I noticed that this variable went away somewhere in 1.9; it seems to be
present in 1.6 and 1.8.  In 1.9, there is Config::CONFIG['abs_srcdir'],
but its value is not useful to me:

  CONFIG["abs_srcdir"] = "$(ac_abs_srcdir)"
  CONFIG["abs_top_srcdir"] = "$(ac_abs_top_srcdir)"
  ...

I'm not sure if there's something wrong with the code that expands these
variables or the the code that generates rbconfig.rb.  Other variables
like CONFIG['LIBRUBY'] seem to be okay.

FWIW, I'm using autoconf 2.59 (also tried with 2.57; same results).

Questions:

  1. Why has CONFIG['srcdir'] gone away?

  2. Why is CONFIG['abs_srcdir'] set to the value it is?  Will this be
     fixed?

Thanks,

Paul