From unknown Fri Jun 13 10:22:50 2025 X-Loop: help-debbugs@gnu.org Subject: bug#60733: python build systems does not support cross-compilation Resent-From: Maxim Cournoyer Original-Sender: "Debbugs-submit" Resent-CC: bug-guix@gnu.org Resent-Date: Wed, 11 Jan 2023 16:44:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: report 60733 X-GNU-PR-Package: guix X-GNU-PR-Keywords: To: 60733@debbugs.gnu.org X-Debbugs-Original-To: bug-guix Received: via spool by submit@debbugs.gnu.org id=B.16734554019413 (code B ref -1); Wed, 11 Jan 2023 16:44:02 +0000 Received: (at submit) by debbugs.gnu.org; 11 Jan 2023 16:43:21 +0000 Received: from localhost ([127.0.0.1]:43652 helo=debbugs.gnu.org) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1pFeC9-0002Rl-FZ for submit@debbugs.gnu.org; Wed, 11 Jan 2023 11:43:21 -0500 Received: from lists.gnu.org ([209.51.188.17]:38478) by debbugs.gnu.org with esmtp (Exim 4.84_2) (envelope-from ) id 1pFeC7-0002Rd-9b for submit@debbugs.gnu.org; Wed, 11 Jan 2023 11:43:20 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1pFeC6-0000Dd-MW for bug-guix@gnu.org; Wed, 11 Jan 2023 11:43:18 -0500 Received: from mail-vs1-xe2a.google.com ([2607:f8b0:4864:20::e2a]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1pFeC4-0000Pb-Va for bug-guix@gnu.org; Wed, 11 Jan 2023 11:43:18 -0500 Received: by mail-vs1-xe2a.google.com with SMTP id o63so16288067vsc.10 for ; Wed, 11 Jan 2023 08:43:16 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20210112; h=mime-version:message-id:date:subject:to:from:from:to:cc:subject :date:message-id:reply-to; bh=PrKjnNtAr16vz9va6L/RUWQu572grbVYxZNLsBfhNk4=; b=NFbaXvGbmZINv60AF4/06mGPplJ/G+2BxjWQRndBBXii6dGXAVKIr9j8BVp2awzk3T dcY8SV1+tYo6l/Gvog0+WH7GrQ0kqw8/IV5nkbltpnP+SLGL2xlrtl1kbXoTshslfLjD 3nUO+CZ5RM1dHNTdpTHMTd2sLIhLkXPJy5B5NL8zaJzpNuVQrcrNovdx3GvjxXejbgL2 2A+PQKQzAOpSb09vumO8U53GUjrw0k5HR7V1IN71O5YGMCDi56SyTTg78D/OsJ+G1e51 fs3fv3lnX6T2zA7T7DbrM3/eJMx+u+/RYznn/ip7YMufAiYhSiC1Kx/dFBbYGKyU3r8Q Yr7w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=mime-version:message-id:date:subject:to:from:x-gm-message-state :from:to:cc:subject:date:message-id:reply-to; bh=PrKjnNtAr16vz9va6L/RUWQu572grbVYxZNLsBfhNk4=; b=Qpdwz+RDydT5Yw8nPSGF3CkFc0fl+XJS4E2Ay6IgqErFkiKNucMjZouj6Sd2CpO353 1UEn+9jIkz3DCbb3vTDf8UWWJWB0a7P71Y2Vk7BAqAeG+8n4t2PIi0GUnRPhqoqiwUQx gSNTqCO5uqarR2qYWOmoHQ+iTS8PC6sT5H86bk2HQeByDGoNHNXRl5QMZXjDsqdGp3t9 Or70TNCqW5ESu7eZpntwz00N0ozBWSz32XGAiN2zj6ZeEDxu1omWVa5aQR5ILz2y1JJt 9leIBpY02MfAu7XrsktlDwqTZwNJRohGiU0qiAxCuKFyxAKjA1+8g9QifZbcAE8uZGN1 JShQ== X-Gm-Message-State: AFqh2koroZh7w2xF5pyFA/7PLYGfPaychB/KCeLJ9bXwt9/ZAfTPo/6M Rwcph3U74UsZO06qYg0cViyZ3C3lrqhQlL1y X-Google-Smtp-Source: AMrXdXvla/csjmxhOO5Su0JOHU/qmN8RrGTqc94/rbYp1T6Hs+mI/sWjnp9Yjia4WdZK6mf82E00Xw== X-Received: by 2002:a05:6102:370d:b0:3ce:dbc0:5a6d with SMTP id s13-20020a056102370d00b003cedbc05a6dmr14309663vst.21.1673455395582; Wed, 11 Jan 2023 08:43:15 -0800 (PST) Received: from hurd (dsl-159-79.b2b2c.ca. [66.158.159.79]) by smtp.gmail.com with ESMTPSA id b5-20020a05620a04e500b006ee8874f5fasm9101805qkh.53.2023.01.11.08.43.14 for (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 11 Jan 2023 08:43:15 -0800 (PST) From: Maxim Cournoyer Date: Wed, 11 Jan 2023 11:43:14 -0500 Message-ID: <87r0w1hvj1.fsf@gmail.com> MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=2607:f8b0:4864:20::e2a; envelope-from=maxim.cournoyer@gmail.com; helo=mail-vs1-xe2a.google.com 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_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action X-Spam-Score: -1.3 (-) 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 (--) Hello, Here's an example: --8<---------------cut here---------------start------------->8--- $ guix build --target=aarch64-linux-gnu python-coverage guix build: error: gnu/packages/check.scm:1997:2: python-coverage@5.2.1: build system `python' does not support cross builds --8<---------------cut here---------------end--------------->8--- Python byte compiled files are not architecture dependents, so nothing is needed for them. In some cases where C extensions are used, setuptools or PEP 517 python build systems handle this transparently. So it seems like we should be able to support cross-compiling Python packages easily, which can be useful when building images containing Python packages for embedded systems via cross-compilation. Thoughts? -- Thanks, Maxim