FreeBSD CVS nvi

cvs -z3 -d:pserver:anoncvs@anoncvs.at.FreeBSD.org:/home/ncvs login
cvs -z3 -d:pserver:anoncvs@anoncvs.at.FreeBSD.org:/home/ncvs co src/usr.bin/vi
cvs -z3 -d:pserver:anoncvs@anoncvs.at.FreeBSD.org:/home/ncvs co src/contrib/nvi

cd src/contrib/nvi/build
./configure --disable-curses

cc -c -O  -I. -I./../include -I./../regex -I./../db/include   -DGTAGS ../ex/ex_script.c
../ex/ex_script.c:27:25: sys/stropts.h: No such file or directory
../ex/ex_script.c: In function `ptys_open':
../ex/ex_script.c:721: error: `I_PUSH' undeclared (first use in this function)
../ex/ex_script.c:721: error: (Each undeclared identifier is reported only once
../ex/ex_script.c:721: error: for each function it appears in.)
gmake: *** [ex_script.o] エラー 1
Exit 2

cd src/usr.bin/vi
make