--- /dev/null
+From 02e9698c96ca78342b82fa7239e93bab4aa45db2 Mon Sep 17 00:00:00 2001
+From: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+Date: Fri, 17 Nov 2017 22:20:06 +0100
+Subject: [PATCH] configure: fix build on non-x86 platforms
+
+When building for an uncommon platform on a ppc64le machine, Qt build
+fails because it builds qmake with the target compiler instead of
+using the host compiler. This is due to the fact that Qt configure
+script believes that both the host and target platforms are "powerpc",
+even though the target really is Xtensa or ARC for example.
+
+Qt's configure script defines a variable called PLATFORM that points to
+the mkspecs describing the host machine. For x86, its value is
+qws/linux-x86-g++ and for x86-64, its value is
+qws/linux-x86_64-g++. For any other host architecture, its value is
+qws/linux-generic-g++.
+
+In parallel to this, Qt's configure script defines a variable called
+XPLATFORM that points to the mkspecs describing the target machine. It
+points to qws/linux-${CFG_EMBEDDED}-g++, where CFG_EMBEDDED is
+simply "generic" for most uncommon architectures.
+
+Therefore, when we're building for an uncommon architecture, on a
+ppc64le machine, we have:
+
+ PLATFORM = qws/linux-generic-g++
+ XPLATFORM = qws/linux-generic-g++
+
+i.e, both values are equal. Due to this, the following condition is
+false:
+
+if [ "$PLATFORM" != "$XPLATFORM" -a "$CFG_EMBEDDED" != "no" ]; then
+
+which causes Qt's configure script to fallback to:
+
+elif [ "$PLATFORM_MAC" = "yes" ] || [ -z "$CFG_ARCH" ]; then
+ CFG_ARCH=$CFG_HOST_ARCH
+fi
+
+because CFG_ARCH is not defined, and therefore gets defined to
+CFG_HOST_ARCH. So we have CFG_ARCH == CFG_HOST_ARCH, and Qt believes
+we're doing a native build.
+
+Therefore, we need to ensure that PLATFORM and XPLATFORM always have a
+different value. To achieve this, we create a
+qws/linux-host-generic-g++ mkspecs, which is always used as
+PLATFORM. It is identical to qws/linux-x86-g++. Compared to
+qws/linux-x86_64-g++, the only difference is that we're not passing
+the -m64 flag, but that isn't needed when building host tools.
+
+Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>
+---
+ configure | 8 +----
+ mkspecs/qws/linux-host-generic-g++/qmake.conf | 10 ++++++
+ mkspecs/qws/linux-host-generic-g++/qplatformdefs.h | 42 ++++++++++++++++++++++
+ 3 files changed, 53 insertions(+), 7 deletions(-)
+ create mode 100644 mkspecs/qws/linux-host-generic-g++/qmake.conf
+ create mode 100644 mkspecs/qws/linux-host-generic-g++/qplatformdefs.h
+
+diff --git a/configure b/configure
+index 10ad7ca0b0..d25f90be1e 100755
+--- a/configure
++++ b/configure
+@@ -2806,14 +2806,8 @@ if [ "$CFG_EMBEDDED" != "no" ]; then
+ Linux:*)
+ if [ -z "$PLATFORM" ]; then
+ case "$UNAME_MACHINE" in
+- *86)
+- PLATFORM=qws/linux-x86-g++
+- ;;
+- *86_64)
+- PLATFORM=qws/linux-x86_64-g++
+- ;;
+ *)
+- PLATFORM=qws/linux-generic-g++
++ PLATFORM=qws/linux-host-generic-g++
+ ;;
+ esac
+ fi
+diff --git a/mkspecs/qws/linux-host-generic-g++/qmake.conf b/mkspecs/qws/linux-host-generic-g++/qmake.conf
+new file mode 100644
+index 0000000000..55011ec52b
+--- /dev/null
++++ b/mkspecs/qws/linux-host-generic-g++/qmake.conf
+@@ -0,0 +1,10 @@
++#
++# qmake configuration for building with linux-g++
++#
++
++include(../../common/linux.conf)
++include(../../common/gcc-base-unix.conf)
++include(../../common/g++-unix.conf)
++include(../../common/qws.conf)
++
++load(qt_config)
+diff --git a/mkspecs/qws/linux-host-generic-g++/qplatformdefs.h b/mkspecs/qws/linux-host-generic-g++/qplatformdefs.h
+new file mode 100644
+index 0000000000..a654aa78a2
+--- /dev/null
++++ b/mkspecs/qws/linux-host-generic-g++/qplatformdefs.h
+@@ -0,0 +1,42 @@
++/****************************************************************************
++**
++** Copyright (C) 2015 The Qt Company Ltd.
++** Contact: http://www.qt.io/licensing/
++**
++** This file is part of the qmake spec of the Qt Toolkit.
++**
++** $QT_BEGIN_LICENSE:LGPL$
++** Commercial License Usage
++** Licensees holding valid commercial Qt licenses may use this file in
++** accordance with the commercial license agreement provided with the
++** Software or, alternatively, in accordance with the terms contained in
++** a written agreement between you and The Qt Company. For licensing terms
++** and conditions see http://www.qt.io/terms-conditions. For further
++** information use the contact form at http://www.qt.io/contact-us.
++**
++** GNU Lesser General Public License Usage
++** Alternatively, this file may be used under the terms of the GNU Lesser
++** General Public License version 2.1 or version 3 as published by the Free
++** Software Foundation and appearing in the file LICENSE.LGPLv21 and
++** LICENSE.LGPLv3 included in the packaging of this file. Please review the
++** following information to ensure the GNU Lesser General Public License
++** requirements will be met: https://www.gnu.org/licenses/lgpl.html and
++** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
++**
++** As a special exception, The Qt Company gives you certain additional
++** rights. These rights are described in The Qt Company LGPL Exception
++** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
++**
++** GNU General Public License Usage
++** Alternatively, this file may be used under the terms of the GNU
++** General Public License version 3.0 as published by the Free Software
++** Foundation and appearing in the file LICENSE.GPL included in the
++** packaging of this file. Please review the following information to
++** ensure the GNU General Public License version 3.0 requirements will be
++** met: http://www.gnu.org/copyleft/gpl.html.
++**
++** $QT_END_LICENSE$
++**
++****************************************************************************/
++
++#include "../../linux-g++/qplatformdefs.h"
+--
+2.13.6
+
projects / buildroot.git / commitdiff