https://gcc.gnu.org/bugzilla/show_bug.cgi?id=98667
--- Comment #8 from H.J. Lu <hjl.tools at gmail dot com> ---
(In reply to Richard Biener from comment #6)
> It probably makes sense to disable CET by default when GCC is configured to
> "less" than i686-linux (definitely for i386 and i486, not sure about i586).
> Thus change the regexps in config/cet.m4 to not include those for =auto
> at least.
config/cet.m4 is OK:
ENDBR32 is NOP on SSE2 processors:
# Check if target supports multi-byte NOPs
# and if compiler and assembler support CET.
AC_COMPILE_IFELSE(
[AC_LANG_PROGRAM(
[],
[
#if !defined(__SSE2__)
#error target does not support multi-byte NOPs
#else
asm ("setssbsy");
#endif
])],
[enable_cet=yes],
[enable_cet=no])
;;
