Hi.
I'm having some strange problems with the C++ driver. I have been digging for some time.
I'm programming against Fedora 21's libmongoclient (2.4.9) and it works. But since I'm deploying to Amazon I need to compile statically so I clone from mongo-cxx-driver. This worked fine last week, but today I pulled the latest rc3 and now I can't even get the hello world app to work (slightly modified):

#include <cstdlib>
#include <iostream>
#include <string>
#include "mongo/client/dbclient.h" // for the driver
using namespace std;

void run() {
    mongo::DBClientConnection c;
    string host = "127.0.0.1";
    mongo::HostAndPort hp(host, 27017);
    string err;
    c.connect(hp, err);
}

int main() {
    mongo::client::initialize();
    try
        { run(); std::cout << "connected ok" << std::endl; }
    catch( const mongo::DBException &e )
        { std::cout << "caught " << e.what() << std::endl; }
    return EXIT_SUCCESS;
}

This code, and my fails to connect and throws this exception:

caught DBClientBase::findN: transport error: 127.0.0.1:27017 ns: admin.$cmd query: { ismaster: 1 }

I tried resetting to rc2 and that revision actually connects without exceptions and I can download a BSONObject, however - this version just returns EOO for fields that actually exists (I can see them in Robomongo and the whole program works with Fedora's libmongoclient).
But since I cannot even get the hello world sample to work something has to be wrong.

I'm compiling with:
sudo scons --prefix=/usr --ssl -j 8 install

And I'm cloning with:
git clone https://github.com/mongodb/mongo-cxx-driver.git