[bbv2] Suggestion of a fix to build date_time with msvc toolset

From: Samuel DEBIONNE (dj_samy_at_[hidden])
Date: 2005-04-01 10:45:42

I'm encountering a problem to build the date_time library with BBv2 
under NT with msvc 7.1. I believe this problem has already been 
mentioned in this news group, but I prefer to remember it shortly:

bjam --v2 libs/date_time/build

gives an error in boost\lexical_cast.hpp(150) : error C2679. (no 
operator found which takes a right-hand operand of type 'type' (or 
there is no acceptable conversion)). And other following messages...

The same code (fortunately!) compiled well with BBv1. So I compared 
the compiler "cl" command lines called by bjam and find out that he 
only difference that makes it work (v1) or not (v2) is 
the /Zc:wchar_t option that makes wchar_t become a native type. I 
don't see any straight relation between this option and the error...

Finally, I would like some help to implement a fix that would add 
the /Zc:wchar_t option either all the time when msvc toolset is used 
or only for some specified Jamefiles.

Samuel DEBIONNE