something still wrong with happy?

[Malcolm Wallace]

> There appears to be a problem whereby if you're using Happy from the
> build tree, and you re-configure without removing config.cache, the
> configure script forgets the location of Happy.  I'm looking into this.

Yes, I hadn't realised it, but this does appear to be the symptom.
When I remove config.cache, a fresh call of configure fills in the
in-place location of happy correctly.  But a second call of configure
without removing config.cache loses the location.

> bizarre... in what way?

Why should the script look for a version number of something it just
claimed does not exist?

> Does it make more sense if you read the first
> line as "checking for [installed] happy... no"?

Slightly more sense, yes.  The following would be even clearer:

    checking for installed happy... no... but using happy from the source tree
    checking for version of happy... 1.9

Regards,
    Malcolm