* doc/invoke.texi: Fix name of sched1 dump.

[pf3gnuchains/gcc-fork.git] / contrib / compare-debug

diff --git a/contrib/compare-debug b/contrib/compare-debug
index f1500b6..98c80f9 100755 (executable)
--- a/contrib/compare-debug
+++ b/contrib/compare-debug
@@ -2,7 +2,7 @@
 
 # Compare stripped copies of two given object files.
 
-# Copyright (C) 2007 Free Software Foundation
+# Copyright (C) 2007, 2008, 2009 Free Software Foundation
 # Originally by Alexandre Oliva <aoliva@redhat.com>
 
 # This file is part of GCC.
@@ -21,6 +21,15 @@
 # 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-debug file1.o file2.o' >&2
   exit 1
@@ -48,20 +57,104 @@ done
 
 trap 'rm -f "$1.$suf1" "$2.$suf2"' 0 1 2 15
 
-cp "$1" "$1.$suf1"
-strip "$1.$suf1"
+case `uname -s` in
+Darwin)
+  ld -S -x -r -no_uuid "$1" -o "$1.$suf1"
+  ld -S -x -r -no_uuid "$2" -o "$2.$suf2"
+  ;;
+*)
+  cp "$1" "$1.$suf1"
+  strip "$1.$suf1"
 
-cp "$2" "$2.$suf2"
-strip "$2.$suf2"
+  cp "$2" "$2.$suf2"
+  strip "$2.$suf2"
+  ;;
+esac
 
 if cmp "$1.$suf1" "$2.$suf2"; then
   status=0
 else
   status=1
+
+  # Assembler-generated CFI will add an .eh_frame section for -g not
+  # present in -g0.  Try to cope with it by checking that an .eh_frame
+  # section is present in either object file, and then stripping it
+  # off before re-comparing.
+
+  cmd=
+  cmp1=
+  cmp2=
+
+  for t in objdump readelf eu-readelf; do
+    if ($t --help) 2>&1 | grep ' --\[*section-\]*headers' > /dev/null; then
+      cmd=$t
+
+      $cmd --section-headers "$1.$suf1" | grep '\.eh_frame' > /dev/null
+      cmp1=$?
+
+      $cmd --section-headers "$2.$suf2" | grep '\.eh_frame' > /dev/null
+      cmp2=$?
+
+      break
+    fi
+  done
+
+  # If we found .eh_frame in one but not the other, or if we could not
+  # find a command to tell, try to strip off the .eh_frame section
+  # from both.
+  if test "x$cmp1" != "x$cmp2" || test "x$cmd" = "x"; then
+    suf3=$suf1.
+    while test -f "$1.$suf3"; do
+      suf3=$suf3.
+    done
+
+    suf4=$suf2.
+    while test -f "$2.$suf4"; do
+      suf4=$suf4.
+    done
+
+    trap 'rm -f "$1.$suf1" "$2.$suf2" "$1.$suf3" "$2.$suf4"' 0 1 2 15
+
+    echo stripping off .eh_frame, then retrying >&2
+
+    if (objcopy -v) 2>&1 | grep ' --remove-section' > /dev/null; then
+      objcopy --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$1.$suf1" "$1.$suf3"
+      mv "$1.$suf3" "$1.$suf1"
+
+      objcopy --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$2.$suf2" "$2.$suf4"
+      mv "$2.$suf4" "$2.$suf2"
+    elif (strip --help) 2>&1 | grep ' --remove-section' > /dev/null; then
+      cp "$1.$suf1" "$1.$suf3"
+      strip --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$1.$suf3"
+      mv "$1.$suf3" "$1.$suf1"
+
+      cp "$2.$suf2" "$2.$suf4"
+      strip --remove-section .eh_frame --remove-section .rel.eh_frame --remove-section .rela.eh_frame "$2.$suf4"
+      mv "$2.$suf4" "$2.$suf2"
+    else
+      echo failed to strip off .eh_frame >&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
+  fi
 fi
 
-rm -f "$1.$suf1" "$2.$suf2"
+$rm "$1.$suf1" "$2.$suf2"
 
 trap "exit $status; exit" 0 1 2 15
 
+if test -f "$1".gkd || test -f "$2".gkd; then
+  if cmp "$1".gkd "$2".gkd; then
+    :
+  else
+    status=$?
+  fi
+fi
+
 exit $status