Can't run make - gcc: command not found

Maybe simple...

sudo apt-get install gcc

... could be enough?

Do this: open a terminal and type gcc --version. Does anything come up?

Alternatively, search for the gcc executable, which should be located in /usr/bin. Do ls /usr/bin | grep gcc. What output do you get from that command?

If you get no output from either command, then you need to find your gcc executable wherever you installed it (somewhere in /usr/share maybe?). When found, do cd /usr/bin && ln -s [ABSOLUTE PATH OF GCC].

If you got no output from the first, but output from the second, then you have serious trouble, because /usr/bin is not in your PATH. Edit the file /etc/environment and ADD the following line to the end of the document: PATH="$PATH:/usr/bin".

If you got output from the first, then there is a problem somewhere with bash not reading its own PATH. I think hell would freeze before the first works, but watch you prove me wrong and freeze hell for me. :)

Hope this helps! +1 me if it does!

/usr/bin/gcc is a link to the gcc compiler in use

It is not unusual to have multiple versions of gcc installed. there binaries are in the same folder, e.g. gcc-4.4 gcc-4,6 and gcc-4.7

The link /usr/bin/gcc will point to one of these versions. If it is the wrong version, then the change the link to gcc-4.6.