[PATCH] [RFC] fixes for guile-1.8

[Derek Atkins]

Quoting Bill Nottingham <notting at redhat.com>:

> In the NEWS file of guile-1.8.0:
>
> ....
> ** The GC can no longer be blocked.
>
> The global flags scm_gc_heap_lock and scm_block_gc have been removed.
> The GC can now run (partially) concurrently with other code and thus
> blocking it is not well defined.
>
> ....
>
> So, I'd read that as 'no'. (I'm in no way an expert on guile internals.)

Yeah, I'm not an expert, either.  From reading that note I would suspect
that the reasons we tried to block the GC aren't /as/ relevent in 1.8..
So perhaps a guile-version-based compile-time flag would be appropriate.
I know at build-time if we've got 1.6 or 1.8, so we can just put those
blocks within #ifdef GUILE_BLOCK_GC and define /that/ based on a configure
test.

> Bill

-derek

-- 
       Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
       Member, MIT Student Information Processing Board  (SIPB)
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