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Sat, 20 Nov 2021 10:41:02 -0500 Received: from debbugs.gnu.org ([209.51.188.43]:60220) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1moSUA-0001sq-8n for bug-guix@gnu.org; Sat, 20 Nov 2021 10:41:02 -0500 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1moSUA-0001Nv-67 for bug-guix@gnu.org; Sat, 20 Nov 2021 10:41:02 -0500 X-Loop: help-debbugs@gnu.org Subject: bug#52001: numpy CPU dispatch probably prevents builds of python-numpy from being reproducible Resent-From: Ricardo Wurmus Original-Sender: "Debbugs-submit" Resent-CC: bug-guix@gnu.org Resent-Date: Sat, 20 Nov 2021 15:41:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 52001 X-GNU-PR-Package: guix X-GNU-PR-Keywords: To: 52001@debbugs.gnu.org X-Debbugs-Original-To: bug-guix@gnu.org Received: via spool by submit@debbugs.gnu.org id=B.16374228375256 (code B ref -1); Sat, 20 Nov 2021 15:41:02 +0000 Received: (at submit) by debbugs.gnu.org; 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aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=elephly.net header.s=zoho header.b=g4GTaUh1; arc=reject ("signature check failed: fail, {[1] = sig:zohomail.com:reject}"); dmarc=none; spf=pass (aspmx1.migadu.com: domain of bug-guix-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=bug-guix-bounces@gnu.org X-Migadu-Spam-Score: -0.07 Authentication-Results: aspmx1.migadu.com; dkim=fail ("headers rsa verify failed") header.d=elephly.net header.s=zoho header.b=g4GTaUh1; arc=reject ("signature check failed: fail, {[1] = sig:zohomail.com:reject}"); dmarc=none; spf=pass (aspmx1.migadu.com: domain of bug-guix-bounces@gnu.org designates 209.51.188.17 as permitted sender) smtp.mailfrom=bug-guix-bounces@gnu.org X-Migadu-Queue-Id: D81021ED66 X-Spam-Score: -0.07 X-Migadu-Scanner: scn1.migadu.com X-TUID: PiixyctOUEOF Numpy accelerates operations with native code. Early in the build=20 it probes the CPU / compiler for supported instruction extensions=20 and then proceeds to build extensions for different features. I=E2=80=99m= =20 guessing that this won=E2=80=99t work when building on older CPUs, so the=20 results of two builds on different CPUs may differ. It would be helpful if someone could confirm this by building=20 numpy on an older CPU and then compare the build result with that=20 provided by ci.guix.gnu.org. --=20 Ricardo