https://gcc.gnu.org/bugzilla/show_bug.cgi?id=84148
--- Comment #13 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to igor.v.tsimbalist from comment #11)
> Created attachment 43408 [details]
> patch #2
case "$host" in
- i[[34567]]86-*-linux* | x86_64-*-linux*)
- case "$enable_cet" in
- default)
- # Check if assembler supports CET.
- AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM(
- [],
- [asm ("setssbsy");])],
- [enable_cet=yes],
- [enable_cet=no])
- ;;
- yes)
- # Check if assembler supports CET.
- AC_COMPILE_IFELSE(
- [AC_LANG_PROGRAM(
+AC_MSG_CHECKING([for CET support])
+
+# Adjust the default value.
+if test x$enable_cet = xdefault; then
+ case "$host" in
+ i[[34567]]86-*-linux* | x86_64-*-linux*)
+ # Check if processor supports multi-byte NOPs.
+ AC_COMPILE_IFELSE(
+ [AC_LANG_PROGRAM(
+ [
+#if !defined(__SSE2__)
+#error compiler does not support multi-byte NOPs
^^^^^^^^ Change it to target. Please simply merge it with
asm ("setssbsy");
Just do
#if !defined(__SSE2__)
#error target does not support multi-byte NOPs
#else
asm ("setssbsy");
#endif
+#endif
+ ],
+ [])],
+ [enable_cet=yes],
+ [enable_cet=no])
+ ;;
+ *)
+ enable_cet=no
+ ;;
+ esac
+fi
