https://svn.boost.org/trac10/ticket/11326 <p> Both the suggested patch: <a href="http://www.boost.org/patches/1_58_0/0001-Fix-exec_file-for-Python-3-3.4.patch">http://www.boost.org/patches/1_58_0/0001-Fix-exec_file-for-Python-3-3.4.patch</a> </p> <p> and the fix in git: <a class="ext-link" href="https://github.com/boostorg/python/commit/3e405b6fd5db5615bbef241763de070118222ca7"><span class="icon">​</span>https://github.com/boostorg/python/commit/3e405b6fd5db5615bbef241763de070118222ca7</a> </p> <p> break the build for Python 3.4. </p> <p> The reason is that the check for Python &gt;= 3.4 is wrong. </p> <p> It is: </p> <pre class="wiki">#if PY_VERSION_HEX &gt;= 0x03400000 </pre><p> but it should be: </p> <pre class="wiki">#if PY_VERSION_HEX &gt;= 0x03040000 </pre> en-us /htdocs/site/boost.png https://svn.boost.org/trac10/ticket/11326 Trac 1.4.3