[ndnSIM] Linking error

[Alex Afanasyev]

If you're using conventions in the examples/ folder, then you need to create a new folder that matches name of the scenario and copy .cpp/.hpp files that need to be linked there.

-
Alex

> On Jan 8, 2018, at 12:11 PM, chavoosh ghasemi <chavoosh.ghasemi.off at gmail.com <mailto:chavoosh.ghasemi.off at gmail.com>> wrote:
> 
> I see your point. However, what if we want to link this renamed file to the compilation units? How does it work?
> 
> On Mon, Jan 8, 2018 at 6:22 AM, Alex Afanasyev <aa at cs.fiu.edu <mailto:aa at cs.fiu.edu>> wrote:
> You cannot just rename the scenario, as there is a naming convention of how scenarios are compiled.  Normally, the scenario.cpp file is linked together with ndnSIM and rest of NS-3 and nothing else.  In this case, the scenario is also linked to all compilation units under <scenario>/ folder.  Therefore, if you rename just scenario.cpp, it is no longer linked to other required files and you have errors.
> 
> My default recommendation is to use the scenario template that applies a more user-friendly conventions described in README.
> 
> --
> Alex
> 
>> On Jan 3, 2018, at 11:26 AM, chavoosh ghasemi <chavoosh.ghasemi.off at gmail.com <mailto:chavoosh.ghasemi.off at gmail.com>> wrote:
>> 
>> Yes, it is included ("ndn-load-balancer/random-load-balancer-strategy.hpp"). To clarify the problem, even if I just copy and paste ndn-load-balancer.cpp example and rename it, it won't work. Something is wrong with linking part and I guess maybe I need to add the name of new examples to waf/makefile. If you can, please test it on your own machine and let me know if you had any problem.
>> 
>> On Wed, Jan 3, 2018 at 8:17 AM, Spyridon (Spyros) Mastorakis <mastorakis at cs.ucla.edu <mailto:mastorakis at cs.ucla.edu>> wrote:
>> Hi,
>> 
>> have you included the appropriate header file in your example?
>> 
>> Thanks,
>> 
>> Spyridon (Spyros) Mastorakis
>> Personal Website: http://cs.ucla.edu/~mastorakis/ <http://cs.ucla.edu/~mastorakis/>
>> Internet Research Laboratory
>> Computer Science Department
>> UCLA
>> 
>>> On Jan 2, 2018, at 11:46 PM, chavoosh ghasemi <chavoosh.ghasemi.off at gmail.com <mailto:chavoosh.ghasemi.off at gmail.com>> wrote:
>>> 
>>> Hi,
>>> 
>>> I'm trying to use RandomLoadBalancer strategy in an example; however, apparently, there is a linking error. The example is located in the "examples" directory. Do I need to add the name of this example to any make/waf file?
>>> 
>>> BTW, in continue, you can find the error after trying to run ./waf command.
>>> 
>>> 
>>> [3165/3179] Linking build/src/ndnSIM/examples/ns3-dev-icdn-simple-debug
>>> 
>>> src/ndnSIM/examples/icdn-simple.cpp.1.o: In function `void ns3::ndn::StrategyChoiceHelper::Install<nfd::fw::RandomLoadBalancerStrategy>(ns3::Ptr<ns3::Node>, ndn::Name const&)':
>>> /home/vagrant/ndnSIM/ns-3/build/./ns3/ndnSIM/helper/ndn-strategy-choice-helper.hpp:119: undefined reference to `nfd::fw::RandomLoadBalancerStrategy::getStrategyName()'
>>> /home/vagrant/ndnSIM/ns-3/build/./ns3/ndnSIM/helper/ndn-strategy-choice-helper.hpp:120: undefined reference to `nfd::fw::RandomLoadBalancerStrategy::getStrategyName()'
>>> /home/vagrant/ndnSIM/ns-3/build/./ns3/ndnSIM/helper/ndn-strategy-choice-helper.hpp:123: undefined reference to `nfd::fw::RandomLoadBalancerStrategy::getStrategyName()'
>>> src/ndnSIM/examples/icdn-simple.cpp.1.o: In function `std::unique_ptr<nfd::fw::RandomLoadBalancerStrategy, std::default_delete<nfd::fw::RandomLoadBalancerStrategy> > ndn::make_unique<nfd::fw::RandomLoadBalancerStrategy, nfd::Forwarder&, ndn::Name const&>(nfd::Forwarder&, ndn::Name const&)':
>>> /home/vagrant/ndnSIM/ns-3/build/ns3/ndnSIM/ndn-cxx/util/backports.hpp:75: undefined reference to `nfd::fw::RandomLoadBalancerStrategy::RandomLoadBalancerStrategy(nfd::Forwarder&, ndn::Name const&)'
>>> collect2: error: ld returned 1 exit status
>>> 
>>> Thanks,
>>> - Chavoosh
>>> --
>>> Chavoosh Ghasemi
>> 
>> 
>> 
>> 
>> --
>> Chavoosh Ghasemi
>> 
>> Ph.D. Student in Computer Networking
>> University of Arizona - Computer Science Department
>> Address: Gould-Simpson 721B, 1040 E. 4th Street,
>>                  Tucson, AZ 85721
>> 
>> "The quieter you become, the more you can hear"
>> _______________________________________________
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> ______________
> Alex Afanasyev
> Assistant Professor, SCIS, Florida International University
> 11200 SW 8th Street, ECS Room 261B, Miami, FL 33199
> phone: +1.305.348.4960 <tel:(305)%20348-4960> (office); email: aa at cs.fiu.edu <mailto:aa at cs.fiu.edu>
> web: https://users.cs.fiu.edu/~afanasyev/ <https://users.cs.fiu.edu/~afanasyev/>
> 
> 
> 
> 
> 
> --
> Chavoosh Ghasemi
> 
> Ph.D. Student in Computer Networking
> University of Arizona - Computer Science Department
> Address: Gould-Simpson 721B, 1040 E. 4th Street,
>                  Tucson, AZ 85721
> 
> "The quieter you become, the more you can hear"

______________
Alex Afanasyev
Assistant Professor, SCIS, Florida International University
11200 SW 8th Street, ECS Room 261B, Miami, FL 33199
phone: +1.305.348.4960 (office); email: aa at cs.fiu.edu <mailto:aa at cs.fiu.edu>
web: https://users.cs.fiu.edu/~afanasyev/ <https://users.cs.fiu.edu/~afanasyev/>


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