1.7.8 compile nit on FreeBSD 4.7, semi-broken compile results

[Greg Troxel]

In src/engine/gnc-session.c, I got a 'discarding const' warning in
gnc_run_rpc_server for

    dll_err = dlerror();

Since the prototype for dlerror (on FreeBSD 4.7ish) is:
  const char *dlerror __P((void));

I added const to the declaration/definition of dll_err:

  const char * dll_err;


With that and the GNOME_LIBS change from my earlier note (actually I
included the contents of GNOME_LIBDIR in GNOME_LIBS and GNOMEUI_LIBS
in config.status and reran it, since that was easier than automaking),
gnucash built ok.

On startup, it ran for 40 seconds (PII-400 with 384 MB) and then
segfaulted.  This seems like way too long.

Starting 'gnucash-env guile', (use-modules (gnucash gnc-module)) is
ok, and the trouble seems to be in (gnc:module-system-init).  Doing
(use-modules (gnucash main)) takes a while but finished without error,
but then running (set-current-module (resolve-module '(gnucash main)))
and (gnc:main) by hand seems to work - I get a gnucash window and the
tip of the day!

I'll be playing with this more; the problem seems non-repeatable.

Any hints of running all this dlopened stuff under a debugger are
welcome.