./configure error concerning autoheader

[Harry Putnam]

Can anyone tell me what it might mean or what is missing on my system
to get the configure error shown below.

This is configuring  bzr grabbed trunk of about 1 hr ago.
on a newish debian (testing)  system.

./configure \
   --prefix=/usr/local/src/bzr/test\
      --with-x \
        --with-x-toolkit=lucid

  [...]
  creating src/epaths.h
  cd /usr/local/src/bzr/emacs/trunk && autoheader
  /bin/sh: autoheader: not found
  make: *** [/usr/local/src/bzr/emacs/trunk/src/stamp-h.in] Error 127
  config.status: executing gdbinit commands