131 lines
2.9 KiB
Text
131 lines
2.9 KiB
Text
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#! /bin/sh
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# Compare copies of two given object files.
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# Copyright (C) 2007, 2008, 2009, 2010, 2012 Free Software Foundation
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# Originally by Alexandre Oliva <aoliva@redhat.com>
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# Modified for LTO bootstrap by Richard Biener <rguenther@suse.de>
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# This file is part of GCC.
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# GCC is free software; you can redistribute it and/or modify it under
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# the terms of the GNU General Public License as published by the Free
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# Software Foundation; either version 3, or (at your option) any later
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# version.
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# GCC is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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# or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
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# License for more details.
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# You should have received a copy of the GNU General Public License
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# along with GCC; see the file COPYING3. If not see
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# <http://www.gnu.org/licenses/>.
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rm='rm -f'
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case $1 in
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-p | --preserve)
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rm='echo preserving'
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shift
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;;
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esac
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if test $# != 2; then
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echo 'usage: compare-lto file1 file2' >&2
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exit 1
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fi
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if test ! -f "$1"; then
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echo "$1" does not exist >&2
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exit 1
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fi
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if test ! -f "$2"; then
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echo "$2" does not exist >&2
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exit 1
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fi
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suf1=stripped
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while test -f "$1.$suf1"; do
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suf1=$suf1.
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done
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suf2=stripped
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while test -f "$2.$suf2"; do
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suf2=$suf2.
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done
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trap 'rm -f "$1.$suf1" "$2.$suf2"' 0 1 2 15
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if cmp "$1" "$2"; then
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status=0
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else
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status=1
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cmd=
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for t in objdump readelf eu-readelf; do
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if ($t --help) 2>&1 | grep ' --\[*section-\]*headers' > /dev/null; then
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cmd=$t
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break
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fi
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done
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# If there are LTO option sections, try to strip them off.
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if test "x$cmd" = "x" ||
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$cmd --section-headers "$1" | grep '.gnu.lto_.opts' > /dev/null ||
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$cmd --section-headers "$2" | grep '.gnu.lto_.opts' > /dev/null ; then
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echo stripping off LTO option section, then retrying >&2
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seclist=".gnu.lto_.opts"
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rsopts=`for sec in $seclist; do echo " --remove-section $sec"; done`
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if (objcopy -v) 2>&1 | grep ' --remove-section' > /dev/null; then
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objcopy $rsopts "$1" "$1.$suf1"
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objcopy $rsopts "$2" "$2.$suf2"
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elif (strip --help) 2>&1 | grep ' --remove-section' > /dev/null; then
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cp "$1" "$1.$suf1"
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strip $rsopts "$1.$suf1"
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cp "$2" "$2.$suf2"
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strip $rsopts "$2.$suf2"
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else
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echo failed to strip off LTO option section >&2
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fi
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trap 'rm -f "$1.$suf1" "$2.$suf2"' 0 1 2 15
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if cmp "$1.$suf1" "$2.$suf2"; then
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status=0
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else
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status=1
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fi
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# PE-COFF executables are timestamped so skip leading bytes for them.
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else
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case "$1" in
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*.exe)
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if cmp -i 256 "$1" "$2"; then
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status=0
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else
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status=1
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fi
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;;
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*)
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if test -f "$1.exe" && cmp -i 256 "$1.exe" "$2.exe"; then
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status=0
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else
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status=1
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fi
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;;
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esac
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fi
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fi
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$rm "$1.$suf1" "$2.$suf2"
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trap "exit $status; exit" 0 1 2 15
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exit $status
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