Hello,<div><br></div><div>This line of code:</div><div>date birthday(from_simple_string(s));</div><div><br></div><div>causes this error:</div><div><div>Undefined symbols for architecture x86_64:</div><div>  &quot;boost::gregorian::greg_month::get_month_map_ptr()&quot;, referenced from:</div>
<div>      unsigned short boost::date_time::month_str_to_ushort&lt;boost::gregorian::greg_month&gt;(std::string const&amp;) in boost2-aLwtLt.o</div><div>ld: symbol(s) not found for architecture x86_64</div></div><div><br>
</div><div>Any help will be appreciated. Thanks.</div><div><br></div><div>Regards,</div><div><br></div><div>Phil</div>