amd64 patches for review again

[Simon 'corecode' Schubert]

Matthew Dillon wrote:
:hey,
:
:now that we branched 1.6 i want to commit these patches.  please review a=
:nd if nobody objects, i will commit them on saturday.
:
:find them at: <http://chlamydia.fs.ei.tum.de/~corecode/unsorted/amd64.dif=
:f>
:
:cheers
:  simon
    The only bit I don't understand is this one in
    gnu/usr.bin/cc34/cc_prep/config/dragonfly-spec.h:
+#define LIBGCC_SPEC "%{shared: -lgcc_pic} %{!shared: -lgcc}"
ah, very cool, somebody read it completely :)

this makes gcc link libgcc_pic for shared libs and libgcc for static libs.  this is needed for amd64, because shared pic code can't get certain fixups for non-pic libgcc.  the libs still stay static.

cheers
 simon
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