[ndnSIM] ndnSIM example crashes on MAC

[Anil Jangam]

Hi Alex,

Using macOS with MacPorts, I was able to compile ndnSIM on Mac OSX (El
Captain) 10.11.6; however, it crashes while running an example. Below is
the stack trace.

I ran the confogure stage with and without python (i.e. ./waf configure
--disable-python --enable-examples and using macport specific python
version). Can you point out to specific reason why its failing?

anjangam:ns-3 anjangam$
anjangam:ns-3 anjangam$ ./waf --run=ndn-simple --command-template="gdb %s"
Waf: Entering directory `/Users/anjangam/workspace/ndnSIM/ns-3/build'
Waf: Leaving directory `/Users/anjangam/workspace/ndnSIM/ns-3/build'
Build commands will be stored in build/compile_commands.json
'build' finished successfully (2.293s)
Traceback (most recent call last):
  File "/Users/anjangam/workspace/ndnSIM/ns-3/.waf-1.8.12-f00e5b53f
6bbeab1384a38c9cc5d51f7/waflib/Scripting.py", line 108, in waf_entry_point
    run_commands()
  File "/Users/anjangam/workspace/ndnSIM/ns-3/.waf-1.8.12-f00e5b53f
6bbeab1384a38c9cc5d51f7/waflib/Scripting.py", line 171, in run_commands
    run_command('shutdown')
  File "/Users/anjangam/workspace/ndnSIM/ns-3/.waf-1.8.12-f00e5b53f
6bbeab1384a38c9cc5d51f7/waflib/Scripting.py", line 160, in run_command
    ctx.execute()
  File "/Users/anjangam/workspace/ndnSIM/ns-3/.waf-1.8.12-f00e5b53f
6bbeab1384a38c9cc5d51f7/waflib/Context.py", line 92, in execute
    self.recurse([os.path.dirname(g_module.root_path)])
  File "/Users/anjangam/workspace/ndnSIM/ns-3/.waf-1.8.12-f00e5b53f
6bbeab1384a38c9cc5d51f7/waflib/Context.py", line 133, in recurse
    user_function(self)
  File "/Users/anjangam/workspace/ndnSIM/ns-3/wscript", line 937, in
shutdown
    visualize=Options.options.visualize)
  File "/Users/anjangam/workspace/ndnSIM/ns-3/wutils.py", line 215, in
run_program
    return run_argv(execvec, env, cwd=cwd)
  File "/Users/anjangam/workspace/ndnSIM/ns-3/wutils.py", line 132, in
run_argv
    retval = subprocess.Popen(argv, env=proc_env, cwd=cwd).wait()
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py",
line 710, in __init__
    errread, errwrite)
  File "/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/subprocess.py",
line 1335, in _execute_child
    raise child_exception
OSError: [Errno 2] No such file or directory



/anil.
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