enable emu-related files based on waf configuration check results

src/lte/examples/wscript

@@ -41,5 +41,5 @@ def build(bld):
                                  ['lte'])
     obj.source = 'lena-x2-handover-measures.cc'
     obj = bld.create_ns3_program('lena-simple-epc-emu',
-                                 ['lte'])
+                                 ['lte', 'emu'])
     obj.source = 'lena-simple-epc-emu.cc'

src/lte/wscript

@@ -41,7 +41,6 @@ def build(bld):
         'helper/lte-stats-calculator.cc',
         'helper/epc-helper.cc',
         'helper/point-to-point-epc-helper.cc',
-        'helper/emu-epc-helper.cc',
         'helper/radio-bearer-stats-calculator.cc',
         'helper/radio-bearer-stats-connector.cc',
         'helper/phy-stats-calculator.cc',
@@ -198,7 +197,6 @@ def build(bld):
         'helper/lte-stats-calculator.h',
         'helper/epc-helper.h',
         'helper/point-to-point-epc-helper.h',
-        'helper/emu-epc-helper.h',
         'helper/phy-stats-calculator.h',
         'helper/mac-stats-calculator.h',
         'helper/phy-tx-stats-calculator.h',
@@ -267,6 +265,10 @@ def build(bld):
         'model/lte-anr.h',
         ]
 
+    if (bld.env['ENABLE_EMU']):
+        module.source.append ('helper/emu-epc-helper.cc')
+        headers.source.append ('helper/emu-epc-helper.h')
+
     if (bld.env['ENABLE_EXAMPLES']):
       bld.recurse('examples')