* Paolo Bonzini wrote on Mon, Aug 31, 2009 at 10:00:01PM CEST:
In fact, I think this API shouldn't be even more encouraged. It doesn't
really fix things in an elegant way, and it doesn't help for other
pending issues in the GCC tree (such as the multilib fixups that aren't
applied in all cases; report coming up).
I agree. However, I did not have any alternative idea when I
started using extrasub, and do not have one now. :-(
Just use
AC_CONFIG_COMMANDS([Makefile], [commands to fix up Makefile])
and do whatever $extrasub did yourself in those commands.