https://svn.boost.org/trac10/ticket/13083 <p> MS has come out with /permissive- (read more: <a class="ext-link" href="https://blogs.msdn.microsoft.com/vcblog/2016/11/16/permissive-switch/"><span class="icon">​</span>https://blogs.msdn.microsoft.com/vcblog/2016/11/16/permissive-switch/</a>) </p> <p> This resulted in these errors: </p> <p> 1&gt;C:\Dev\Couloir\3pLibs\Boost\boost_1_64_0\boost/typeof/msvc/typeof_impl.hpp(125): error C2988: unrecognizable template declaration/definition (compiling source file Wt\WGLWidget.C) 1&gt;C:\Dev\Couloir\3pLibs\Boost\boost_1_64_0\boost/typeof/msvc/typeof_impl.hpp(133): note: see reference to class template instantiation 'boost::type_of::msvc_extract_type&lt;ID,T&gt;' being compiled (compiling source file Wt\WGLWidget.C) 1&gt;C:\Dev\Couloir\3pLibs\Boost\boost_1_64_0\boost/typeof/msvc/typeof_impl.hpp(125): error C2143: syntax error: missing ';' before '&lt;' (compiling source file Wt\WGLWidget.C) 1&gt;C:\Dev\Couloir\3pLibs\Boost\boost_1_64_0\boost/typeof/msvc/typeof_impl.hpp(125): error C2913: explicit specialization; 'boost::type_of::id2type_impl' is not a specialization of a class template (compiling source file Wt\WGLWidget.C) 1&gt;C:\Dev\Couloir\3pLibs\Boost\boost_1_64_0\boost/typeof/msvc/typeof_impl.hpp(125): error C2059: syntax error: '&lt;' (compiling source file Wt\WGLWidget.C) 1&gt;C:\Dev\Couloir\3pLibs\Boost\boost_1_64_0\boost/typeof/msvc/typeof_impl.hpp(126): error C2334: unexpected token(s) preceding '{'; skipping apparent function body (compiling source file Wt\WGLWidget.C) </p> <p> I searched and found this: <a class="ext-link" href="https://svn.boost.org/trac10/ticket/4593"><span class="icon">​</span>https://svn.boost.org/trac10/ticket/4593</a> </p> <p> So, I defined _MSC_EXTENSIONS </p> <p> But I got the same errors. </p> <p> Any help would be greatly appreciated. </p> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/13083 Trac 1.4.3 anonymous Tue, 26 Dec 2017 01:04:00 GMT