<p>I was trying to replace the line <code>//  #define ARMA_64BIT_WORD</code> with </p>

<div class="highlight highlight-source-c++"><pre>#<span class="pl-k">ifdef</span> _WIN64
#<span class="pl-k">define</span> <span class="pl-en">ARMA_64BIT_WORD</span>
#<span class="pl-k">else</span>
#<span class="pl-k">define</span> <span class="pl-en">ARMA_32BIT_WORD</span>
#<span class="pl-k">endif</span></pre></div>

<p>but it seems don't work on AppVeyor </p>

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