Value getdifficulty(const Array& params, bool fHelp)
{
    if (fHelp || params.size() != 0)
        throw runtime_error(
            "getdifficulty\n"
            "\nReturns the proof-of-work required difficulty now at the tip of the block chain.\n"
            "\nResult:\n"
            "n.nnn       (numeric) The minimum difficulty is defined as 1 and this result is linear relative to that value.\n"
            "            Smaller values indicate harder, larger an easier difficulty and all blocks will have a value < 1.\n"
            "\nExamples:\n"
            + HelpExampleCli("getdifficulty", "")
            + HelpExampleRpc("getdifficulty", "")
        );

    LOCK(cs_main);
    return GetDifficulty();
}

(...)

//! Returns the floating point number that represents a multiple of the minimum
//! difficulty that was required, and found within the given block index entries
//! nBits field.  If the block index pointer given is NULL, then we use the active
//! chain tip block index as the one for which this evaluation is made.
//! minimum difficulty = 1.0, and the value goes down when difficulty is harder,
//! and up when the difficulty is easier.
double GetDifficulty(const CBlockIndex* blockindex)
{
    if (blockindex == NULL)
    {
        if (chainActive.Tip() == NULL)
            return 1.0;
        else
            blockindex = chainActive.Tip();
    }
    uint256 uintBlockDiff;
    uintBlockDiff.SetCompact( blockindex->nBits );
    return 1.0 / GetLinearWork( uintBlockDiff, Params().ProofOfWorkLimit( CChainParams::ALGO_SCRYPT ) );
}

If you want to build anoncoind and anoncoin-cli without using the toolchain.

sudo apt-get update
sudo apt-get upgrade
sudo apt-get install g++ git automake
sudo apt-get install autoconf make libtool pkg-config libqt4-network libqtgui4

After the dependencies got installed, download anoncoin and configure the building process.

cd
git clone https://github.com/Anoncoin/anoncoin.git
cd anoncoin
./autogen.sh
./configure

If you encounter any error.

sudo apt-get install libboost-all-dev git libdb++-dev libssl-dev

If you encounter configure: error: libdb_cxx headers missing.

sudo add-apt-repository ppa:bitcoin/bitcoin
sudo apt-get update
sudo apt-get install libdb4.8-dev libdb4.8++-dev

Now launch the configure again.

./configure

If you want to compile the GUI (anoncoin-qtc). After "make", anoncoin-qtc will be found in src/qt/.

sudo apt-get install libqt4-dev libprotobuf-dev protobuf-compiler
./configure --with-gui=qt4

Now after a succesful configure ending, launch the build.

make -j`nproc`

You now have built src/anoncoind, src/anoncoin-cli and maybe src/qt/anoncoin-qtc.

The executables are quite big because they are built with GCC and you can strip the debug symbols, which reduces the executable size by about 90%.

strip src/anoncoind
strip src/anoncoin-cli
strip src/qt/anoncoin-qtc

Anoncoind and anoncoin-cli will have been created in anoncoin/src folder. To run it the first time, with no previous datadir (if it exists from a previous version please remove everything in ~/.anoncoin but not wallet.dat).

mkdir ~/.anoncoin
cp doc/anoncoin.conf.sample ~/.anoncoin/anoncoin.conf
nano ~/.anoncoin/anoncoin.conf

In anoncoin.conf, change rpcuser, rpcpassword

For clearnet-only comment onlynet=i2p and in i2p.options set enabled=0

For I2P-only uncomment onlynet=i2p and in i2p.options set enabled=1

For I2P and clearnet (mixed mode) comment onlynet=i2p and in i2p.options set enabled=1

For I2P router configuration and settings check https://wiki.anoncoin.net/How_to_setup_your_Anoncoin_wallet#Using_the_command_line_to_generate_a_random_anoncoin_address_and_run_anoncoind_with_I2P

Execute anoncoind and anoncoin-cli

src/anoncoind
src/anoncoin-cli getinfo
src/anoncoin-cli getchaintips