Problem on compiling grass4.2

[Pan Daiyan]

Hello,

I just compile grass4.2.1 on SGI indigo irix 6.2 and got the following 
messages:

GISBASE=/data1/people/daiyuanp/grasstt
SRC=/data1/people/daiyuanp/grass42/src421/src
CMD=/data1/people/daiyuanp/grass42/src421/src/CMD
HEADER=sgi
ARCH=sgi
####################################################################
GISGEN                              Fri Mar 13 18:25:31 EST 1998
 GISBASE = /data1/people/daiyuanp/grasstt
 SRC     = /data1/people/daiyuanp/grass42/src421/src
 CMD     = /data1/people/daiyuanp/grass42/src421/src/CMD
 HEADER  = sgi
 ARCH    = sgi

first step: man

GISGEN: man - Fri Mar 13 18:17:04 EST 1998

#################################################################
/data1/people/daiyuanp/grass42/src421/man
  make -f OBJ.sgi/make.rules 

        sh ./utilities/Nroff "4.2.1" "V.10 - March 98" 
/data1/people/daiyuanp/grass42/src421/src/..
Note: nroff not found on this system
        rm -f /data1/people/daiyuanp/grasstt /man/help/*
/data1/people/daiyuanp/grasstt not removed: directory
*** Error code 2 (bu21)
GISGEN failure at STEP: man

I would appreciate any helps.

Thanks.

Daiyuan Pan