b52b5fa082
We don't have a way to rename main() inside a LLVM bit-code file yet, so we error out if we detect that LTO is enabled (which causes object files to be written as LLVM bit-code), and inform the user about a workaround. Task-number: QTBUG-40184 Change-Id: I89c927a3a7f075c65e54442c4f7e6bb25175b6f7 Reviewed-by: Richard Moe Gustavsen <richard.gustavsen@digia.com>
80 lines
3.2 KiB
Bash
Executable File
80 lines
3.2 KiB
Bash
Executable File
#!/bin/bash
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#############################################################################
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##
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## Copyright (C) 2014 Digia Plc and/or its subsidiary(-ies).
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## Contact: http://www.qt-project.org/legal
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##
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## This file is the build configuration utility of the Qt Toolkit.
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##
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## $QT_BEGIN_LICENSE:LGPL$
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## Commercial License Usage
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## Licensees holding valid commercial Qt licenses may use this file in
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## accordance with the commercial license agreement provided with the
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## Software or, alternatively, in accordance with the terms contained in
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## a written agreement between you and Digia. For licensing terms and
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## conditions see http://qt.digia.com/licensing. For further information
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## use the contact form at http://qt.digia.com/contact-us.
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##
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## GNU Lesser General Public License Usage
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## Alternatively, this file may be used under the terms of the GNU Lesser
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## General Public License version 2.1 as published by the Free Software
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## Foundation and appearing in the file LICENSE.LGPL included in the
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## packaging of this file. Please review the following information to
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## ensure the GNU Lesser General Public License version 2.1 requirements
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## will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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##
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## In addition, as a special exception, Digia gives you certain additional
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## rights. These rights are described in the Digia Qt LGPL Exception
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## version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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##
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## GNU General Public License Usage
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## Alternatively, this file may be used under the terms of the GNU
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## General Public License version 3.0 as published by the Free Software
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## Foundation and appearing in the file LICENSE.GPL included in the
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## packaging of this file. Please review the following information to
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## ensure the GNU General Public License version 3.0 requirements will be
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## met: http://www.gnu.org/copyleft/gpl.html.
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##
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##
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## $QT_END_LICENSE$
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##
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#############################################################################
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if [ $# -eq 0 ]; then
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echo "usage: $0 <path to object files>"
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else
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for f in $(find $1 -name '*.o'); do
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# Skip object files without the _main symbol
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nm $f 2>/dev/null | grep -q 'T _main$' || continue
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fname=${f#$1/}
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file -b $f | grep -qi 'llvm bit-code' && \
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(cat \
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<<EOF >&2
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$f:: error: The file '$fname' contains LLVM bitcode, not object code. Automatic main() redirection could not be applied.
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note: This is most likely due to the use of link-time optimization (-flto). Please disable LTO, or work around the \
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issue by manually renaming your main() function to qtmn():
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#ifdef Q_OS_IOS
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extern "C" int qtmn(int argc, char *argv[])
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#else
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int main(int argc, char *argv[])
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#endif
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EOF
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) && exit 1
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echo "Found main() in $fname"
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strings -t d - $f | grep '_main\(\.eh\)\?$' | while read match; do
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offset=$(echo $match | cut -d ' ' -f 1)
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symbol=$(echo $match | cut -d ' ' -f 2)
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echo " Renaming '$symbol' at offset $offset to '${symbol/main/qtmn}'"
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# In-place rename the string (keeping the same length)
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printf '_qtmn' | dd of=$f bs=1 seek=$offset conv=notrunc >/dev/null 2>&1
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done
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done
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fi |