The C preprocessor outputs lines at the start like:
<code># 0 "<built-in>"
# 1 "/project/header.h"
</code>
<code># 0 "<built-in>"
# 1 "/project/header.h"
</code>
# 0 "<built-in>"
# 1 "/project/header.h"
How can I stop it from printing that stuff?