not to exploit it correctly.  Other compilers may do the right thing,
but we have not tried them.  Please send us your feedback so that we
can update this FAQ entry.  
<h2><A name="languages">
Question 2.7.  Which language is FFTW written
in?
</A></h2>

FFTW is written in ANSI C.  Most of the code, however, was
automatically generated by a program called
<code>genfft</code>, written in the Objective Caml dialect of ML.  You do not need to know ML or to
have an Objective Caml compiler in order to use FFTW. 
