Move definition of tester-error before inclusion of format.scm
Define support-error and temporarily comment out show and clone.
Replace ##dynamic-let with with-exception-handler.
Set-gc-report is now called gc-report-set!.

Also, don't enable gc-report by default.
Copy define-meroonet-macro from bigloo/hack.bgl.

It seems meroonet-macros expect to be defined via define-macro, rather
than define-syntax.