compilation issue

[mishra]

Write your question here.
i'm compiling sipxces code in fedora 23 and getting a compilation error:
/home/rmishra/sipxecs/sipXresiprocate/resip/stack/MessageWaitingContents.cxx:600:83: error: no matching function for call to ‘make_pair(const resip::Data&, const resip::Data&)’
h=ncthis->mExtensions.insert(std::make_pair<const Data, Data>(hn,Data::Empty)).first;
i think there is some issue in variable 'Empty' is being passed because it has been declared with different types at different places.
Please help me in finding the sollution.

  PutData&
MessageWaitingContents::header(const Data& hn)
{
   checkParsed();
   return mExtensions[hn];
}

const Data&
MessageWaitingContents::header(const Data& hn) const
{
   checkParsed();
   std::map<Data, Data>::const_iterator h=mExtensions.find(hn);
   if(h==mExtensions.end())
   {
      ErrLog(<< "You called "
            "MessageWaitingContents::header(const Data& hn) _const_ "
            "without first calling exists(), and the header does not exist. Our"
            " behavior in this scenario is to implicitly create the header(using const_cast!); "
            "this is probably not what you want, but it is either this or "
            "assert/throw an exception. Since this has been the behavior for "
            "so long, we are not throwing here, _yet_. You need to fix your "
            "code, before we _do_ start throwing. This is why const-correctness"
            " should never be made a TODO item </rant>");
      MessageWaitingContents* ncthis = const_cast<MessageWaitingContents*>(this);

//getting error in this line
      h=ncthis->mExtensions.insert(std::make_pair<const Data, Data>(hn,Data::Empty)).first;
   }
 the code you need help with here.

[MikeyBoy]

Are you sure you've included the header file containing the definition of make_pair?