First, check out the source code using your favorite Subversion client (I recommend TortoiseSVN).

We also need to specify where Qt is to be found (normally C:/Qt/x.y.z where x.y.z is the version number, e.g. 4.4.0).

Of course, we also need to point LDFLAGS, CPPFLAGS and –prefix at c:/met.no.

$ ./autogen.sh
$ LDFLAGS=-Lc:/met.no/lib CPPFLAGS=-Ic:/met.no/include \
    ./configure --disable-shared --prefix=c:/met.no \
    --with-qt4=c:/qt/4.4.0
$ make all install

If you're not going to debug Diana, I strongly recommend stripping the binaries:

$ strip c:/met.no/bin/diana.bin.exe
$ strip c:/met.no/bin/bdiana.exe