Test if you have gcc and make installed already (the italic text is just a comment, not a command):
locate gcc ; locate make
#--- OR USE find COMMAND ---#
find / -name gcc ; find / -name make
if you got results (using locate for example), like "/bin/gcc" or "/usr/bin/make", then you've got them. If you got no results, then you probably don't have them.
Now if you have those installed, but you get the error saying that they are not in your $PATH, it means that the $PATH does not include the correct directory where the executables are; you can either add the directories where gcc and make were (you got those using either locate or find) to $PATH using set command, OR you can give the make command (for example) with the full path, like
instead of just "make" (change /bin/make to whatever it was when you found it using locate or find).