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config: Sync with GCC 

Sync with GCC
	2018-04-05  H.J. Lu  <hongjiu.lu@intel.com>

	PR gas/22318
	* plugins.m4 (AC_PLUGINS): Use dlsym to check if libdl is needed.

	2018-02-14  Igor Tsimbalist  <igor.v.tsimbalist@intel.com>

	PR target/84148
	* cet.m4: Check if target support multi-byte NOPS (SSE).
This commit is contained in:
H.J. Lu 2018-04-05 15:22:13 -07:00
parent c54b27d1c0
commit 552d4da417
3 changed files with 28 additions and 3 deletions
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13
config/ChangeLog
View File

@ -1,3 +1,16 @@
2018-04-05 H.J. Lu <hongjiu.lu@intel.com>
Sync with GCC
2018-04-05 H.J. Lu <hongjiu.lu@intel.com>
PR gas/22318
* plugins.m4 (AC_PLUGINS): Use dlsym to check if libdl is needed.
2018-02-14 Igor Tsimbalist <igor.v.tsimbalist@intel.com>
PR target/84148
* cet.m4: Check if target support multi-byte NOPS (SSE).
2018-02-06 Eric Botcazou <ebotcazou@adacore.com>
* gcc-plugin.m4 (GCC_ENABLE_PLUGINS): Remove -q option passed to grep.

16
config/cet.m4
View File

@ -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
])

2
config/plugins.m4
View File

@ -16,6 +16,6 @@ AC_DEFUN([AC_PLUGINS],
[plugins=$maybe_plugins]
)
if test "$plugins" = "yes"; then
AC_SEARCH_LIBS([dlopen], [dl])
AC_SEARCH_LIBS([dlsym], [dl])
fi
])