[Boost-users] [config] disabling _MSC_EXTENSIONS disables win32

Hello, In visualc.hpp I found the following: #if !defined(_MSC_EXTENSIONS) && !defined(BOOST_DISABLE_WIN32) # define BOOST_DISABLE_WIN32 #endif I.e., disabling MSVC-specific exnetions (/Za) disables also WIN32, which, in turn, leads to undefined BOOST_WINDOWS. So if I try to compile my project with /Za, nothing compiles, because there're lot of places where BOOST_WINDOWS is used to select platform-dependant implementation (eg., in ASIO). But if I understand correctly, the purpose of disabling MSVC *language* extenstions is to ensure that the code is portable & standard-complient. So it seems to be incorrect to imply from this BOOST_DISABLE_WIN32. Am I wrong? Thanks.