config: Sync with GCC

[deliverable/binutils-gdb.git] / config / cet.m4

diff --git a/config/cet.m4 b/config/cet.m4
index 715f4bded19c311ea4159678cfb5862b06a255b7..23dd1f7d27d3a82eb1a85518d8ef316226918c8c 100644 (file)
--- a/config/cet.m4
+++ b/config/cet.m4
@@ -5,15 +5,24 @@ dnl
 AC_DEFUN([GCC_CET_FLAGS],[dnl
 GCC_ENABLE(cet, default, ,[enable Intel CET in target libraries],
           permit yes|no|default)
+AC_MSG_CHECKING([for CET support])
+
 case "$host" in
   i[[34567]]86-*-linux* | x86_64-*-linux*)
     case "$enable_cet" in
       default)
-       # Check if assembler supports CET.
+       # Check if target supports multi-byte NOPs
+       # and if assembler supports CET insn.
        AC_COMPILE_IFELSE(
         [AC_LANG_PROGRAM(
          [],
-         [asm ("setssbsy");])],
+         [
+#if !defined(__SSE2__)
+#error target does not support multi-byte NOPs
+#else
+asm ("setssbsy");
+#endif
+         ])],
         [enable_cet=yes],
         [enable_cet=no])
        ;;
@@ -34,5 +43,8 @@ case "$host" in
 esac
 if test x$enable_cet = xyes; then
   $1="-fcf-protection -mcet"
+  AC_MSG_RESULT([yes])
+else
+  AC_MSG_RESULT([no])
 fi
 ])