cet.m4 revision 1.1.1.1 
1dnl
2dnl GCC_CET_FLAGS
3dnl    (SHELL-CODE_HANDLER)
4dnl
5AC_DEFUN([GCC_CET_FLAGS],[dnl
6GCC_ENABLE(cet, default, ,[enable Intel CET in target libraries],
7	   permit yes|no|default)
8case "$host" in
9  i[[34567]]86-*-linux* | x86_64-*-linux*)
10    case "$enable_cet" in
11      default)
12	# Check if assembler supports CET.
13	AC_COMPILE_IFELSE(
14	 [AC_LANG_PROGRAM(
15	  [],
16	  [asm ("setssbsy");])],
17	 [enable_cet=yes],
18	 [enable_cet=no])
19	;;
20      yes)
21	# Check if assembler supports CET.
22	AC_COMPILE_IFELSE(
23	 [AC_LANG_PROGRAM(
24	  [],
25	  [asm ("setssbsy");])],
26	 [],
27	 [AC_MSG_ERROR([assembler with CET support is required for --enable-cet])])
28	;;
29    esac
30    ;;
31  *)
32    enable_cet=no
33    ;;
34esac
35if test x$enable_cet = xyes; then
36  $1="-fcf-protection -mcet"
37fi
38])
39