bitrary prefix that you want prepended to various names.
</p>

<p><em>headers</em> is a list of headers (as strings) that the c-info relies on, (("math.h") for example).
</p>

<p><em>cflags</em> are any special C compiler flags that are needed ("-I." in particular), and
<em>ldflags</em> is the similar case for the loader.  <em>output-name</em> is the name of the
output C file and associated library.  It defaults to "temp-s7-output" followed by a number.
In libm.scm, it is set to "libm_s7" to protect it acro