You can clone with
HTTPS or Subversion.
I hardwired the following to be able to install rmagick, since I don't have Macports:
$ sudo ln -s /bin/mkdir /opt/local/bin/gmkdir
$ sudo ln -s /usr/bin/install /opt/local/bin/ginstall
Because I've seen in lines 85 and 86 of ext/RMagick/Makefile:
MAKEDIRS = /opt/local/bin/gmkdir -p
INSTALL = /opt/local/bin/ginstall -c
Shouldn't the Makefile test if /opt/local/bin/gmkdir and /opt/local/bin/ginstall exists?
Is this still a problem? If not, it would be good to close this, @mmaiza.