 that Solaris comes with two compilers, namely,
<code>/opt/SUNWspro/SC4.2/bin/cc</code> and <code>/usr/ucb/cc</code>.  The latter compiler is non-ANSI.  Indeed, it is a perverse shell script
that calls the real compiler in non-ANSI mode.  In order
to compile FFTW, change your path so that the right
<code>cc</code> is used.  
<p>
To know whether your compiler is the right one,  type
<code>cc -V</code>.  If the compiler prints ``<code>ucbcc</code>'', as in  
<p>
<code>ucbcc: WorkShop Compilers 4.2 30 Oct 1996