error building client; oibc.o, oibc.c not in /opt/local-universal-10.4/include

[oeon]

root@joe-virt-4720s-laptop:/home/joe-virt-4720s/dev/iphonelinux/openiboot# cd client && make all && cd ..
cc -DHAVE_GETEUID -I/opt/local-universal-10.4/include -c oibc.c -o oibc.o
oibc.c:6:31: error: readline/readline.h: No such file or directory
oibc.c: In function ‘doInput’:
oibc.c:132: error: ‘rl_basic_word_break_characters’ undeclared (first use in this function)
oibc.c:132: error: (Each undeclared identifier is reported only once
oibc.c:132: error: for each function it appears in.)
oibc.c:133: error: ‘rl_completion_append_character’ undeclared (first use in this function)
oibc.c:139: warning: assignment makes pointer from integer without a cast
make: *** [oibc.o] Error 1

[oeon]

libreadline6-dev wasn't installed