Microsoft has now made its optimizing C/C++ compilers for Windows available as a free download. See "http://msdn.microsoft.com/visualc/vctoolkit2003/". Do GNU Autotools work with this compiler?
autoconf, basically. autoconf's check for whether it can use -g is busted, but the effect of this is just a benign warning from the compiler. (I have a patch for this that I submitted to autoconf-patches many months ago; but it was ignored.)
libtool, unfortunately, is quite broken. There is some bitrotted support for cl/lib. But as I understand it this was maimed as a side effect of improvements to gcc/win32 support. I have threatened in the past to fix this; unfortunately, I just haven't found the time.
Braden