For  &quot;<span style="color:rgb(34,34,34);font-size:14px">mt-d-</span><wbr style="color:rgb(34,34,34);font-size:14px"><span style="color:rgb(34,34,34);font-size:14px">x64&quot;, here &quot;d&quot;  means debug version. It contains some extra symbols for debugging purpose. Without &quot;d&quot;, it&#39;s release version. Use release version as much as possible, usually it&#39;s faster and  smaller.</span><br><br>On Friday, August 20, 2021, Alexander Tanseco via Boost-users &lt;<a href="mailto:boost-users@lists.boost.org">boost-users@lists.boost.org</a>&gt; wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div>I am running a tutorial program and I found out that in the program&#39;s build options under Linker settings/Link Libraries I can put both or either of the ff and the program compiles &amp; runs without errors. What is the difference between the two?</div><div><br></div>libboost_filesystem-mgw8-mt-d-<wbr>x64-1_77.dll.a<div>OR <br><div>libboost_filesystem-mgw8-mt-<wbr>x64-1_77.dll.a<br></div></div></div>
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