added rpath for root

Author: maureeungaro

SConstruct

@@ -1,7 +1,11 @@
 from init_env import init_environment
 
+import os
+ROOTSYS = os.environ['ROOTSYS']
+
 env = init_environment("qt5 clas12 clhep evio root geant4 xercesc mlibrary hipo")
-env.Append(CXXFLAGS = ' -std=c++17 ')
+env.Append(CXXFLAGS = ' -std=c++11 ')
+env.Append(RPATH = ROOTSYS + '/lib')
 
 # library
 lib_sources     = Split("""src/banks.cc""")