[Sbcl-devel] One build patch, and one query

[Christophe R. <cs...@ca...>]

Hi,

Firstly, the first patch; it removes :gencgc from
base-target-features, and adds it in local-target-features if
sbcl_arch is x86. This might save future porters some pain, unless we
get a whole new gc implementation by then :)

The second patch should not be applied, I think; it doesn't work, but
I'm using it to try to explain what I want to do. What I would like is
to set sb!c:*backend-subfeatures* to some value that is not nil for
the duration of make-host-2, so that the core is built with
optimizations for the specified subfeatures; also, the resulting core
should have those subfeatures in sb-c:*backend-subfeatures*.

My understanding of the various package-juggling isn't terribly clear,
but I suspect the attached patch does the former but not the latter,
and what I actually want is

(defvar *backend-subfeatures* #.sb-cold:*backend-subfeatures*)

at the definition point and to set up sb-cold:*b-s* via the customizer
mechanism. Is that more likely to work?

Cheers,

Christophe
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