Strange behaviour of filesystem::relative on Windows

[martin.apel@…]

The following code snippet behaves unexpected under Windows:

   path base("C:\\Temp");
   path contained ("c:\\temp\\test");

   path result = relative(contained, base);

   std::cout << "relative returns " << result.generic_string() << "\n";

It returns an empty path, though the expected result would be something like ".\test". This is due to a case sensitive comparison, which is not consistent with how Windows treats path names.

I understand that this is the way it is documented, but if Boost.Filesystem is understood to be an abstraction layer over different operating systems, this is definitely not the desired behaviour.

I have attached a patch, which fixes the problem.