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Sync config with GCC 

Sync with GCC
	2020-05-15  H.J. Lu  <hongjiu.lu@intel.com>

	PR bootstrap/95147
	* cet.m4 (GCC_CET_FLAGS): Also check if -fcf-protection works
	when defaulting to auto.

	2020-05-14  H.J. Lu  <hongjiu.lu@intel.com>

	* cet.m4 (GCC_CET_FLAGS): Change default to auto.
This commit is contained in:
H.J. Lu 2020-05-16 06:07:12 -07:00
parent 9bf058f094
commit 56770bdab2
2 changed files with 17 additions and 1 deletions
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13
config/ChangeLog
View File

@ -1,3 +1,16 @@
2020-05-16 H.J. Lu <hongjiu.lu@intel.com>
Sync with GCC
2020-05-15 H.J. Lu <hongjiu.lu@intel.com>
PR bootstrap/95147
* cet.m4 (GCC_CET_FLAGS): Also check if -fcf-protection works
when defaulting to auto.
2020-05-14 H.J. Lu <hongjiu.lu@intel.com>
* cet.m4 (GCC_CET_FLAGS): Change default to auto.
2020-05-12 H.J. Lu <hongjiu.lu@intel.com>
Sync with GCC

5
config/cet.m4
View File

@ -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.