[TCWG CI] Regression caused by binutils: Default to disabling the linker warnings about execstack and RWX segments if the target is the HPPA architecture.

[TCWG CI] Regression caused by binutils: Default to disabling the linker warnings about execstack and RWX segments if the target is the HPPA architecture.

[ci_notify]

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Subject: [TCWG CI] Regression caused by binutils: Default to disabling the
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New failures:
FAIL: gcc.dg/tree-ssa/slsr-39.c scan-tree-dump-times slsr "Replacing reference: " 4

New passes:

Re: [TCWG CI] Regression caused by binutils: Default to disabling the linker warnings about execstack and RWX segments if the target is the HPPA architecture.

[Laurent Alfonsi]

Nick, All,

It seems there's an issue in email emission. Sorry about the empty 
email. I am fixing this

By this time, here is the regression detected by our CI.
Let me know if this build failure seems not relevant to you.

Thanks
Regards,

------------------------8<------------------------8<------------------------8<------------------------

[TCWG CI] Regression caused by binutils: Default to disabling the linker warnings about execstack and RWX segments if the target is the HPPA architecture.:
commit acd65fa610df09a0954b8fecdadf546215263c5d
Author: Nick Clifton<nickc@redhat.com>

     Default to disabling the linker warnings about execstack and RWX segments if the target is the HPPA architecture.

Results regressed to
# reset_artifacts:
-10
# true:
0
# First few build errors in logs:
# 00:00:51 make[1]: *** [Makefile:8480: all-ld] Error 2
# 00:01:10 make: *** [Makefile:1004: all] Error 2

from
# reset_artifacts:
-10
# true:
0
# build_abe binutils:
1
# build_abe gcc:
2
# build_abe linux:
4
# build_abe glibc:
5
# build_abe gdb:
6

THIS IS THE END OF INTERESTING STUFF.  BELOW ARE LINKS TO BUILDS, REPRODUCTION INSTRUCTIONS, AND THE RAW COMMIT.

This commit has regressed these CI configurations:
  - tcwg_gnu_native_build/master-aarch64

First_bad build:https://ci.linaro.org/job/tcwg_gnu_native_build-bisect-master-aarch64/12/artifact/artifacts/build-acd65fa610df09a0954b8fecdadf546215263c5d/
Last_good build:https://ci.linaro.org/job/tcwg_gnu_native_build-bisect-master-aarch64/12/artifact/artifacts/build-7b97003ccdf8b6000b090c65f7493ff85dad1085/
Baseline build:https://ci.linaro.org/job/tcwg_gnu_native_build-bisect-master-aarch64/12/artifact/artifacts/build-baseline/
Even more details:https://ci.linaro.org/job/tcwg_gnu_native_build-bisect-master-aarch64/12/artifact/artifacts/

Reproduce builds:
<cut>
mkdir investigate-binutils-acd65fa610df09a0954b8fecdadf546215263c5d
cd investigate-binutils-acd65fa610df09a0954b8fecdadf546215263c5d

# Fetch scripts
git clonehttps://git.linaro.org/toolchain/jenkins-scripts

# Fetch manifests and test.sh script
mkdir -p artifacts/manifests
curl -o artifacts/manifests/build-baseline.shhttps://ci.linaro.org/job/tcwg_gnu_native_build-bisect-master-aarch64/12/artifact/artifacts/manifests/build-baseline.sh  --fail
curl -o artifacts/manifests/build-parameters.shhttps://ci.linaro.org/job/tcwg_gnu_native_build-bisect-master-aarch64/12/artifact/artifacts/manifests/build-parameters.sh  --fail
curl -o artifacts/test.shhttps://ci.linaro.org/job/tcwg_gnu_native_build-bisect-master-aarch64/12/artifact/artifacts/test.sh  --fail
chmod +x artifacts/test.sh

# Reproduce the baseline build (build all pre-requisites)
./jenkins-scripts/tcwg_gnu-build.sh @@ artifacts/manifests/build-baseline.sh

# Save baseline build state (which is then restored in artifacts/test.sh)
mkdir -p ./bisect
rsync -a --del --delete-excluded --exclude /bisect/ --exclude /artifacts/ --exclude /binutils/ ./ ./bisect/baseline/

cd binutils

# Reproduce first_bad build
git checkout --detach acd65fa610df09a0954b8fecdadf546215263c5d
../artifacts/test.sh

# Reproduce last_good build
git checkout --detach 7b97003ccdf8b6000b090c65f7493ff85dad1085
../artifacts/test.sh

cd ..
</cut>

Full commit (up to 1000 lines):
<cut>
commit acd65fa610df09a0954b8fecdadf546215263c5d
Author: Nick Clifton<nickc@redhat.com>
Date:   Tue Jun 21 11:22:38 2022 +0100

     Default to disabling the linker warnings about execstack and RWX segments if the target is the HPPA architecture.
     
             PR 29263
             * configure.ac (ac_default_ld_warn_execstack): Default to 'no' for
             HPPA targets.
             (ac_default_ld_warn_rwx_segments): Likewise.
             * configure: Regenerate.
             * testsuite/ld-elf/elf.exp: Add the --warn-execstack command line
             option to the command line when running execstack tests for the
             HPPA target.
---
  ld/ChangeLog                |  11 +++
  ld/configure                | 235 ++++++++++++++++++++++++--------------------
  ld/configure.ac             |  14 ++-
  ld/testsuite/ld-elf/elf.exp |  13 ++-
  4 files changed, 164 insertions(+), 109 deletions(-)

diff --git a/ld/ChangeLog b/ld/ChangeLog
index bcc1b3b7b56..37680ccc09a 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,14 @@
+2022-06-21  Nick Clifton<nickc@redhat.com>
+
+	PR 29263
+	* configure.ac (ac_default_ld_warn_execstack): Default to 'no' for
+	HPPA targets.
+	(ac_default_ld_warn_rwx_segments): Likewise.
+	* configure: Regenerate.
+	* testsuite/ld-elf/elf.exp: Add the --warn-execstack command line
+	option to the command line when running execstack tests for the
+	HPPA target.
+
  2022-05-12  Alan Modra<amodra@gmail.com>
  
  	PR 29006
diff --git a/ld/configure b/ld/configure
index 80db525f930..6e2c21e8ba9 100755
--- a/ld/configure
+++ b/ld/configure
@@ -727,7 +727,6 @@ am__nodep
  AMDEPBACKSLASH
  AMDEP_FALSE
  AMDEP_TRUE
-am__quote
  am__include
  DEPDIR
  OBJEXT
@@ -744,6 +743,9 @@ AM_BACKSLASH
  AM_DEFAULT_VERBOSITY
  AM_DEFAULT_V
  AM_V
+CSCOPE
+ETAGS
+CTAGS
  am__untar
  am__tar
  AMTAR
@@ -816,7 +818,8 @@ PACKAGE_VERSION
  PACKAGE_TARNAME
  PACKAGE_NAME
  PATH_SEPARATOR
-SHELL'
+SHELL
+am__quote'
  ac_subst_files=''
  ac_user_opts='
  enable_option_checking
@@ -2859,7 +2862,7 @@ test -n "$target_alias" &&
    program_prefix=${target_alias}-
  
  
-am__api_version='1.15'
+am__api_version='1.16'
  
  # Find a good install program.  We prefer a C program (faster),
  # so one script is as good as another.  But avoid the broken or
@@ -3035,12 +3038,7 @@ program_transform_name=`$as_echo "$program_transform_name" | sed "$ac_script"`
  am_aux_dir=`cd "$ac_aux_dir" && pwd`
  
  if test x"${MISSING+set}" != xset; then
-  case $am_aux_dir in
-  *\ * | *\	*)
-    MISSING="\${SHELL} \"$am_aux_dir/missing\"" ;;
-  *)
-    MISSING="\${SHELL} $am_aux_dir/missing" ;;
-  esac
+  MISSING="\${SHELL} '$am_aux_dir/missing'"
  fi
  # Use eval to expand $SHELL
  if eval "$MISSING --is-lightweight"; then
@@ -3375,8 +3373,8 @@ MAKEINFO=${MAKEINFO-"${am_missing_run}makeinfo"}
  
  # For better backward compatibility.  To be removed once Automake 1.9.x
  # dies out for good.  For more background, see:
-#<http://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
-#<http://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
+#<https://lists.gnu.org/archive/html/automake/2012-07/msg00001.html>
+#<https://lists.gnu.org/archive/html/automake/2012-07/msg00014.html>
  mkdir_p='$(MKDIR_P)'
  
  # We need awk for the "check" target (and possibly the TAP driver).  The
@@ -3395,6 +3393,20 @@ am__tar='$${TAR-tar} chof - "$$tardir"' am__untar='$${TAR-tar} xf -'
  
  
  
+# Variables for tags utilities; see am/tags.am
+if test -z "$CTAGS"; then
+  CTAGS=ctags
+fi
+
+if test -z "$ETAGS"; then
+  ETAGS=etags
+fi
+
+if test -z "$CSCOPE"; then
+  CSCOPE=cscope
+fi
+
+
  
  # POSIX will say in a future version that running "rm -f" with no argument
  # is OK; and we want to be able to make that assumption in our Makefile
@@ -3427,7 +3439,7 @@ END
  Aborting the configuration process, to ensure you take notice of the issue.
  
  You can download and install GNU coreutils to get an 'rm' implementation
-that behaves properly:<http://www.gnu.org/software/coreutils/>.
+that behaves properly:<https://www.gnu.org/software/coreutils/>.
  
  If you want to complete the configuration process using your problematic
  'rm' anyway, export the environment variable ACCEPT_INFERIOR_RM_PROGRAM
@@ -4352,45 +4364,45 @@ DEPDIR="${am__leading_dot}deps"
  
  ac_config_commands="$ac_config_commands depfiles"
  
-
-am_make=${MAKE-make}
-cat > confinc << 'END'
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking whether ${MAKE-make} supports the include directive" >&5
+$as_echo_n "checking whether ${MAKE-make} supports the include directive... " >&6; }
+cat > confinc.mk << 'END'
  am__doit:
-	@echo this is the am__doit target
+	@echo this is the am__doit target >confinc.out
  .PHONY: am__doit
  END
-# If we don't find an include directive, just comment out the code.
-{ $as_echo "$as_me:${as_lineno-$LINENO}: checking for style of include used by $am_make" >&5
-$as_echo_n "checking for style of include used by $am_make... " >&6; }
  am__include="#"
  am__quote=
-_am_result=none
-# First try GNU make style include.
-echo "include confinc" > confmf
-# Ignore all kinds of additional output from 'make'.
-case `$am_make -s -f confmf 2> /dev/null` in #(
-*the\ am__doit\ target*)
-  am__include=include
-  am__quote=
-  _am_result=GNU
-  ;;
-esac
-# Now try BSD make style include.
-if test "$am__include" = "#"; then
-   echo '.include "confinc"' > confmf
-   case `$am_make -s -f confmf 2> /dev/null` in #(
-   *the\ am__doit\ target*)
-     am__include=.include
-     am__quote="\""
-     _am_result=BSD
+# BSD make does it like this.
+echo '.include "confinc.mk" # ignored' > confmf.BSD
+# Other make implementations (GNU, Solaris 10, AIX) do it like this.
+echo 'include confinc.mk # ignored' > confmf.GNU
+_am_result=no
+for s in GNU BSD; do
+  { echo "$as_me:$LINENO: ${MAKE-make} -f confmf.$s && cat confinc.out" >&5
+   (${MAKE-make} -f confmf.$s && cat confinc.out) >&5 2>&5
+   ac_status=$?
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   (exit $ac_status); }
+  case $?:`cat confinc.out 2>/dev/null` in #(
+  '0:this is the am__doit target') :
+    case $s in #(
+  BSD) :
+    am__include='.include' am__quote='"' ;; #(
+  *) :
+    am__include='include' am__quote='' ;;
+esac ;; #(
+  *) :
       ;;
-   esac
-fi
-
-
-{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $_am_result" >&5
-$as_echo "$_am_result" >&6; }
-rm -f confinc confmf
+esac
+  if test "$am__include" != "#"; then
+    _am_result="yes ($s style)"
+    break
+  fi
+done
+rm -f confinc.* confmf.*
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: ${_am_result}" >&5
+$as_echo "${_am_result}" >&6; }
  
  # Check whether --enable-dependency-tracking was given.
  if test "${enable_dependency_tracking+set}" = set; then :
@@ -11491,7 +11503,7 @@ else
    lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
    lt_status=$lt_dlunknown
    cat > conftest.$ac_ext <<_LT_EOF
-#line 11494 "configure"
+#line 11506 "configure"
  #include "confdefs.h"
  
  #if HAVE_DLFCN_H
@@ -11597,7 +11609,7 @@ else
    lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
    lt_status=$lt_dlunknown
    cat > conftest.$ac_ext <<_LT_EOF
-#line 11600 "configure"
+#line 11612 "configure"
  #include "confdefs.h"
  
  #if HAVE_DLFCN_H
@@ -15461,7 +15473,12 @@ fi
  
  # By default warn when an executable stack is created due to object files
  # requesting such, not when the user specifies -z execstack.
-ac_default_ld_warn_execstack=2
+case "${target}" in
+  # The HPPA port needs to support older kernels that use executable stacks
+  # for signals and syscalls.
+  hppa*-*-*) ac_default_ld_warn_execstack=0 ;;
+  *) ac_default_ld_warn_execstack=2 ;;
+  esac
  # Check whether --enable-warn-execstack was given.
  if test "${enable_warn_execstack+set}" = set; then :
    enableval=$enable_warn_execstack; case "${enableval}" in
@@ -17272,7 +17289,12 @@ _ACEOF
  
  
  if test "${ac_default_ld_warn_rwx_segments}" = unset; then
-  ac_default_ld_warn_rwx_segments=1
+  case "${target}" in
+  # The HPPA's PLT section uses a constructed trampoline, hence it needs to
+  # have a RWX segment.
+  hppa*-*-*) ac_default_ld_warn_rwx_segments=0 ;;
+  *) ac_default_ld_warn_rwx_segments=1 ;;
+  esac
  fi
  
  cat >>confdefs.h <<_ACEOF
@@ -18118,7 +18140,7 @@ cat >>$CONFIG_STATUS <<_ACEOF || ac_write_fail=1
  #
  # INIT-COMMANDS
  #
-AMDEP_TRUE="$AMDEP_TRUE" ac_aux_dir="$ac_aux_dir"
+AMDEP_TRUE="$AMDEP_TRUE" MAKE="${MAKE-make}"
  
  
  # The HP-UX ksh and POSIX shell print the target directory to stdout
@@ -19102,29 +19124,35 @@ $as_echo "$as_me: executing $ac_file commands" >&6;}
    # Older Autoconf quotes --file arguments for eval, but not when files
    # are listed without --file.  Let's play safe and only enable the eval
    # if we detect the quoting.
-  case $CONFIG_FILES in
-  *\'*) eval set x "$CONFIG_FILES" ;;
-  *)   set x $CONFIG_FILES ;;
-  esac
+  # TODO: see whether this extra hack can be removed once we start
+  # requiring Autoconf 2.70 or later.
+  case $CONFIG_FILES in #(
+  *\'*) :
+    eval set x "$CONFIG_FILES" ;; #(
+  *) :
+    set x $CONFIG_FILES ;; #(
+  *) :
+     ;;
+esac
    shift
-  for mf
+  # Used to flag and report bootstrapping failures.
+  am_rc=0
+  for am_mf
    do
      # Strip MF so we end up with the name of the file.
-    mf=`echo "$mf" | sed -e 's/:.*$//'`
-    # Check whether this is an Automake generated Makefile or not.
-    # We used to match only the files named 'Makefile.in', but
-    # some people rename them; so instead we look at the file content.
-    # Grep'ing the first line is not enough: some people post-process
-    # each Makefile.in and add a new line on top of each file to say so.
-    # Grep'ing the whole file is not good either: AIX grep has a line
+    am_mf=`$as_echo "$am_mf" | sed -e 's/:.*$//'`
+    # Check whether this is an Automake generated Makefile which includes
+    # dependency-tracking related rules and includes.
+    # Grep'ing the whole file directly is not great: AIX grep has a line
      # limit of 2048, but all sed's we know have understand at least 4000.
-    if sed -n 's,^#.*generated by automake.*,X,p' "$mf" | grep X >/dev/null 2>&1; then
-      dirpart=`$as_dirname -- "$mf" ||
-$as_expr X"$mf" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
-	 X"$mf" : 'X\(//\)[^/]' \| \
-	 X"$mf" : 'X\(//\)$' \| \
-	 X"$mf" : 'X\(/\)' \| . 2>/dev/null ||
-$as_echo X"$mf" |
+    sed -n 's,^am--depfiles:.*,X,p' "$am_mf" | grep X >/dev/null 2>&1 \
+      || continue
+    am_dirpart=`$as_dirname -- "$am_mf" ||
+$as_expr X"$am_mf" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
+	 X"$am_mf" : 'X\(//\)[^/]' \| \
+	 X"$am_mf" : 'X\(//\)$' \| \
+	 X"$am_mf" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X"$am_mf" |
      sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
  	    s//\1/
  	    q
@@ -19142,53 +19170,50 @@ $as_echo X"$mf" |
  	    q
  	  }
  	  s/.*/./; q'`
-    else
-      continue
-    fi
-    # Extract the definition of DEPDIR, am__include, and am__quote
-    # from the Makefile without running 'make'.
-    DEPDIR=`sed -n 's/^DEPDIR = //p' < "$mf"`
-    test -z "$DEPDIR" && continue
-    am__include=`sed -n 's/^am__include = //p' < "$mf"`
-    test -z "$am__include" && continue
-    am__quote=`sed -n 's/^am__quote = //p' < "$mf"`
-    # Find all dependency output files, they are included files with
-    # $(DEPDIR) in their names.  We invoke sed twice because it is the
-    # simplest approach to changing $(DEPDIR) to its actual value in the
-    # expansion.
-    for file in `sed -n "
-      s/^$am__include $am__quote\(.*(DEPDIR).*\)$am__quote"'$/\1/p' <"$mf" | \
-	 sed -e 's/\$(DEPDIR)/'"$DEPDIR"'/g'`; do
-      # Make sure the directory exists.
-      test -f "$dirpart/$file" && continue
-      fdir=`$as_dirname -- "$file" ||
-$as_expr X"$file" : 'X\(.*[^/]\)//*[^/][^/]*/*$' \| \
-	 X"$file" : 'X\(//\)[^/]' \| \
-	 X"$file" : 'X\(//\)$' \| \
-	 X"$file" : 'X\(/\)' \| . 2>/dev/null ||
-$as_echo X"$file" |
-    sed '/^X\(.*[^/]\)\/\/*[^/][^/]*\/*$/{
-	    s//\1/
-	    q
-	  }
-	  /^X\(\/\/\)[^/].*/{
+    am_filepart=`$as_basename -- "$am_mf" ||
+$as_expr X/"$am_mf" : '.*/\([^/][^/]*\)/*$' \| \
+	 X"$am_mf" : 'X\(//\)$' \| \
+	 X"$am_mf" : 'X\(/\)' \| . 2>/dev/null ||
+$as_echo X/"$am_mf" |
+    sed '/^.*\/\([^/][^/]*\)\/*$/{
  	    s//\1/
  	    q
  	  }
-	  /^X\(\/\/\)$/{
+	  /^X\/\(\/\/\)$/{
  	    s//\1/
  	    q
  	  }
-	  /^X\(\/\).*/{
+	  /^X\/\(\/\).*/{
  	    s//\1/
  	    q
  	  }
  	  s/.*/./; q'`
-      as_dir=$dirpart/$fdir; as_fn_mkdir_p
-      # echo "creating $dirpart/$file"
-      echo '# dummy' > "$dirpart/$file"
-    done
+    { echo "$as_me:$LINENO: cd "$am_dirpart" \
+      && sed -e '/# am--include-marker/d' "$am_filepart" \
+        | $MAKE -f - am--depfiles" >&5
+   (cd "$am_dirpart" \
+      && sed -e '/# am--include-marker/d' "$am_filepart" \
+        | $MAKE -f - am--depfiles) >&5 2>&5
+   ac_status=$?
+   echo "$as_me:$LINENO: \$? = $ac_status" >&5
+   (exit $ac_status); } || am_rc=$?
    done
+  if test $am_rc -ne 0; then
+    { { $as_echo "$as_me:${as_lineno-$LINENO}: error: in \`$ac_pwd':" >&5
+$as_echo "$as_me: error: in \`$ac_pwd':" >&2;}
+as_fn_error $? "Something went wrong bootstrapping makefile fragments
+    for automatic dependency tracking.  If GNU make was not used, consider
+    re-running the configure script with MAKE=\"gmake\" (or whatever is
+    necessary).  You can also try re-running configure with the
+    '--disable-dependency-tracking' option to at least be able to build
+    the package (albeit without support for automatic dependency tracking).
+See \`config.log' for more details" "$LINENO" 5; }
+  fi
+  { am_dirpart=; unset am_dirpart;}
+  { am_filepart=; unset am_filepart;}
+  { am_mf=; unset am_mf;}
+  { am_rc=; unset am_rc;}
+  rm -f conftest-deps.mk
  }
   ;;
      "libtool":C)
diff --git a/ld/configure.ac b/ld/configure.ac
index 4331d6b1302..d587c46cc51 100644
--- a/ld/configure.ac
+++ b/ld/configure.ac
@@ -206,7 +206,12 @@ esac])
  
  # By default warn when an executable stack is created due to object files
  # requesting such, not when the user specifies -z execstack.
-ac_default_ld_warn_execstack=2
+[case "${target}" in
+  # The HPPA port needs to support older kernels that use executable stacks
+  # for signals and syscalls.
+  hppa*-*-*) ac_default_ld_warn_execstack=0 ;;
+  *) ac_default_ld_warn_execstack=2 ;;
+  esac]
  AC_ARG_ENABLE(warn-execstack,
  	      AS_HELP_STRING([--enable-warn-execstack],
  	      [enable warnings when creating an executable stack]),
@@ -564,7 +569,12 @@ AC_DEFINE_UNQUOTED(DEFAULT_LD_WARN_EXECSTACK,
    [Define to 1 if you want to enable --warn-execstack in ELF linker by default.])
  
  if test "${ac_default_ld_warn_rwx_segments}" = unset; then
-  ac_default_ld_warn_rwx_segments=1
+  [case "${target}" in
+  # The HPPA's PLT section uses a constructed trampoline, hence it needs to
+  # have a RWX segment.
+  hppa*-*-*) ac_default_ld_warn_rwx_segments=0 ;;
+  *) ac_default_ld_warn_rwx_segments=1 ;;
+  esac]
  fi
  AC_DEFINE_UNQUOTED(DEFAULT_LD_WARN_RWX_SEGMENTS,
    $ac_default_ld_warn_rwx_segments,
diff --git a/ld/testsuite/ld-elf/elf.exp b/ld/testsuite/ld-elf/elf.exp
index abc35f80778..c73c2a81545 100644
--- a/ld/testsuite/ld-elf/elf.exp
+++ b/ld/testsuite/ld-elf/elf.exp
@@ -236,10 +236,19 @@ if {   [istarget *-*-*linux*]
      proc prune_warnings_extra { text } {
  	return $text
      }
-
+
+    # The HPPA target disables the warnings by default since it needs an
+    # executable stack to support older kernels and an RWX segment to
+    # support its PLT.
+    if { [istarget "hppa*-*-*"] } {
+        set extra_link_opts "--warn-execstack --warn-rwx-segments"
+    } else {
+        set extra_link_opts ""
+    }
+
      run_ld_link_tests [list \
  	[list "PR ld/29072 (warn about an executable .note.GNU-stack)" \
-	    "-e 0" \
+	    "-e 0 $extra_link_opts" \
  	    "" \
  	    "" \
  	    {pr29072-a.s} \
</cut>