using my own configure options

[Gustavo A. Baratto]

For sure this was discussed before, but I can't find any reference in the porter's handbook nor in the bsd.port.mk. Or maybe I just didn't get the point :)

I want to specify my own configure args, and redefine LIB_DEPENDS, RUN_DEPENDS without having to edit the Makefile

something like:
make CONFIGURE_ARGS=list_of_args \ LIB_DEPENDS=jpeg.9:${PORTSDIR}/graphics/jpeg:install

Is this possible?

I tried "make CONFIGURE_ARGS=--prefix=/home/user" for the rsync port and it seems that "--prefix=/home/user" is appended to the CONFIGURE_ARGS in the Makefile...  I want to be able to completely redefine this... 

Thanks