Making .lib import libraries with libtool

[LRN]

I have a project that uses autoconf/automake/libtool, and it produces
shared libraries (on Windows that would be .dll) and static libraries
(.a). Which modifications are necessary for it to start outputing .lib
libraries (the ones that could be linked with link.exe) along with
.dll's? I can hack configure script and add calls to lib.exe, but that
doesn't seem right, and i would rather try doing that in configure.ac.