in/echo</code>.  
<p>
If support for SIMD instructions is enabled in FFTW, further compiler
problems may appear: 
<p>
<code>gcc</code> 3.4.[0123] for x86 produces incorrect SSE2 code for
FFTW when <code>-O2</code> (the best choice for FFTW) is used, causing
FFTW to crash (<code>make check</code> crashes).  This bug is fixed in <code>gcc</code> 3.4.4.  On x86_64 (amd64/em64t), <code>gcc</code> 3.4.4 reportedly still has a similar problem, but this is fixed as of
<code>gcc</code> 3.4.6.  
<p>
<code>gcc-3.2</c