[JITTER] Strange options passed to configure by `make distcheck'

[Jose E. Marchesi]

Hi Luca, all.

When doing a `make distcheck' in poke I observed that when it invokes
`configure' it passes a couple of weird options:

  $ ../../configure --with-jitter= --enable-debug= --srcdir=../.. 
--prefix=/home/jemarch/gnu/hacks/poke-2/build/poke-2.0.91/_inst

Note the --with-jitter= and --enable-debug=.  I have no idea where these
options are coming from, and why is `make distcheck' using them.  AFAIK
--with-jitter should not be used when using Jitter in sub-package mode.

Any idea?

PS: the options seem to be inocuous.