If you use liboss, you might need to edit /opt/local/lib/pkgconfig/liboss.pc and remove -Wno-precomp (liboss 0.0.1 is known to be broken and crashes, so I discourage the use of liboss)

To configure Darwin, my experience is that you need to run configure like this:

PATH=$PATH:/opt/local/bin LDFLAGS=-L/opt/local/lib CFLAGS=-I/opt/local/include CXXFLAGS=-I/opt/local/include CPPFLAGS=-I/opt/local/include CPPCXXFLAGS=-I/opt/local/include ./configure

and optionally add things like --prefix etc.

To get curses up and running with colors, you need to run ocp like this

TERM=xterm-color ocp

or

export TERM=xterm-color

before you run ocp