From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,MAILING_LIST_MULTI, SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id EADE6C433E0 for ; Thu, 21 Jan 2021 11:57:45 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4763C2395A for ; Thu, 21 Jan 2021 11:57:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4763C2395A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linaro.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:34792 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1l2Yat-0001eN-VY for qemu-devel@archiver.kernel.org; Thu, 21 Jan 2021 06:57:44 -0500 Received: from eggs.gnu.org ([2001:470:142:3::10]:59040) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1l2Ya6-0001DQ-Uk for qemu-devel@nongnu.org; Thu, 21 Jan 2021 06:56:55 -0500 Received: from mail-ed1-x534.google.com ([2a00:1450:4864:20::534]:35576) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1l2Ya0-0004hx-UN for qemu-devel@nongnu.org; Thu, 21 Jan 2021 06:56:50 -0500 Received: by mail-ed1-x534.google.com with SMTP id j13so2132840edp.2 for ; Thu, 21 Jan 2021 03:56:48 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=mime-version:from:date:message-id:subject:to:cc; bh=W9RLk4x9fNDz56CV45A0M6D7cJeoPs9nZ8xq3jC9stw=; b=ASR70XFpt7x61ApGJa4CT8/M89Xh3RtFyH3nvJvzezdrdXLtZxQR8C3Ut4O5EZbpBF gNTCcGPdwbFT6UPNIpWKUtvjrmsBW3QIg54Mo47TaZN6YrGZb8xIEf9ABb5IDNYnQvUH KSSwA2e6Wb0N2G8QX68L8gY1H1AYyPsagoZrPo92yIUO7Nw8P3I4sQ2BKE7BCFNPrs/Z RswpUX0qunA/cymNcwo51AWccLnxTk6RsN5qmf7460WLW6pPyA0Z4iNcyDS7/xdOU8e1 yY76SxBQipeyYxklT+zTxMeAtkvxONF8jTs5xDbbsBScNgsXCslN1wV2zVHi/8yafjTJ 8q2Q== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:from:date:message-id:subject:to:cc; bh=W9RLk4x9fNDz56CV45A0M6D7cJeoPs9nZ8xq3jC9stw=; b=k45hTTsSoRJDcNdrq+OWX79dJtcPc1PRZ4tzjeVGr8oVN7aEMrZxcf8q0w92+FCOpp NLAphMho6Cs8QGdJz9waE2GzvsU+yU9hCSrqCNZOFi35n+0ksWRpdp7ird1DpFWaYzSj Cn4d/Fg5Gom07MySL8tVzeO382a3uJSrb075+96FWnSjcWpt2g3bb1VH0AKPMOF20H/C qnaqqrMcrUdiPFnCXr3QN4ZfH6d7yhKn3x3a5hbIk4ePsdZqb9N3IsUNXTlKYpgDjp44 6n03kKeH0kK64pP86ALaN4Fkw0HabvIZBdxdexNbmqd/Q54wGTE2RiIcM+bwFoSmavsf Gz2w== X-Gm-Message-State: AOAM5317iPR7eq7Gr8o50lpQ2RAPqoMwpsOItDiyIe4CLcK9dp3zFmN1 Z71YJiY69YXzbY/3cZOXzhwqbLDyqVB7fodJ4LvLc2d1FPufLQ== X-Google-Smtp-Source: ABdhPJx5PybpTkQrvpJIwYSqYz3g60yEsR5eudzm1D5i75OgtUSVtWBAQI/8G8HCs+FLsTh8jRAXom1fid71rdKk8xU= X-Received: by 2002:a05:6402:b2f:: with SMTP id bo15mr4497812edb.146.1611230207272; Thu, 21 Jan 2021 03:56:47 -0800 (PST) MIME-Version: 1.0 From: Peter Maydell Date: Thu, 21 Jan 2021 11:56:36 +0000 Message-ID: Subject: changing tests/qtest/meson.build causes unnecessary rebuilding To: QEMU Developers Content-Type: text/plain; charset="UTF-8" Received-SPF: pass client-ip=2a00:1450:4864:20::534; envelope-from=peter.maydell@linaro.org; helo=mail-ed1-x534.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, 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-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Paolo Bonzini Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" $ make -C build/arm-clang/ -j8 make: Entering directory '/home/petmay01/linaro/qemu-from-laptop/qemu/build/arm-clang' [1/23] Generating qemu-version.h with a meson_exe.py custom command make: Leaving directory '/home/petmay01/linaro/qemu-from-laptop/qemu/build/arm-clang' $ touch tests/qtest/meson.build $ make -C build/arm-clang/ -j8 make: Entering directory '/home/petmay01/linaro/qemu-from-laptop/qemu/build/arm-clang' /usr/bin/ninja build.ninja && touch build.ninja.stamp [0/1] Regenerating build files. The Meson build system [...] It then goes on to rebuild hundreds or thousands of files, most of which are not even in tests/. (Oddly, the exact set of files recompiled seems to vary from run to run.) Forcing a full rebuild of all of QEMU seems rather excessive when the change was likely "add a new test case"... thanks -- PMM