https://svn.boost.org/trac10/ticket/7736 <p> I note that Boost.Units io.hpp<strong> always</strong> #includes serialization (a not inconsiderable amount of code to parse etc). It would be nice if Serialization could only be included when required (but perhaps this is troublesome?) </p> <p> This became apparent when compiling using Clang 3.1 (Ruben van Boxem's mingw32) on Netbeans 7.2 on Windows 7 when this ugly warning appeared: </p> <pre class="wiki"> In file included from i:/boost-trunk\boost/units/io.hpp:27: In file included from i:/boost-trunk\boost/serialization/nvp.hpp:34: In file included from i:/boost-trunk\boost/serialization/base_object.hpp:39: i:/boost-trunk\boost/serialization/void_cast_fwd.hpp:29:1: warning: dllexport attribute ignored BOOST_DLLEXPORT ^ i:/boost-trunk\boost/serialization/force_include.hpp:37:43: note: expanded from macro 'BOOST_DLLEXPORT' # define BOOST_DLLEXPORT __declspec(dllexport) ^ &lt;built-in&gt;:150:38: note: expanded from macro '__declspec' #define __declspec(a) __attribute__((a)) ^ 1 warning generated. </pre><p> This also suggests that inappropriate dllexport attribute is being generated for Clang? </p> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/7736 Trac 1.4.3