Re: make bootstrap fails.

[Luc Teirlinck]

There is also the question of whether other make's _automatically_ unset
CDPATH.  GNU make does not.  I took a look at some other Makefiles and
it would seem that a value of CDPATH not starting with a colon would
derail _most_ Makefiles, because they use cd with relative names and
apparently do not seem to do any effort to protect themselves from
CDPATH.  Just a long shot: could not unsetting CDPATH automatically be
considered a bug in GNU make?

Sincerely,

Luc.