http://bugs.winehq.org/show_bug.cgi?id=19780
--- Comment #1 from Dan Kegel dank@kegel.com 2009-08-18 17:37:26 --- Oh, I should mention: the PATH is set so vc's bin is earlier than /usr/bin, so it definitely picks up the right mt:
$ which mt /cygdrive/c/Program Files/Microsoft Visual Studio 8/VC/Bin/mt