f7a6d314e7
The latest fix introduced a comparison of executables and this cannot directly work on Windows because they are timestamped. Moreover nobody sets $(exeext) at top level, at least on MinGW, so you get weird behavior because some tools add the implicit .exe suffix and others do not. contrib/ PR lto/85574 * compare-lto: Deal with PE-COFF executables specifically.
131 lines
2.9 KiB
Bash
Executable File
131 lines
2.9 KiB
Bash
Executable File
#! /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
|