Sync config with GCC

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

diff --git a/config/cet.m4 b/config/cet.m4
index d9608699cd521a72e38a1e6184ffbd1862b4622b..2bb2c8a95ac1b59f83ef6376f7de7b90b077e342 100644 (file)
--- 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])
 
@@ -13,6 +13,8 @@ case "$host" in
       auto)
        # Check if target supports multi-byte NOPs
        # and if assembler supports CET insn.
+       save_CFLAGS="$CFLAGS"
+       CFLAGS="$CFLAGS -fcf-protection"
        AC_COMPILE_IFELSE(
         [AC_LANG_PROGRAM(
          [],
@@ -25,6 +27,7 @@ asm ("setssbsy");
          ])],
         [enable_cet=yes],
         [enable_cet=no])
+       CFLAGS="$save_CFLAGS"
        ;;
       yes)
        # Check if assembler supports CET.