id	summary	reporter	owner	description	type	status	milestone	component	version	severity	resolution	keywords	cc
10018	boost.log compile SO_UPDATE_CONNECT_CONTEXT: Undeclared identifier	Joseph Southwell <joseph@…>	Andrey Semashev	"ASIO now uses SO_UPDATE_CONNECT_CONTEXT on windows. 

This is only defined if _WIN32_WINNT >= 0x0501

Boost.Log uses asio and defaults to defining _WIN32_WINNT to 0x0500

in src/windows_version.hpp

The simplest solution is to drop support for Windows 2000

then change that define to 0x0501. (This is what I did in my env to get it to work)

{{{
using latest github
git clone --recursive git@github.com:boostorg/boost.git modular-boost
git submodule foreach --recursive git checkout master
git submodule foreach --recursive git pull
}}}"	Bugs	closed	To Be Determined	log	Boost Release Branch	Problem	duplicate