I am a makefile newbie but would like to try them out. I have installed Rstudio, Rtools, and Gnu Make 3.2 but when I try to test a simple makefile in RStudio I get the following error message:

(It says "'make' is not recognized as an internal or external command, operable program or batch file. \n\nExited with status 1.")
I suspect this might be a PATH issue; there is no reference to Gnu make there but as I said, I rarely dig into the guts of R and never with make. So can anyone advise?
Thanks in advance!
JM