Original commit message from CVS:
2004-06-22 Zaheer Abbas Merali <zaheerabbas at merali.org>
* configure.ac:
Add objective-c support if running in Darwin/Mac OS X
* sys/Makefile.am:
* sys/osxvideo:
* sys/osxvideo/Makefile.am:
* sys/osxvideo/osxvideosink.h:
* sys/osxvideo/osxvideosink.m:
* sys/osxvideo/cocoawindow.h:
* sys/osxvideo/cocoawindow.m:
Add osxvideosink, a cocoa-based osx video sink