make is an script that basically calls gcc, which is the actual compiler that turns the text files into a binary program, and tells gcc what files and options to include when compiling. So you have to have gcc installed to have the makefile run.
Okay, so now what is the output of
echo $PATH. I'm sure pretty sure you won't see /usr/libexec. So what you can do temporarily is type
PATH=$PATH:/usr/libexec. If you want it to be permanent, you'll have to add this line to the end of your ~/.bash_profile
Code:
export PATH=$PATH:/usr/libexec