Standard build system should support windows with MSVC

[richard]

The standard build system (ie, configure, autotools, etc) should be able to detect and use MSVC on a windows system. This will require some unix support stuff to be installed, but MSys & Mingw should suffice (ie, a full cygwin installation shouldn't be needed).

Mark has made some progress in this direction, and Richard made a start at looking at it, so this bug is intended as a place to collaborate.

Olly says: "I don't know if libtool's support has bitrotted though. If it has, there's a (very poorly named) wrapper called "wgcc" which translated gcc options to msvc"

[olly]

Slightly random thought - assuming you want to support builds from SVN, if SWIG is reluctant to build with MSVC, it would be easy to tweak bootstrap to get it to configure SWIG to build with mingw or cygwin GCC instead, while Xapian is built with MSVC...