http://bugs.winehq.com/show_bug.cgi?id=1591
------- Additional Comments From mike@theoretic.com 2003-19-07 07:19 ------- Strange, but this has happened to me before (but not with libXv, a different lib).
Try converting the .a file into a .so file, iirc something like
gcc -shared -o libXv.so.1 libXv.a
should do the trick.