Hi there, I have the following Makefile: sudoku-solver: sudoku2.c g++ sudoku2.c -o sudoku-solver When I run make on my Mac, the sudoku2.c compiles flawlessly and works fine. Now, on my Linux machine, I "tried" to install the GNU compiler (i suck at Linux! So I don't know if I installed it correctly or not!) But when I run make on Linux, I get an error saying that the files #include <stdio.h> #include <stdlib.h> #include <math.h> where not found!! So is this because I didn't correctly install the libraries, or do I have to include these files some other way on a Linux? Thanks!