| #! /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 |