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<title>Linking with an alternative BLAS library - GNU Scientific Library -- Reference Manual</title>
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<h4 class="subsection">2.2.2 Linking with an alternative BLAS library</h4>
<p>The following command line shows how you would link the same application
with an alternative <span class="sc">cblas</span> library called <samp><span class="file">libcblas</span></samp>,
<pre class="example"> $ gcc example.o -lgsl -lcblas -lm
</pre>
<p class="noindent">For the best performance an optimized platform-specific <span class="sc">cblas</span>
library should be used for <code>-lcblas</code>. The library must conform to
the <span class="sc">cblas</span> standard. The <span class="sc">atlas</span> package provides a portable
high-performance <span class="sc">blas</span> library with a <span class="sc">cblas</span> interface. It is
free software and should be installed for any work requiring fast vector
and matrix operations. The following command line will link with the
<span class="sc">atlas</span> library and its <span class="sc">cblas</span> interface,
<pre class="example"> $ gcc example.o -lgsl -lcblas -latlas -lm
</pre>
<p class="noindent">For more information see <a href="BLAS-Support.html">BLAS Support</a>.
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