&gt; __declspec(dllimport) void blah(void); <br><br>It seems to work without it, but it is the correct thing to do. Many thanks for the suggestion. <br><br>The fix for the link conflict was to add BOOST_ALL_DYN_LINK as below.  I am surprised bjam does not do that on its own. Maybe I am still doing something wrong?<br>
<br>lib mylib : testlib.cpp : <br>   &lt;library&gt;/boost//iostreams<br>   &lt;link&gt;shared:&lt;define&gt;BOOST_ALL_DYN_LINK<br>   &lt;library-path&gt;$(BOOST_LIB)<br>;<br><br>I could not easily find this anywhere, so for the
benefit of google: bjam dll iostreams example multiply defined link conflict
import library <br>
<br>