BOOST_NO_HASH

From: DEAN STURTEVANT (dean_at_[hidden])
Date: 2001-01-05 13:57:51

I think the presence/absence of hash_set etc. is better handled by a 
define such as BOOST_HAS_HASH. This is more principled in the sense 
that hash is not in the C++-standard, and can more easily handle 
cases where a non-compiler-vendor-supplied STL is used (e.g., the 
STLPort).

Right now, boost\config.hpp doesn't really handle this case that well.