Runtime for "make check-fortran" on Cygwin? What's typical?

[Brooks Moses]

So, I finally got dejagnu worked out to run properly on my Cygwin 
installation.  (The relevant incantation seemed to be "setenv DEJAGNULIBS 
/usr/share/dejagnu", to fix an error of "couldn't find runtext.exp")  And 
so I did a run of "make check-fortran", to make sure it was working, and 
get a baseline before making changes.

Eight hours later, I think it's almost done.  Most of the time, it hasn't 
been using the CPU much at all, but the disk is working away.

Is this normal for Cygwin?  How long does a "make check-fortran" run 
usually take?  What about on non-Cygwin machines?

- Brooks