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Sun, 04 Oct 2020 08:42:02 -0400 Received: from debbugs.gnu.org ([209.51.188.43]:33553) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1kP3L0-0004tg-CP for bug-guix@gnu.org; Sun, 04 Oct 2020 08:42:02 -0400 Received: from Debian-debbugs by debbugs.gnu.org with local (Exim 4.84_2) (envelope-from ) id 1kP3L0-0002VZ-8M for bug-guix@gnu.org; Sun, 04 Oct 2020 08:42:02 -0400 X-Loop: help-debbugs@gnu.org Subject: bug#43446: Qt Apps cant make use of qtwayland due to QT_PLUGIN_PATH '= wrapping Resent-From: Ricardo Wurmus Original-Sender: "Debbugs-submit" Resent-CC: bug-guix@gnu.org Resent-Date: Sun, 04 Oct 2020 12:42:02 +0000 Resent-Message-ID: Resent-Sender: help-debbugs@gnu.org X-GNU-PR-Message: followup 43446 X-GNU-PR-Package: guix X-GNU-PR-Keywords: To: Brendan Tildesley Received: via spool by 43446-submit@debbugs.gnu.org id=B43446.16018153109624 (code B ref 43446); Sun, 04 Oct 2020 12:42:02 +0000 Received: (at 43446) by debbugs.gnu.org; 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charset=utf-8 Content-Transfer-Encoding: quoted-printable X-ZohoMailClient: External X-Spam-Score: -0.0 (/) X-BeenThere: debbugs-submit@debbugs.gnu.org X-Mailman-Version: 2.1.18 Precedence: list X-Spam-Score: -1.0 (-) X-BeenThere: bug-guix@gnu.org List-Id: Bug reports for GNU Guix List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: 43446@debbugs.gnu.org Errors-To: bug-guix-bounces+larch=yhetil.org@gnu.org Sender: "bug-Guix" X-Scanner: scn0 Authentication-Results: aspmx1.migadu.com; dkim=fail (rsa verify failed) header.d=elephly.net header.s=zoho header.b=YdajPP47; 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-Spam-Score: 1.99 X-TUID: ZoJglaoQNj5u Brendan Tildesley writes: > qt-build-system wraps variables such as QT_PLUGIN_PATH with '=3D > instead of prefix, so when qtwayland is installed in a profile or > included in the environment, the application fails to see it. Programs > run with export QT_QPA_PLATFORM=3Dwayland-egl will fail to launch. > > We could: > > 1. Use 'prefix so that the parent environment's variables are appended > and users have to manually install qtwayland them selves. > 2. Include qtwayland as an input to every qt package somehow. Can the > build system do that? Considering that Wayland seems to be the > future, I feel that Qt GUI applications should support it by > default. I mean, wayland is in the closure of qtbase anyway. > 3. Both? Why is '=3D used anyway? I can=E2=80=99t say why the Qt build system does this, but in other cases we know that 'prefix causes problems because the application may end up loading incompatible binaries leading to a crash. That=E2=80=99s especiall= y the case on foreign distros, e.g. when the Guix-installed graphical application loads a plugin from the system=E2=80=99s XDG_* directories. --=20 Ricardo