I had the same problem building on Linux. I found this on a wiki somewhere (can only find it in google cache now):<br><br>&quot;&quot;&quot;(Note:  Make sure that if you build with <b style="color: black; background-color: rgb(153, 255, 153);">
gfortran</b> that <b style="color: black; background-color: rgb(255, 102, 255);">g77</b> is not installed on your system (or at least is not in your <b style="color: white; background-color: rgb(136, 0, 0);">PATH</b> when 
<b style="color: black; background-color: rgb(255, 255, 102);">numpy</b> is being built) as you need to link with the same compiler that you built lapack with when <b style="color: black; background-color: rgb(255, 255, 102);">
numpy</b> builds. It will try and find <b style="color: black; background-color: rgb(255, 102, 255);">g77</b> first which will lead to linking errors if you have built lapack with <b style="color: black; background-color: rgb(153, 255, 153);">
gfortran</b>).&quot;&quot;&quot;<br><br>The trick for me was that step of removing g77 (or taking it out of the path) - then distutils seems to pick up gfortran fine, but otherwise it doesn&#39;t seem to work (even with --fcompiler=gnu95 etc)
<br><br>Cheers<br><br>Robin<br>