[boost] [config] _WIN32 question

From: Vladimir Prus (ghost_at_[hidden])
Date: 2004-07-16 03:58:20

Hello,
in my library I use _WIN32 macro to detect the case when I'm on windows (e.g. 
to get the right header for 'environ'). However, Boost.Config has more 
complex logic:

   #elif defined(_WIN32) || defined(__WIN32__) || defined(WIN32)
   // win32:
   ....

Does it mean I have to use the same conditional? Which compilers define 
__WIN32__ or WIN32, but don't define _WIN32? Shouldn't there be a single 
BOOST_WINDOWS macros to help in this cases?

FWIW, filesystem defines such macro internally:

# if !defined( BOOST_WINDOWS ) && !defined( BOOST_POSIX )
#   if defined(_WIN32) || defined(__WIN32__) || defined(WIN32) 
         || defined(__CYGWIN__)
#     define BOOST_WINDOWS
#   else
#     define BOOST_POSIX
#   endif
# endif

- Volodya