__builtin___clear_cache(): porterbox/buildd binary incompatibility?

[Camm Maguire <camm@maguirefamily.org>]

Greetings!  I suspect that the cache flushing instructions supplied by
gcc's

__builtin___clear_cache()

is suited for some ppc machines, such as partch.debian.org, but not for
some buildd machines, such as porpora or poulenc.

Is this possible?  I have no access to any other ppc machine than partch
on which to check this.  partch builds axiom fine, but

https://buildd.debian.org/status/fetch.php?pkg=axiom&arch=powerpc&ver=20120301-2&stamp=1334067017

>compiling EAB.spad to EAB.nrlib
bash: line 5:  8783 Done                    echo ")co EAB.spad"
      8784 Illegal instruction     | /build/buildd-axiom_20120301-2-powerpc-kIEkis/axiom-20120301/obj/linux/bin/interpsys > /build/buildd-axiom_20120301-2-powerpc-kIEkis/axiom-20120301/obj/tmp/trace

Any help most appreciated.
-- 
Camm Maguire			     		    camm@maguirefamily.org
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"The earth is but one country, and mankind its citizens."  --  Baha'u'llah