Hello,
In this case, it looks like you forgot to install a compiler. Assuming you're still using Ubuntu, the following command should do the trick:
sudo apt-get install build-essential
I see you're trying to compile the server here, don't forget you also need to compile and install the library, first. (I assume you skipped this since it also requires a compiler and you should not have been able to finish that step either without one.)
We're also working on getting the next release out on more different distributions, including a 64 bits ubuntu build (currently we only offer a 32 bits version build for ubuntu on the website - which might work on your system, depending on if you have 32 bits compatibility libraries installed or not).
Regards,
Jaron Viëtor