<dirent> functions under MinGW

[Bob Friesenhahn]

It turns out that the <dirent> related functionality provided with 
MinGW is hoisted from Cygwin.  As such, it has GPL restrictions.

Libtool is not using its own <dirent> replacement functionality if 
functions like opendir() are already present.  The end result is that 
the final product is GPL rather than LGPL or following package's own 
license.  Ugh.

Bob
======================================
Bob Friesenhahn
address@hidden, http://www.simplesystems.org/users/bfriesen/
GraphicsMagick Maintainer,    http://www.GraphicsMagick.org/