Thanks for the help, but I'm getting an error when I try to build the graphical interface:
make: makefile.unix: No such file or directory
make: *** No rule to make target `makefile.unix'. Stop.
sorry, my fault, I forgot you need to cd one more directory in....
Go to ~/bytecoin/src
and THEN
make -f makefile.unix bytecoind USE_UPNP=
and continue the steps from there, sorry about that...
I did not have a problem building the gui (qt) version.
The easy way is to use qt creator. You can install it using apt, aptitude or your distro's software center, just search/install qtcreator.
Once installed just start it up and point it to the bitcoin-qt.pro file in your bytecoin directory. Click the configure button and wait for the creator to parse the file.
The hammer icon (compile) will go from grey to color when ready. Hit that icon and qt creator will compile the qt(gui) version in a new folder with a name like Bitcoin-qt-build....
When done your should have a bitcoin-qt (which is bytecoin, the developer just did not change the name in the make files) executable ready to go.