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