Compiling Grass on Silicon Graphics

[Cristina Milesi]

I'm trying to compile GRASS on a Silicon Graphics. All was going fine 
until the following message appeared:

	mv zoom_pnt.o OBJ/zoom_pnt.o
	cc -s -o /disk2/grass/source/etc/bin/main/inter/i.points 
OBJ/main.o OBJ/ask.o OBJ/ask_mag.o OBJ/analyze.o OBJ/call.o OBJ/cell.o 
OBJ/cellhd.o OBJ/conv.o OBJ/colors.o OBJ/curses.o OBJ/debug.o OBJ/digit.o 
OBJ/dot.o OBJ/drawcell.o OBJ/driver.o OBJ/equ.o OBJ/find.o OBJ/graphics.o 
OBJ/group.o OBJ/input.o OBJ/mark.o OBJ/mouse.o OBJ/points.o OBJ/target.o 
OBJ/title.o OBJ/tty.o OBJ/view.o OBJ/where.o OBJ/zoom.o OBJ/zoom_box.o 
OBJ/zoom_pnt.o 
/disk2/grass/source/src/libes/LIB/libI.a /disk2/grass/source/src/libes/LIB/libD.a 
/disk2/grass/source/src/libes/LIB/libdisplay.a 
/disk2/grass/source/src/libes/LIB/libraster.a 
/disk2/grass/source/src/libes/LIB/libgis.a  -lcurses -ltermlib -lm
ld:
Unresolved:
screen
*** Error code 1 (bu21)
GISGEN failure at STEP: src/imagery/i.points


What is going on?

Thanks in advance for any explanation or suggestion.

Cristina Milesi
C.E.T.A. - Centre for Theoretical and Applied Ecology
c/o Area Science Park
Padriciano,99
34012 Trieste
ITALY