Import('examplesEnv')
  
myEnv = examplesEnv.Clone()

if myEnv['BUILD_PVAR'] == True:
        pvarLibrary = myEnv.SharedLibrary('pvar', 'pvar.c')
        Return('pvarLibrary')
else:
        sources = Split("""main.c""")
        myEnv.Program('btree', sources)