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[73.97.103.127]) by smtp.gmail.com with ESMTPSA id w206sm3078542pfc.28.2020.06.02.11.59.06 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 02 Jun 2020 11:59:07 -0700 (PDT) From: Chris Marusich To: bug-guix@gnu.org Subject: Cross-compiled powerpc64-linux bootstrap-tarballs not reproducible Date: Tue, 02 Jun 2020 11:59:03 -0700 Message-ID: <874krtnvk8.fsf@gmail.com> User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/26.3 (gnu/linux) MIME-Version: 1.0 Content-Type: multipart/signed; boundary="=-=-="; micalg=pgp-sha256; protocol="application/pgp-signature" Received-SPF: pass client-ip=2607:f8b0:4864:20::435; envelope-from=cmmarusich@gmail.com; helo=mail-pf1-x435.google.com X-detected-operating-system: by eggs.gnu.org: No matching host in p0f cache. That's all we know. X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, FREEMAIL_FROM=0.001, RCVD_IN_DNSWL_NONE=-0.0001, SPF_PASS=-0.001, URIBL_BLOCKED=0.001 autolearn=_AUTOLEARN X-Spam_action: no action X-Spam-Score: 0.7 (/) X-Debbugs-Envelope-To: submit X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: debbugs-submit-bounces@debbugs.gnu.org Sender: "Debbugs-submit" X-Spam-Score: -2.3 (--) --=-=-= Content-Type: text/plain Content-Transfer-Encoding: quoted-printable Hi, As demonstrated in the following email thread, the powerpc64-linux bootstrap-tarballs are not reproducible when cross-compiled from an x86_64-linux system: https://lists.gnu.org/archive/html/guix-devel/2020-06/msg00003.html Four people attempted to invoke the following command using Guix commit 8159ce1970d91567468cf1bacac313099a009d2a: guix build --no-substitutes --target=3Dpowerpc64-linux-gnu bootstrap-tarb= alls All of the bootstrap tarballs except for gcc-stripped were reproducible. However, these attempts produced four different versions of gcc-stripped-5.5.0-powerpc64-linux-gnu.tar.xz. At least two of the attempts were performed on two different x86_64-linux systems. The derivation that produced the differing output was: /gnu/store/pygln3lr6qbxcps3kmn3w4bc0d0nlpd3-gcc-stripped-tarball-5.5.0.drv You can build this derivation in a variety of ways, for example: guix build --target=3Dpowerpc64-linux-gnu -e '(@ (gnu packages make-boots= trap) %gcc-bootstrap-tarball)' or just guix build /gnu/store/pygln3lr6qbxcps3kmn3w4bc0d0nlpd3-gcc-stripped-tarba= ll-5.5.0.drv On my x86_64-linux system, twice I tried running "guix build --check" on this derivation, but each time it surprisingly reported no difference. Out of paranoia, I tried deleting its output with "guix gc --delete", and then building it again. The new output was, indeed, identical to the old output. This makes me think that the non-reproducibility is coming from something outside the immediate build logic of the gcc-stripped-tarball-5.5.0.drv derivation itself. I will next try to rebuild everything from scratch again. I will also try to get copies of the differing outputs from the people involved in that email thread, in order to run diffoscope on them. =2D-=20 Chris --=-=-= Content-Type: application/pgp-signature; name="signature.asc" -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEy/WXVcvn5+/vGD+x3UCaFdgiRp0FAl7WoXcACgkQ3UCaFdgi Rp0twQ//VDfFrWpdAkX4XpGke8c4sT6/W2LbR7N+xl126nbXhcAKjH13SCjgX3vp /Yrik1IlnEhXwPpujU6GXLv7UbjZLBDERMOee0bFpreaq9TQMq2NJQkcoKE4kOSr +ockDEE71tv4ZEjW3hY8funw9uRGoZBcyPYHyIjd0bNYvRAa1x8nuhrXYE5+rRZ2 h/2k5tynQrkMpxUEVQr0XL0OWXhY5VPD9Wwgd3anY/l643RIg2eLTDF1kvnRCdOq OFN+88hWEx3QzPMZ852SSc99XkHRBaboFkrNIquxIU2lsOHiUSwOkT4/NrdOoeW7 +pXgJ2dcUNvI1JHER50NUjHBndqCke1bYUbCll0f9VE7hi1z/V/hut4t7a5uTUXp QP+aLeS9WDDDyFHwYPf6hotjNwCyOE1aBo0LlNpR+nIX4WSDYCzSKIFQFAva84l2 TDRte0rIKcZ/B3xRraGjgFwJBezme8RkOiORNzFpcRzf0y5hCSPvL3cLc8XmsbAl HT8pCdm0b3kSlBNQmUSV+XxnXvpIUDnxernYb7PEYhgWsopyHBgQtfxMqCj/IZtE OXeh/oumsuKZWxDcgbUI81liQPNlrFlXgfsWiUmtBmv56g/jFko+e+IgIIZroGWj iWHVBGz1EMaENBMXpga4g7XMRTXoXO3QB9xGQ34mHsZC007QPwQ= =DG+o -----END PGP SIGNATURE----- --=-=-=--