------------------------------------
 dd4hep_add_path PATH       ${THIS}/bin;