[ndnSIM] New Ubuntu machine - new bizarre errors

Wed Jan 4 00:37:59 PST 2017

Ooops.  The instructions in README pointing to wrong places.  Will fix that.

As for the shared library error.  Assuming you're on Linux, restart or running `sudo ldconfig` should solve the problem.

---
Alex

> On Jan 3, 2017, at 11:02 PM, John Baugh <jpbaugh at umich.edu> wrote:
> 
> Alex,
> 
> I'm getting closer.  With the link to the scenarios you provided me, I was able to put my files in scenarios folder and try ./waf configure and ./waf from ndnSIM/my-simulations.
> 
> I used a different, simpler scenario now, called jpb-4-print.  I now get this error when I attempt to run it.  It compiles now, but appears to have a linker issue:
> 
> jpbaugh at Janeway:~/ndnSIM/my-simulations$ ./waf
> Waf: Entering directory `/home/jpbaugh/ndnSIM/my-simulations/build'
> [1/2] Compiling scenarios/jpb-4-print.cpp
> [2/2] Linking build/jpb-4-print
> Waf: Leaving directory `/home/jpbaugh/ndnSIM/my-simulations/build'
> 'build' finished successfully (5.089s)
> jpbaugh at Janeway:~/ndnSIM/my-simulations$ ./waf --run=jpb-4-print
> Waf: Entering directory `/home/jpbaugh/ndnSIM/my-simulations/build'
> Waf: Leaving directory `/home/jpbaugh/ndnSIM/my-simulations/build'
> 'build' finished successfully (0.025s)
> build/jpb-4-print: error while loading shared libraries: libns3-dev-core-optimized.so: cannot open shared object file: No such file or directory
> 
> 
> Thanks,
> 
> John
> 
> On Wed, Jan 4, 2017 at 1:51 AM, John Baugh <jpbaugh at umich.edu <mailto:jpbaugh at umich.edu>> wrote:
> Alex,
> 
> This is where I found the instructions:
> 
> https://github.com/named-data-ndnSIM/scenario-template <https://github.com/named-data-ndnSIM/scenario-template>
> 
> The README file on that page says to do:
> 
> git clone git://github.com/cawka/ndnSIM-scenario-template.git <http://github.com/cawka/ndnSIM-scenario-template.git> my-simulations
> 
> The wscript from this location does contain a reference to the libndn-cxx library.
> 
> I think the README needs updated...  It uses a different repository.
> 
> I'm about to try the tests again.
> 
> Thanks,
> 
> John
> 
> On Wed, Jan 4, 2017 at 1:38 AM, Alex Afanasyev <aa at cs.ucla.edu <mailto:aa at cs.ucla.edu>> wrote:
> 2.3 should be ok.  Which exactly repository you cloned for scenario-template?  I just checked with the one listed on ndnSIM website (https://github.com/named-data-ndnSIM/scenario-template.git <https://github.com/named-data-ndnSIM/scenario-template.git>) and everything is working.
> 
> The correct template repository should not have this check:
> 
>      ...
>      Checking for 'libndn-cxx'                : not found
>      ...
> 
> The you should have directory structure something like this
> 
> some-folder-for-simulations/
> ├── ns-3/
> │   ├── ...
> │   ├── src/
> │   │   ├── ...
> │   │   ├── ndnSIM/
> │   │   │   ├── ndn-cxx/
> │   │   │   ├── NFD/
> │   │   │   ├── model/
> │   │   │   ├── ...
> │   │   ├── ...
> │   ├── ...
> ├── pybindgen/
> │   ├── ...
> └── scenario/
>     ├── README.md
>     ├── extensions/
>     │   ├── README.md
>     │   ├── some-code.hpp
>     │   └── some-code.cpp
>     ├── graphs/
>     │   ├── ...
>     ├── results/
>     ├── run.py
>     ├── scenarios/
>     │   ├── README.md
>     │   └── scenario-name.cpp
>     ├── waf
>     └── wscript
> 
> When you're inside scenario/ folder, you can run `./waf --run scenario-name` (files in scenarios/ folder are getting compiled into individual scenarios).
> 
> ---
> Alex
> 
>> On Jan 3, 2017, at 9:56 PM, John Baugh <jpbaugh at umich.edu <mailto:jpbaugh at umich.edu>> wrote:
>> 
>> Junxiao,
>> 
>> That is peculiar...  perhaps I should ask a different question:
>> 
>> Should I be using ndnSIM 2.3, even?  Or should I just go back to 2.1?
>> 
>> If so, how might I accomplish this to ensure I don't get the newest version?
>> 
>> Thanks,
>> 
>> John
>> 
>> On Wed, Jan 4, 2017 at 12:51 AM, Junxiao Shi <shijunxiao at email.arizona.edu <mailto:shijunxiao at email.arizona.edu>> wrote:
>> Hi John
>> 
>> The scenario template, as of commit 2b5b6f55f04982273e62127082a19459ec68ff43 <https://github.com/named-data-ndnSIM/scenario-template/tree/2b5b6f55f04982273e62127082a19459ec68ff43> , is compatible with ndnSIM 2.1, and may or may not work with other versions.
>> However, I do not see why the scenario template is looking for ndn-cxx, because there's no "ndn-cxx" token in its wscript.
>> 
>> Yours, Junxiao
>> 
>> On Tue, Jan 3, 2017 at 10:44 PM, John Baugh <jpbaugh at umich.edu <mailto:jpbaugh at umich.edu>> wrote:
>> Junxiao,
>> 
>> By "./waf configure and ./waf inside the scenario template", I took that as the ./waf inside my my-simulations directory, correct?
>> 
>> I performed the ./waf configure from inside there after doing a ./waf install (from inside ns-3 directory), and I get the following:
>> 
>> jpbaugh at Janeway:~/ndnSIM/my-simulations$ ./waf configure
>> Setting top to                           : /home/jpbaugh/ndnSIM/my-simulations
>> Setting out to                           : /home/jpbaugh/ndnSIM/my-simulations/build
>> Checking for 'gcc' (C compiler)          : /usr/bin/gcc
>> Checking for 'g++' (C++ compiler)        : /usr/bin/g++
>> Checking supported CXXFLAGS              : -std=c++11
>> Checking supported CXXFLAGS              : -pedantic -Wall -O2 -g
>> Checking for program 'pkg-config'        : /usr/bin/pkg-config
>> Checking for 'libndn-cxx'                : not found
>> The configuration failed
>> (complete log in /home/jpbaugh/ndnSIM/my-simulations/build/config.log)
>> 
>> 
>> My obvious assumption is that it cannot find the ndn-cxx library.  But I am following the instructions by the letter.  This is a fresh computer and a fresh install, so what might be the issue here?  And what is the best / appropriate corrective measure, as I assume ndnSIM is already installed.
>> 
>> Thanks,
>> 
>> John
>> 
>> On Wed, Jan 4, 2017 at 12:36 AM, Junxiao Shi <shijunxiao at email.arizona.edu <mailto:shijunxiao at email.arizona.edu>> wrote:
>> Hi John
>> 
>> 1.)  Since I already had installed ndnSIM using the instructions in Getting Started on the main ndnSIM.net <http://ndnsim.net/> page, I don't have to perform another git clone on ns-3-dev-ndnSIM.git or any of those files right?  It seems it's just downloading a separate copy of ndnSIM to put in a separate directory.  So, all I did per the instructions was a git clone on the ndnSIM-scenario-template-git.
>> You don't need to clone ns-3 or ndnSIM again, as long as you have compatible version.
>> 
>> 2.)  I placed the downloaded branch (terminology might be off here) in my-simulations, which in turn I have inside the ndnSIM folder.  So, my-simulations is a directory that is a sibling directory of ns-3 and pybindgen, all three being inside the top level ndnSIM folder.  Is this correct / ok?
>> Yes, this is correct. scenario template must be outside of ns-3 folder.
>> 
>> 3.)  I am very confused about the difference between the extensions and scenarios directories.  I was under the impression I could put a subdirectory under extensions named as my scenario, so I named a subdirectory of extensions "jpb-strategy1-test", which contains jpb-strategy1.cpp and a umd/ directory with some classes I'm using (they worked fine with ndnSIM 2.1.)  Is this correct?
>> You may place multiple files in extensions/ folder, which will be linked with every scenario.
>> Every file in scenarios/ folder is an individual simulation which must have a main() function. Every file is linked with every object from extensions/ to create an executable.
>> 
>> 4.)  Now, it cannot find the scenario, regardless of whether its inside extensions or scenarios.  Does a .cpp or .cc file have to be at the top level or can I put a subdirectory?  I just want to remain organized.  I get the following:
>> 
>> jpbaugh at Janeway:~/ndnSIM/ns-3$ ./waf --run=jpb-strategy1-test
>> Waf: Entering directory `/home/jpbaugh/ndnSIM/ns-3/build'
>> program 'jpb-strategy1-test' not found; available programs are: ['subdir', 'scratch/subdir/subdir', 'scratch-simulator', 'scratch/scratch-simulator', 'test-runner', 'utils/test-runner', 'bench-simulator', 'utils/bench-simulator', 'bench-packets', 'utils/bench-packets', 'print-introspected-doxygen', 'utils/print-introspected-doxygen', 'tap-device-creator', 'src/fd-net-device/tap-device-creator', 'raw-sock-creator', 'src/fd-net-device/raw-sock-creator', 'tap-creator', 'src/tap-bridge/tap-creator']
>> You must first `sudo ./waf install` from ns-3 which installs ns-3 including ndnSIM system-wide (optimized build is recommended), and then `./waf configure` and `./waf` inside the scenario template.
>> 
>> Yours, Junxiao
>> 
>> 
>> 
> 
> 
> 

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