make failed, tail of make.log:

  CCLD     telnet
Making all in telnetd
  CC       telnetd.o
  CC       pty.o
  CC       term.o
  CC       utility.o
In file included from utility.c:42:0:
/usr/include/term.h:1060:8: error: field 'Ottyb' has incomplete type
  SGTTY Ottyb,  /* original state of the terminal */
        ^
/usr/include/term.h:1061:3: error: field 'Nttyb' has incomplete type
   Nttyb;  /* current state of the terminal */
   ^
*** Error code 1
The following command caused the error:
echo "  CC      " utility.o;gcc -DHAVE_CONFIG_H -I. -I..  -I../lib -I../lib -I../libinetutils  -I..     -DPATH_DEV=\"/dev/\" -DPATH_TTY=\"/dev/tty\" -DPATH_TTY_PFX=\"/dev/\" -DPATH_LOGIN=\"/usr/bin/login\"  -D_REENTRANT  -g -O2 -MT utility.o -MD -MP -MF .deps/utility.Tpo -c -o utility.o utility.c
make: Fatal error: Command failed for target `utility.o'
Current working directory /home/agn/pretest.2020-01-01.v7a4x3/unstable10x/inetutils-1.9.4.50-9410.nV1nKW/inetutils-1.9.4.50-9410/telnetd
*** Error code 1
The following command caused the error:
fail=; \
if (target_option=k; case ${target_option-} in  ?) ;;  *) echo "am__make_running_with_option: internal error: invalid"  "target option '${target_option-}' specified" >&2;  exit 1;;  esac;  has_opt=no;  sane_makeflags=$MAKEFLAGS;  if {  if test -z '1'; then  false;  elif test -n ''; then  true;  elif test -n '' && test -n ''; then  true;  else  false;  fi;  }; then  sane_makeflags=$MFLAGS;  else  case $MAKEFLAGS in  *\\[\ \	]*)  bs=\\;  sane_makeflags=`printf '%s\n' "$MAKEFLAGS"  | sed "s/$bs$bs[$bs $bs	]*//g"`;;  esac;  fi;  skip_next=no;  strip_trailopt ()  {  flg=`printf '%s\n' "$flg" | sed "s/$1.*$//"`;  };  for flg in $sane_makeflags; do  test $skip_next = yes && { skip_next=no; continue; };  case $flg in  *=*|--*) continue;;  -*I) strip_trailopt 'I'; skip_next=yes;;  -*I?*) strip_trailopt 'I';;  -*O) strip_trailopt 'O'; skip_next=yes;;  -*O?*) strip_trailopt 'O';;  -*l) strip_trailopt 'l'; skip_next=yes;;  -*l?*) strip_trailopt 'l';;  -[dEDm]) skip_next=yes;;  -[JT]) skip_next=yes;;  esac;  case $flg in  *$target_option*) has_opt=yes; break;;  esac;  done;  test $has_opt = yes); then \
  failcom='fail=yes'; \
else \
  failcom='exit 1'; \
fi; \
dot_seen=no; \
target=`echo all-recursive | sed s/-recursive//`; \
case "all-recursive" in \
  distclean-* | maintainer-clean-*) list='lib  libinetutils libtelnet libicmp libls  src telnet telnetd ftp ftpd talk talkd whois ping ifconfig  doc man  tests' ;; \
  *) list='lib  libinetutils libtelnet libicmp libls  src telnet telnetd ftp ftpd talk talkd whois ping ifconfig  doc man  tests' ;; \
esac; \
for subdir in $list; do \
  echo "Making $target in $subdir"; \
  if test "$subdir" = "."; then \
    dot_seen=yes; \
    local_target="$target-am"; \
  else \
    local_target="$target"; \
  fi; \
  (CDPATH="${ZSH_VERSION+.}:" && cd $subdir && make  $local_target) \
  || eval $failcom; \
done; \
if test "$dot_seen" = "no"; then \
  make  "$target-am" || exit 1; \
fi; test -z "$fail"
make: Fatal error: Command failed for target `all-recursive'
Current working directory /home/agn/pretest.2020-01-01.v7a4x3/unstable10x/inetutils-1.9.4.50-9410.nV1nKW/inetutils-1.9.4.50-9410
*** Error code 1
make: Fatal error: Command failed for target `all'