Starting with this release, the front-end generates warnings for uses
of undefined variables, unreachable code, functions where control can
fall of the end, and unreachable WITH branches. This means that the
v2 warnings are finally pretty much in line with those of the old
This release also adds support for MinGW32 environment in various IO
modules (files, sockets, select, etc.) by Stewart Greenhill.
Configure with CPPFLAGS=-mno-cygwin and LDFLAGS=-mno-cygwin to use the
mingw32 model under cygwin.