nsc: Fix build problem if gtk config store is disabled
gtk config store pulled in libdl.so for us, so things fail
to link of the config store isn't enabled. This makes nsc
pull in libdl itself when its enabled.
/**
* @anchor modules_anchor
*
* @defgroup simulator Simulator
* The "simulator" module contains:
* - a time management class to hold a time and convert between various time units: ns3::Time
* - a scheduler base class used to implement new simulation event schedulers:
* ns3::Scheduler and ns3::SchedulerFactory
* - a simulator class used to create, schedule and cancel events: ns3::Simulator
*
* @defgroup core Core
* \brief The "core" module contains:
* - a Functor class: ns3::Callback
* - an os-independent interface to get access to the elapsed wall clock time: ns3::SystemWallClockMs
* - a class to register regression tests with the test manager: ns3::Test and ns3::TestManager
* - debugging facilities: \ref logging, \ref assert
* - \ref randomvariable
* - a base class for objects which need to support per-instance "attributes" and
* trace sources: ns3::ObjectBase
* - a base class for objects which need to support reference counting
* and dynamic object aggregation: ns3::Object
* - a smart-pointer class ns3::Ptr designed to work together with ns3::Object
* - a configuration class used to set and control all attributes and trace sources
* in a simulation: ns3::Config.
*
* @defgroup common Common
* The "common" module contains:
* - a packet class to create and manipulate simulation packets:
* ns3::Packet, ns3::Header, and ns3::Trailer. This packet class
* also supports per-packet ns3::Tag which are globs of data
* which can be attached to any packet.
*
* @defgroup node Node
* The "node" module contains:
* - a ns3::Node base class which should be subclassed by any new type of
* network Node.
* - models which abstract the MAC-layer from the IP layer protocols:
* ns3::NetDevice and ns3::Channel.
* - models which abstract the application-layer API: ns3::Application,
* ns3::Socket, ns3::SocketFactory, and, ns3::Udp
*
*
* @defgroup devices Devices
*
* @defgroup internetStack InternetStack
*
* The "internet-stack" module contains:
* - an Ipv4 stack
* - an ARP module
* - a UDP and a TCP implementation
*
* @defgroup helper Helpers
*
* @defgroup applications Applications
*
* @defgroup mobility Mobility
*
* @defgroup routing Routing
*
* @defgroup constants Constants
* @brief Constants you can change
*
* @defgroup contrib Contrib
*/