x86: Default CET run-time support to auto

CET has been added since GCC 8.  This patch defaults CET run-time support
to auto.  It enables CET run-time support if asssembler supports CET
instructions and multi-byte NOPs are enabled via SSE2.

config/

	* cet.m4 (GCC_CET_FLAGS): Change default to auto.

gcc/

	* configure: Regenerated.

libatomic/

	* configure: Regenerated.

libbacktrace/

	* configure: Regenerated.

libcc1/

	* configure: Regenerated.

libcpp/

	* configure: Regenerated.

libdecnumber/

	* configure: Regenerated.

libgcc/

	* configure: Regenerated.

libgfortran/

	* configure: Regenerated.

libgomp/

	* configure: Regenerated.

libitm/

	* configure: Regenerated.

libobjc/

	* configure: Regenerated.

libquadmath/

	* configure: Regenerated.

libsanitizer/

	* configure: Regenerated.

libssp/

	* configure: Regenerated.

libstdc++-v3/

	* configure: Regenerated.

libvtv/

	* configure: Regenerated.

zlib/

	* configure: Regenerated.

36 files changed, 274 insertions, 51 deletions

diff --git a/config/ChangeLog b/config/ChangeLog
index 8a8b2cb..d36c5bb 100644
--- a/config/ChangeLog
+++ b/config/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* cet.m4 (GCC_CET_FLAGS): Change default to auto.
+
 2020-05-12  H.J. Lu  <hongjiu.lu@intel.com>
 
 	PR bootstrap/94998
diff --git a/config/cet.m4 b/config/cet.m4
index d960869..63c6ea9 100644
--- a/config/cet.m4
+++ b/config/cet.m4
@@ -3,7 +3,7 @@ dnl GCC_CET_FLAGS
 dnl    (SHELL-CODE_HANDLER)
 dnl
 AC_DEFUN([GCC_CET_FLAGS],[dnl
-GCC_ENABLE(cet, no, ,[enable Intel CET in target libraries],
+GCC_ENABLE(cet, auto, ,[enable Intel CET in target libraries],
 	   permit yes|no|auto)
 AC_MSG_CHECKING([for CET support])
 
diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 156fd6c..97e48e4 100644
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-05-14  Christophe Lyon  <christophe.lyon@linaro.org>
 
 	* config/arm/arm.c (reg_needs_saving_p): New function.
diff --git a/gcc/configure b/gcc/configure
index 3156db7..8f0f674 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -30839,7 +30839,8 @@ rm -f core conftest.err conftest.$ac_objext \
 fi
 
 if test x$may_have_cet = xyes; then
-  if test "$cross_compiling" = yes; then :
+  if test x$cross_compiling = xno; then
+    if test "$cross_compiling" = yes; 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 $? "cannot run test program while cross compiling
@@ -30884,9 +30885,14 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
-  if test x$enable_cet = xno -a x$have_cet = xyes; then
-    as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+    if test x$enable_cet = xno -a x$have_cet = xyes; then
+      as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+    fi
   fi
+else
+  # Enable CET in cross compiler if possible so that it will run on both
+  # CET and non-CET hosts.
+  have_cet=yes
 fi
 if test x$enable_cet = xyes; then
   CET_HOST_FLAGS="-fcf-protection"
diff --git a/libatomic/ChangeLog b/libatomic/ChangeLog
index e8ab8ec..38d5ef3 100644
--- a/libatomic/ChangeLog
+++ b/libatomic/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-05-06  Uroš Bizjak  <ubizjak@gmail.com>
 
 	* config/x86/fenv.c (__math_force_eval): Remove.
diff --git a/libatomic/configure b/libatomic/configure
index 3e2f2ff4..c4b4714 100755
--- a/libatomic/configure
+++ b/libatomic/configure
@@ -1455,7 +1455,7 @@ Optional Features:
                           sometimes confusing) to the casual installer
   --enable-symvers=STYLE  enables symbol versioning of the shared library
                           [default=yes]
-  --enable-cet            enable Intel CET in target libraries [default=no]
+  --enable-cet            enable Intel CET in target libraries [default=auto]
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -15582,7 +15582,7 @@ if test "${enable_cet+set}" = set; then :
                           esac
 
 else
-  enable_cet=no
+  enable_cet=auto
 fi
 
 
diff --git a/libbacktrace/ChangeLog b/libbacktrace/ChangeLog
index 0fa4bbb..81fa56e 100644
--- a/libbacktrace/ChangeLog
+++ b/libbacktrace/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-05-13  Ian Lance Taylor  <iant@golang.org>
 
 	* ztest.c (test_large): Mark state ATTRIBUTE_UNUSED.
diff --git a/libbacktrace/configure b/libbacktrace/configure
index b72380e..95d06c6 100755
--- a/libbacktrace/configure
+++ b/libbacktrace/configure
@@ -1436,7 +1436,7 @@ Optional Features:
                           optimize for fast installation [default=yes]
   --disable-libtool-lock  avoid locking (might break parallel builds)
   --disable-largefile     omit support for large files
-  --enable-cet            enable Intel CET in target libraries [default=no]
+  --enable-cet            enable Intel CET in target libraries [default=auto]
   --enable-host-shared    build host code as shared libraries
   --enable-cet            enable Intel CET in host libraries [default=auto]
 
@@ -12156,7 +12156,7 @@ if test "${enable_cet+set}" = set; then :
                           esac
 
 else
-  enable_cet=no
+  enable_cet=auto
 fi
 
 
@@ -12486,7 +12486,8 @@ rm -f core conftest.err conftest.$ac_objext \
 fi
 
 if test x$may_have_cet = xyes; then
-  if test "$cross_compiling" = yes; then :
+  if test x$cross_compiling = xno; then
+    if test "$cross_compiling" = yes; 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 $? "cannot run test program while cross compiling
@@ -12531,9 +12532,14 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
-  if test x$enable_cet = xno -a x$have_cet = xyes; then
-    as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+    if test x$enable_cet = xno -a x$have_cet = xyes; then
+      as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+    fi
   fi
+else
+  # Enable CET in cross compiler if possible so that it will run on both
+  # CET and non-CET hosts.
+  have_cet=yes
 fi
 if test x$enable_cet = xyes; then
   CET_HOST_FLAGS="-fcf-protection"
diff --git a/libcc1/ChangeLog b/libcc1/ChangeLog
index e31ca9c..24d3246 100644
--- a/libcc1/ChangeLog
+++ b/libcc1/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-05-12  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* Makefile.am (AM_CXXFLAGS): Add $(CET_HOST_FLAGS).
diff --git a/libcc1/configure b/libcc1/configure
index 76377a2..5e790db 100755
--- a/libcc1/configure
+++ b/libcc1/configure
@@ -14619,10 +14619,35 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     ;;
 esac
 
+save_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -fcf-protection=none"
+save_LDFLAGS="$LDFLAGS"
+LDFLAGS="$LDFLAGS -Wl,-z,ibt,-z,shstk"
 if test x$may_have_cet = xyes; then
-  save_LDFLAGS="$LDFLAGS"
-  LDFLAGS="$LDFLAGS -Wl,-z,ibt,-z,shstk"
-  if test "$cross_compiling" = yes; then :
+  # Check whether -fcf-protection=none -Wl,-z,ibt,-z,shstk work.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  may_have_cet=yes
+else
+  may_have_cet=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+
+if test x$may_have_cet = xyes; then
+  if test x$cross_compiling = xno; then
+    if test "$cross_compiling" = yes; 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 $? "cannot run test program while cross compiling
@@ -14667,10 +14692,14 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
-  LDFLAGS="$save_LDFLAGS"
-  if test x$enable_cet = xno -a x$have_cet = xyes; then
-    as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+    if test x$enable_cet = xno -a x$have_cet = xyes; then
+      as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+    fi
   fi
+else
+  # Enable CET in cross compiler if possible so that it will run on both
+  # CET and non-CET hosts.
+  have_cet=yes
 fi
 if test x$enable_cet = xyes; then
   CET_HOST_FLAGS="-fcf-protection"
@@ -14680,6 +14709,8 @@ else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
+CFLAGS="$save_CFLAGS"
+LDFLAGS="$save_LDFLAGS"
 
 
 
diff --git a/libcpp/ChangeLog b/libcpp/ChangeLog
index f425bac..a802408 100644
--- a/libcpp/ChangeLog
+++ b/libcpp/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-05-13  Jason Merrill  <jason@redhat.com>
 
 	* include/cpplib.h (enum c_lang): Change CXX2A to CXX20.
diff --git a/libcpp/configure b/libcpp/configure
index 64bbf54..7f02d6b 100755
--- a/libcpp/configure
+++ b/libcpp/configure
@@ -7525,10 +7525,35 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     ;;
 esac
 
+save_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -fcf-protection=none"
+save_LDFLAGS="$LDFLAGS"
+LDFLAGS="$LDFLAGS -Wl,-z,ibt,-z,shstk"
 if test x$may_have_cet = xyes; then
-  save_LDFLAGS="$LDFLAGS"
-  LDFLAGS="$LDFLAGS -Wl,-z,ibt,-z,shstk"
-  if test "$cross_compiling" = yes; then :
+  # Check whether -fcf-protection=none -Wl,-z,ibt,-z,shstk work.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  may_have_cet=yes
+else
+  may_have_cet=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+
+if test x$may_have_cet = xyes; then
+  if test x$cross_compiling = xno; then
+    if test "$cross_compiling" = yes; 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 $? "cannot run test program while cross compiling
@@ -7573,10 +7598,14 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
-  LDFLAGS="$save_LDFLAGS"
-  if test x$enable_cet = xno -a x$have_cet = xyes; then
-    as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+    if test x$enable_cet = xno -a x$have_cet = xyes; then
+      as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+    fi
   fi
+else
+  # Enable CET in cross compiler if possible so that it will run on both
+  # CET and non-CET hosts.
+  have_cet=yes
 fi
 if test x$enable_cet = xyes; then
   CET_HOST_FLAGS="-fcf-protection"
@@ -7586,6 +7615,8 @@ else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
+CFLAGS="$save_CFLAGS"
+LDFLAGS="$save_LDFLAGS"
 
 case x$enable_languages in
 *jit*)
diff --git a/libdecnumber/ChangeLog b/libdecnumber/ChangeLog
index 6bdc757..75627e4 100644
--- a/libdecnumber/ChangeLog
+++ b/libdecnumber/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-05-12  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* Makefile.in (CET_HOST_FLAGS): New.
diff --git a/libdecnumber/configure b/libdecnumber/configure
index b454278..c2c8040 100755
--- a/libdecnumber/configure
+++ b/libdecnumber/configure
@@ -1904,6 +1904,52 @@ rm -f conftest.val
   as_fn_set_status $ac_retval
 
 } # ac_fn_c_compute_int
+
+# ac_fn_c_try_link LINENO
+# -----------------------
+# Try to link conftest.$ac_ext, and return whether this succeeded.
+ac_fn_c_try_link ()
+{
+  as_lineno=${as_lineno-"$1"} as_lineno_stack=as_lineno_stack=$as_lineno_stack
+  rm -f conftest.$ac_objext conftest$ac_exeext
+  if { { ac_try="$ac_link"
+case "(($ac_try" in
+  *\"* | *\`* | *\\*) ac_try_echo=\$ac_try;;
+  *) ac_try_echo=$ac_try;;
+esac
+eval ac_try_echo="\"\$as_me:${as_lineno-$LINENO}: $ac_try_echo\""
+$as_echo "$ac_try_echo"; } >&5
+  (eval "$ac_link") 2>conftest.err
+  ac_status=$?
+  if test -s conftest.err; then
+    grep -v '^ *+' conftest.err >conftest.er1
+    cat conftest.er1 >&5
+    mv -f conftest.er1 conftest.err
+  fi
+  $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+  test $ac_status = 0; } && {
+	 test -z "$ac_c_werror_flag" ||
+	 test ! -s conftest.err
+       } && test -s conftest$ac_exeext && {
+	 test "$cross_compiling" = yes ||
+	 test -x conftest$ac_exeext
+       }; then :
+  ac_retval=0
+else
+  $as_echo "$as_me: failed program was:" >&5
+sed 's/^/| /' conftest.$ac_ext >&5
+
+	ac_retval=1
+fi
+  # Delete the IPA/IPO (Inter Procedural Analysis/Optimization) information
+  # created by the PGI compiler (conftest_ipa8_conftest.oo), as it would
+  # interfere with the next link command; also delete a directory that is
+  # left behind by Apple's compiler.  We do this before executing the actions.
+  rm -rf conftest.dSYM conftest_ipa8_conftest.oo
+  eval $as_lineno_stack; ${as_lineno_stack:+:} unset as_lineno
+  as_fn_set_status $ac_retval
+
+} # ac_fn_c_try_link
 cat >config.log <<_ACEOF
 This file contains any messages produced by compilers while
 running configure, to aid debugging if configure makes a mistake.
@@ -5132,10 +5178,35 @@ rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
     ;;
 esac
 
+save_CFLAGS="$CFLAGS"
+CFLAGS="$CFLAGS -fcf-protection=none"
+save_LDFLAGS="$LDFLAGS"
+LDFLAGS="$LDFLAGS -Wl,-z,ibt,-z,shstk"
 if test x$may_have_cet = xyes; then
-  save_LDFLAGS="$LDFLAGS"
-  LDFLAGS="$LDFLAGS -Wl,-z,ibt,-z,shstk"
-  if test "$cross_compiling" = yes; then :
+  # Check whether -fcf-protection=none -Wl,-z,ibt,-z,shstk work.
+  cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+return 0;
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_link "$LINENO"; then :
+  may_have_cet=yes
+else
+  may_have_cet=no
+fi
+rm -f core conftest.err conftest.$ac_objext \
+    conftest$ac_exeext conftest.$ac_ext
+fi
+
+if test x$may_have_cet = xyes; then
+  if test x$cross_compiling = xno; then
+    if test "$cross_compiling" = yes; 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 $? "cannot run test program while cross compiling
@@ -5180,10 +5251,14 @@ rm -f core *.core core.conftest.* gmon.out bb.out conftest$ac_exeext \
   conftest.$ac_objext conftest.beam conftest.$ac_ext
 fi
 
-  LDFLAGS="$save_LDFLAGS"
-  if test x$enable_cet = xno -a x$have_cet = xyes; then
-    as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+    if test x$enable_cet = xno -a x$have_cet = xyes; then
+      as_fn_error $? "Intel CET must be enabled on Intel CET enabled host" "$LINENO" 5
+    fi
   fi
+else
+  # Enable CET in cross compiler if possible so that it will run on both
+  # CET and non-CET hosts.
+  have_cet=yes
 fi
 if test x$enable_cet = xyes; then
   CET_HOST_FLAGS="-fcf-protection"
@@ -5193,6 +5268,8 @@ else
   { $as_echo "$as_me:${as_lineno-$LINENO}: result: no" >&5
 $as_echo "no" >&6; }
 fi
+CFLAGS="$save_CFLAGS"
+LDFLAGS="$save_LDFLAGS"
 
 case x$enable_languages in
 *jit*)
diff --git a/libgcc/ChangeLog b/libgcc/ChangeLog
index 8ae4c7f..b0a432f 100644
--- a/libgcc/ChangeLog
+++ b/libgcc/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-05-09  Hans-Peter Nilsson  <hp@axis.com>
 
 	* config.host: Remove support for crisv32-*-* and cris*-*-linux.
diff --git a/libgcc/configure b/libgcc/configure
index 26bf757..a5d5ab8 100755
--- a/libgcc/configure
+++ b/libgcc/configure
@@ -1353,7 +1353,7 @@ Optional Features:
 			enable decimal float extension to C.  Selecting 'bid'
 			or 'dpd' choses which decimal floating point format
 			to use
-  --enable-cet            enable Intel CET in target libraries [default=no]
+  --enable-cet            enable Intel CET in target libraries [default=auto]
   --enable-explicit-exception-frame-registration
                           register exception tables explicitly at module
                           start, for use e.g. for compatibility with
@@ -4900,7 +4900,7 @@ if test "${enable_cet+set}" = set; then :
                           esac
 
 else
-  enable_cet=no
+  enable_cet=auto
 fi
 
 
diff --git a/libgfortran/ChangeLog b/libgfortran/ChangeLog
index 94c7e0f..1cbdaf3 100644
--- a/libgfortran/ChangeLog
+++ b/libgfortran/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-05-06  Uroš Bizjak  <ubizjak@gmail.com>
 
 	* config/fpu-387.h (__math_force_eval): Remove.
diff --git a/libgfortran/configure b/libgfortran/configure
index b4cf854..3c8be06 100755
--- a/libgfortran/configure
+++ b/libgfortran/configure
@@ -1466,7 +1466,7 @@ Optional Features:
                           do not reject slow dependency extractors
   --disable-dependency-tracking
                           speeds up one-time build
-  --enable-cet            enable Intel CET in target libraries [default=no]
+  --enable-cet            enable Intel CET in target libraries [default=auto]
   --disable-symvers       disable symbol versioning for libgfortran
   --enable-shared[=PKGS]  build shared libraries [default=yes]
   --enable-static[=PKGS]  build static libraries [default=yes]
@@ -6001,7 +6001,7 @@ if test "${enable_cet+set}" = set; then :
                           esac
 
 else
-  enable_cet=no
+  enable_cet=auto
 fi
 
 
diff --git a/libgomp/ChangeLog b/libgomp/ChangeLog
index 4bfce69..8a66266 100644
--- a/libgomp/ChangeLog
+++ b/libgomp/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-05-14  Jakub Jelinek  <jakub@redhat.com>
 
 	* testsuite/libgomp.c-c++-common/target-40.c: New test.
diff --git a/libgomp/configure b/libgomp/configure
index d8d98f1..4a0e149 100755
--- a/libgomp/configure
+++ b/libgomp/configure
@@ -1501,7 +1501,7 @@ Optional Features:
   --enable-tls            Use thread-local storage [default=yes]
   --enable-symvers=STYLE  enables symbol versioning of the shared library
                           [default=yes]
-  --enable-cet            enable Intel CET in target libraries [default=no]
+  --enable-cet            enable Intel CET in target libraries [default=auto]
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -16740,7 +16740,7 @@ if test "${enable_cet+set}" = set; then :
                           esac
 
 else
-  enable_cet=no
+  enable_cet=auto
 fi
 
 
diff --git a/libitm/ChangeLog b/libitm/ChangeLog
index 295fb94..3c38411 100644
--- a/libitm/ChangeLog
+++ b/libitm/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-05-12  Nathan Sidwell  <nathan@acm.org>
 
 	Fix throw specifiers on interface.
diff --git a/libitm/configure b/libitm/configure
index 97db1bc..2c451fb0 100755
--- a/libitm/configure
+++ b/libitm/configure
@@ -1468,7 +1468,7 @@ Optional Features:
   --enable-tls            Use thread-local storage [default=yes]
   --enable-symvers=STYLE  enables symbol versioning of the shared library
                           [default=yes]
-  --enable-cet            enable Intel CET in target libraries [default=no]
+  --enable-cet            enable Intel CET in target libraries [default=auto]
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -17877,7 +17877,7 @@ if test "${enable_cet+set}" = set; then :
                           esac
 
 else
-  enable_cet=no
+  enable_cet=auto
 fi
 
 
diff --git a/libobjc/ChangeLog b/libobjc/ChangeLog
index b5bba60..accabfb 100644
--- a/libobjc/ChangeLog
+++ b/libobjc/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-02-12  Sandra Loosemore  <sandra@codesourcery.com>
 
 	PR libstdc++/79193
diff --git a/libobjc/configure b/libobjc/configure
index 2f8924e..018c9db 100755
--- a/libobjc/configure
+++ b/libobjc/configure
@@ -1383,7 +1383,7 @@ Optional Features:
   --enable-FEATURE[=ARG]  include FEATURE [ARG=yes]
   --enable-version-specific-runtime-libs    Specify that runtime libraries should be installed in a compiler-specific directory
   --enable-multilib       build many library versions (default)
-  --enable-cet            enable Intel CET in target libraries [default=no]
+  --enable-cet            enable Intel CET in target libraries [default=auto]
   --enable-maintainer-mode
                           enable make rules and dependencies not useful (and
                           sometimes confusing) to the casual installer
@@ -3453,7 +3453,7 @@ if test "${enable_cet+set}" = set; then :
                           esac
 
 else
-  enable_cet=no
+  enable_cet=auto
 fi
 
 
diff --git a/libquadmath/ChangeLog b/libquadmath/ChangeLog
index 2df546a..fbb548e 100644
--- a/libquadmath/ChangeLog
+++ b/libquadmath/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-02-12  Sandra Loosemore  <sandra@codesourcery.com>
 
 	PR libstdc++/79193
diff --git a/libquadmath/configure b/libquadmath/configure
index 7b45eb7..d995a2c 100755
--- a/libquadmath/configure
+++ b/libquadmath/configure
@@ -1439,7 +1439,7 @@ Optional Features:
                           enable make rules and dependencies not useful (and
                           sometimes confusing) to the casual installer
   --disable-symvers       disable symbol versioning for libquadmath
-  --enable-cet            enable Intel CET in target libraries [default=no]
+  --enable-cet            enable Intel CET in target libraries [default=auto]
   --enable-generated-files-in-srcdir
                           put copies of generated files in source dir intended
                           for creating source tarballs for users without
@@ -13026,7 +13026,7 @@ if test "${enable_cet+set}" = set; then :
                           esac
 
 else
-  enable_cet=no
+  enable_cet=auto
 fi
 
 
diff --git a/libsanitizer/ChangeLog b/libsanitizer/ChangeLog
index 1340185..7bb6269 100644
--- a/libsanitizer/ChangeLog
+++ b/libsanitizer/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-05-01  Andreas Tobler  <andreast@gcc.gnu.org>
 
 	* configure.tgt: Add x86_64- and i?86-*-freebsd* targets.
diff --git a/libsanitizer/configure b/libsanitizer/configure
index 0c56bdf..8d1aa6d 100755
--- a/libsanitizer/configure
+++ b/libsanitizer/configure
@@ -1466,7 +1466,7 @@ Optional Features:
   --enable-fast-install[=PKGS]
                           optimize for fast installation [default=yes]
   --disable-libtool-lock  avoid locking (might break parallel builds)
-  --enable-cet            enable Intel CET in target libraries [default=no]
+  --enable-cet            enable Intel CET in target libraries [default=auto]
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -16849,7 +16849,7 @@ if test "${enable_cet+set}" = set; then :
                           esac
 
 else
-  enable_cet=no
+  enable_cet=auto
 fi
 
 
diff --git a/libssp/ChangeLog b/libssp/ChangeLog
index 9e3e6a6..43fe3fe 100644
--- a/libssp/ChangeLog
+++ b/libssp/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-02-12  Sandra Loosemore  <sandra@codesourcery.com>
 
 	PR libstdc++/79193
diff --git a/libssp/configure b/libssp/configure
index dd3b41d..7e54b16 100755
--- a/libssp/configure
+++ b/libssp/configure
@@ -1419,7 +1419,7 @@ Optional Features:
                           do not reject slow dependency extractors
   --disable-dependency-tracking
                           speeds up one-time build
-  --enable-cet            enable Intel CET in target libraries [default=no]
+  --enable-cet            enable Intel CET in target libraries [default=auto]
   --disable-symvers       disable symbol versioning for libssp
   --enable-shared[=PKGS]  build shared libraries [default=yes]
   --enable-static[=PKGS]  build static libraries [default=yes]
@@ -4325,7 +4325,7 @@ if test "${enable_cet+set}" = set; then :
                           esac
 
 else
-  enable_cet=no
+  enable_cet=auto
 fi
 
 
diff --git a/libstdc++-v3/ChangeLog b/libstdc++-v3/ChangeLog
index 0148ded..a6f5d6f 100644
--- a/libstdc++-v3/ChangeLog
+++ b/libstdc++-v3/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-05-13  Alexandre Oliva <oliva@adacore.com>
 
 	PR libstdc++/77691
diff --git a/libstdc++-v3/configure b/libstdc++-v3/configure
index 9f9c5a2..24cc51c 100755
--- a/libstdc++-v3/configure
+++ b/libstdc++-v3/configure
@@ -1643,7 +1643,7 @@ Optional Features:
                           enable C++11 threads support [default=auto]
   --enable-libstdcxx-filesystem-ts
                           turns on ISO/IEC TS 18822 support [default=auto]
-  --enable-cet            enable Intel CET in target libraries [default=no]
+  --enable-cet            enable Intel CET in target libraries [default=auto]
   --enable-version-specific-runtime-libs
                           Specify that runtime libraries should be installed
                           in a compiler-specific directory
@@ -77475,7 +77475,7 @@ if test "${enable_cet+set}" = set; then :
                           esac
 
 else
-  enable_cet=no
+  enable_cet=auto
 fi
 
 
diff --git a/libvtv/ChangeLog b/libvtv/ChangeLog
index c0b6878..96c417c 100644
--- a/libvtv/ChangeLog
+++ b/libvtv/ChangeLog
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-01-24  Maciej W. Rozycki  <macro@wdc.com>
 
 	* configure.ac: Handle `--with-toolexeclibdir='.
diff --git a/libvtv/configure b/libvtv/configure
index fc96952..9d42cb8 100755
--- a/libvtv/configure
+++ b/libvtv/configure
@@ -1446,7 +1446,7 @@ Optional Features:
   --enable-fast-install[=PKGS]
                           optimize for fast installation [default=yes]
   --disable-libtool-lock  avoid locking (might break parallel builds)
-  --enable-cet            enable Intel CET in target libraries [default=no]
+  --enable-cet            enable Intel CET in target libraries [default=auto]
 
 Optional Packages:
   --with-PACKAGE[=ARG]    use PACKAGE [ARG=yes]
@@ -15667,7 +15667,7 @@ if test "${enable_cet+set}" = set; then :
                           esac
 
 else
-  enable_cet=no
+  enable_cet=auto
 fi
 
 
diff --git a/zlib/ChangeLog.gcj b/zlib/ChangeLog.gcj
index c1d24fe..1057533 100644
--- a/zlib/ChangeLog.gcj
+++ b/zlib/ChangeLog.gcj
@@ -1,3 +1,7 @@
+2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>
+
+	* configure: Regenerated.
+
 2020-05-12  H.J. Lu  <hongjiu.lu@intel.com>
 
 	* Makefile.am (AM_CFLAGS): New.
diff --git a/zlib/configure b/zlib/configure
index 51a6ef3..65005f1 100755
--- a/zlib/configure
+++ b/zlib/configure
@@ -1413,7 +1413,7 @@ Optional Features:
                           do not reject slow dependency extractors
   --disable-dependency-tracking
                           speeds up one-time build
-  --enable-cet            enable Intel CET in target libraries [default=no]
+  --enable-cet            enable Intel CET in target libraries [default=auto]
   --enable-shared[=PKGS]  build shared libraries [default=yes]
   --enable-static[=PKGS]  build static libraries [default=yes]
   --enable-fast-install[=PKGS]
@@ -4156,7 +4156,7 @@ if test "${enable_cet+set}" = set; then :
                           esac
 
 else
-  enable_cet=no
+  enable_cet=auto
 fi