What is the command line for marcusmerge?

[Super Bisquit]

I've done a ./marcusmerge -a -d /usr/ports and the error is "You did
not specify a SRCDIR. aborting ..."
I'm trying to build the Sugar Desktop on FreeBSD i386. For that
project, a few parts from Gnome3 are needed.
Also, what is the current status of NetworkManager- Gnome3- on
FreeBSD? Was it ever successfully ported or not?

Apologies for the noise.