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.

1 files changed, 2 insertions, 2 deletions

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