with <b>Step 3</b>.<p>
<hr>

<h3>Step 0: Tools and libraries</h3>
If you already have installed the Fortran compiler <b>gfortran</b>, the
<b>GNU C</b> compiler (or another ANSI C compiler) and the <b>Athena
widget library</b> you can proceed to <b>Step
1</b> unless you wish to update any of the compilers or libraries. Note that 
many implementations of the 3d Athena widget library have bugs preventing their 
use. The default compilation option is now the old ugly widgets.
<b>There is no need to install or u