[boost] VC 7.1 level 4 warnings (thread, lexical_cast)

From: Johan Nilsson (johan.nilsson_at_[hidden])
Date: 2004-07-30 02:27:57

[Should this really go to boost.users instead?]

Hi,

loads of warnings are generated when compiling code with VC 7.1 using
Boost.Thread and lexical_cast with the warning level set to 4. I use Boost
1.31.0, but at a quick look at the latest versions they seem to have the
same problem

* Boost.Thread generates numerous C4275 and C4251 (both related to
dll-interface),
examples:
---
../../../deps\boost\boost\thread\exceptions.hpp(29) : warning C4275: non
dll-interface class 'std::logic_error' used as base for dll-interface class
'boost::lock_error'
d:\VS.NET_2003\Vc7\include\stdexcept(14) : see declaration of
'std::logic_error'
../../../deps\boost\boost\thread\thread.hpp(78) : warning C4251:
'boost::thread_group::m_threads' : class 'std::list<_Ty>' needs to have
dll-interface to be used by clients of class 'boost::thread_group'
---
* lexical_cast generates C4511, C4512  + C4127, examples:
--
../../../deps\boost\boost\lexical_cast.hpp(180) : warning C4512:
'boost::detail::lexical_stream<Target,Source>' : assignment operator could
not be generated
...
../../../deps\boost\boost\lexical_cast.hpp(180) : warning C4511:
'boost::detail::lexical_stream<Target,Source>' : copy constructor could not
be generated
...
../../../deps\boost\boost\lexical_cast.hpp(133) : warning C4127: conditional
expression is constant
---
Would it be possible to get rid of those using pragmas in the header files?
I wouldn't mind disabling C4511/4512 globally but the other ones I'd prefer
not to. Selectively disabling the other warnings when including the files is
practically impossible.
I guess this has been discussed before, but why not compile with warning
level 4 + warnings as errors by default?
// Johan