as you might already know, I submitted bsnes for review a while ago .
One of the issues pointed out is that it uses its own copies of system
libs - ntsc filter, zip and jma, possibly others. I did contact the
author a while ago (regarding zip), and he said that local zip copy is
needed for windows. I guess he does not really care.
On the other hand, I think that if the usage of system-wide libs could
be conditionalised in an easy and transparent way, he would not mind a
patch. I can't prepare it myself (I cannot code), but if someone
prepares such patch, I am willing to push it upstream - otherwise we
cannot use it since the license is quite restrictive. We can as well
ignore the problem and leave the situation as is. What do you think?