dnl

dnl Check for support for Retpoline

dnl

AC_DEFUN([AC_CC_RETPOLINE],[

AC_REQUIRE([gl_UNKNOWN_WARNINGS_ARE_ERRORS])

if test $enable_hardening = yes; then

case "$host" in

*)

gl_COMPILER_OPTION_IF([-mfunction-return=thunk -mindirect-branch=thunk], [

CFLAGS="$CFLAGS -mfunction-return=thunk -mindirect-branch=thunk"

],

[],

[AC_LANG_PROGRAM()]

)

esac

fi

])