Re: [boost] boost configuration issue

From: John Maddock (john_at_[hidden])
Date: 2005-05-04 04:48:43

>    I think I found a configuration issue while building boost 1.32.0 with 
> VC .Net 2003 (VC71) using STLport 5.0 beta (latest from cvs STLPORT_5_0 
> branch). Maybe someone already notive this problem but the latest boost 
> CVS version still show it.
>
>    With the STLport lib the macro configuration is :
>
> - BOOST_NO_INTRINSIC_WCHAR_T defined
> - BOOST_NO_STD_WSTRING _not_ defined, wstring are supported
>
>    Thanks to the BOOST_NO_STD_WSTRING macro the date_time lib instanciate 
> code for wstring specific type. For instance in 
> libs/date_time/src/gregorian/greg_month.cpp you will find a block of code 
> in a #ifndef BOOST_NO_STD_WSTRING block.
>
>    The date_time lib use the lexical_cast tool. But the lexical_cast tool 
> do not care about BOOST_NO_STD_WSTRING and rather check, among other 
> macros, BOOST_NO_INTRINSIC_WCHAR_T and so do not grant the necessary 
> specialization for wchar_t and wstring. The error message is then 
> something like:
>
> D:\boost_1_32_0\boost/lexical_cast.hpp(137): error: no operator "<<" 
> matches these operands operand types are: std::basic_stringstream<wchar_t, 
> std::char_traits<wchar_t> , std::allocator<wchar_t> > << const 
> std::basic_string<char, std::char_traits<char> , std::allocator<char>> 
> return stream << input;
>
> Sorry for not having the accurate message but I have the compiler on an 
> other computer.

Thanks, I can reproduce that with plain VC++ when building date_time without 
the /Zc:wchar_t switch, I'll look into possible fixes for lexical_cast,

John.