Compiler warnings

[Cyberthymia]

Hi   I'm trying to compile the SimpleXPathAPI sample project that came with Xalan-C 1.2 (the latest version I could find on xml.apache.org) in Visual C++ 6 Pro, SP5, with the mods listed on the Dinkumware web pages.   First time I build it (straight out of the zip file, only change to make the files write-enabled), it reports 2659 warnings, all of the form:   ...\INCLUDE\xmemory(39) : warning C4100: '_P' : unreferenced formal parameter ...\INCLUDE\vector(249) : warning C4663: C++ language change: to explicitly specialize class template 'vector' use the following syntax:         template<> class vector<bool,class std::allocator<unsigned int> > ... ...\INCLUDE\vector(156) : warning C4018: '<' : signed/unsigned mismatch ...\INCLUDE\xlocnum(179) : warning C4146: unary minus operator applied to unsigned type, result still unsigned ...\INCLUDE\vector(156) : while compiling class-template member function 'void __thiscall std::vector<class ArenaBlock<class XalanDOMString> *,class std::allocator<class ArenaBlock<class XalanDOMString> *> >::insert(class ArenaBlock<class XalanDOMString> ** ,unsigned int,class ArenaBlock<class XalanDOMString> *const & )'   If I reduce the warning level in the project settings to Level 1, this reduces the warnings down to 34 including   C:\xalan\xml-xalan\c\src\XPath\XNodeSetBase.cpp(87) : warning C4355: 'this' : used in base member initializer list ...\INCLUDE\xlocale(277) : warning C4100: '_State' : unreferenced formal parameter ...\INCLUDE\streambuf(182) : while compiling class-template member function 'void __thiscall std::basic_streambuf<char,struct std::char_traits<char> >::imbue(const class std::locale &)' ...\INCLUDE\xmemory(68) : see reference to function template instantiation 'void __cdecl std::_Destroy(const class XalanDOMString ** )' being compiled   Are all these warnings safe to ignore, and why are most of them reported against the C++ libraries (and how do I stop all of them from being reported)? Is this something strange that Xalan is doing, or is my VC++ Install corrupt? I don't get these warnings compiling Xerces, yet they appear against all of the Xalan samples.   I've tried looking through the FAQ, and through the archive of this list but couldn't find anything useful.   The sample programs appear to run correctly, as far as I can tell, but I just want to confirm everything is OK before I start trying to use Xalan for anything important.   Thanks for your help, Richard Jinks   P.S. As an aside, there does appear to be a small error in the Xalan samples project file in that it tries to link in the Xerces library from the wrong directory - it wants to find it in "..\..\..\..\..\..\xml-xerces\c\Build\Win32\VC6\Debug\", but in the zip file I got from xml.apache.org, the path should be "..\..\..\..\xml-xerces\c\Build\Win32\VC6\Debug\" (i.e. two less ..\)