Enable building libquadmath with Intel CET

libquadmath/
	* Makefile.am: Update AM_CFLAGS.
	* Makefile.in: Regenerate:
	* acinclude.m4: Add enable.m4 and cet.m4.
	* configure: Regenerate.
	* configure.ac: Set CET_FLAGS. Update XCFLAGS.

From-SVN: r254899

1 files changed, 76 insertions, 2 deletions

diff --git a/libquadmath/configure b/libquadmath/configure
index b1dc7f38537..b32dcbc8e03 100755
--- a/libquadmath/configure
+++ b/libquadmath/configure
@@ -604,6 +604,7 @@ LIBOBJS
 get_gcc_base_ver
 GENINSRC_FALSE
 GENINSRC_TRUE
+XCFLAGS
 BUILD_LIBQUADMATH_FALSE
 BUILD_LIBQUADMATH_TRUE
 LIBQUAD_USE_SYMVER_SUN_FALSE
@@ -750,6 +751,7 @@ with_gnu_ld
 enable_libtool_lock
 enable_maintainer_mode
 enable_symvers
+enable_cet
 enable_generated_files_in_srcdir
 with_gcc_major_version_only
 '
@@ -1396,6 +1398,8 @@ Optional Features:
   --enable-maintainer-mode  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=default]
   --enable-generated-files-in-srcdir
                           put copies of generated files in source dir intended
                           for creating source tarballs for users without
@@ -10572,7 +10576,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10575 "configure"
+#line 10579 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -10678,7 +10682,7 @@ else
   lt_dlunknown=0; lt_dlno_uscore=1; lt_dlneed_uscore=2
   lt_status=$lt_dlunknown
   cat > conftest.$ac_ext <<_LT_EOF
-#line 10681 "configure"
+#line 10685 "configure"
 #include "confdefs.h"
 
 #if HAVE_DLFCN_H
@@ -12819,6 +12823,76 @@ $as_echo "#define USE_I18N_NUMBER_H 1" >>confdefs.h
 
 fi
 
+# Add CET specific flags if CET is enabled
+ # Check whether --enable-cet was given.
+if test "${enable_cet+set}" = set; then :
+  enableval=$enable_cet;
+      case "$enableval" in
+       yes|no|default) ;;
+       *) as_fn_error "Unknown argument to enable/disable cet" "$LINENO" 5 ;;
+                          esac
+
+else
+  enable_cet=default
+fi
+
+
+case "$host" in
+  i[34567]86-*-linux* | x86_64-*-linux*)
+    case "$enable_cet" in
+      default)
+	# Check if assembler supports CET.
+	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+asm ("setssbsy");
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+  enable_cet=yes
+else
+  enable_cet=no
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+	;;
+      yes)
+	# Check if assembler supports CET.
+	cat confdefs.h - <<_ACEOF >conftest.$ac_ext
+/* end confdefs.h.  */
+
+int
+main ()
+{
+asm ("setssbsy");
+  ;
+  return 0;
+}
+_ACEOF
+if ac_fn_c_try_compile "$LINENO"; then :
+
+else
+  as_fn_error "assembler with CET support is required for --enable-cet" "$LINENO" 5
+fi
+rm -f core conftest.err conftest.$ac_objext conftest.$ac_ext
+	;;
+    esac
+    ;;
+  *)
+    enable_cet=no
+    ;;
+esac
+if test x$enable_cet = xyes; then
+  CET_FLAGS="-fcf-protection -mcet"
+fi
+
+XCFLAGS="$XCFLAGS $CET_FLAGS"
+
+
 cat >confcache <<\_ACEOF
 # This file is a shell script that caches the results of configure
 # tests run on this system so they can be shared between configure