You will need a C compiler to compile ax.

On Windows with Visual Studio
- open a developer command prompt
- change to the ax directory
- run make.bat
- this should run  cl /O2 src/ax.c
  and produce ax.exe

On Windows with MinGW
- open a developer command prompt
- change to the ax directory
- run makegw.bat
- this should run  gcc -O2 src/ax.c -o ax.exe -lm 
  to produce ax.exe

On Mac, Linux, and other platforms
- change to the ax directory
- run make
- this should run  cc -O2 src/ax.c -o ax -lm  
  and produce the executable ./ax

If the system complains that cc does not exist, edit the
Makefile and replace cc with the name of your C compiler.
