Re: let's trace?

 adl> &define_standard_variables also defines all the AC_SUBSTed
 adl> variables.

 Tom> But it defines them by reading header-vars.am.  Maybe I'm
 Tom> not understanding what you mean.

Or I was not clear enough.  &define_standard_variables defines
the variables from header-vars.am, plus the variables from
%configure_vars.  %configure_vars is initialized earlier when
tracing configure.ac and contains *all* AC_SUBSTed variables.

The removed definitions in header-vars.am was just an hardcoded
knowledge of which variables are always AC_SUBSTed by Autoconf
(hence not visible by simply parsing configure.ac and
aclocal.m4).

 Tom> Anyway the question can be settled with the appropriate
 Tom> test case (which might already exist).

That would be pluseq6.test.
-- 
Alexandre Duret-Lutz