Il 28/03/2014 18:41, Laurent Desnogues ha scritto:
> + gcc_flags="-fstack-protector-strong -fstack-protector-all"
> + for flag in $gcc_flags; do
> + if compile_prog "-Werror $flag" "" ; then
> + QEMU_CFLAGS="$QEMU_CFLAGS $flag"
> + LIBTOOLFLAGS="$LIBTOOLFLAGS -Wc,$flag"
> + break
> + fi
> + done
> fi
My understanding is that -fstack-protector, -fstack-protector-strong,
and -fstack-protector-all are strictly ordered in terms of the number
of functions that are checked, so you have changed the default
behavior to check less functions for compilers that support
-fstack-protector-strong. Is that what you had in mind?
Yes. -fstack-protector-all adds protection in places where it doesn't
really matter, and that's why it has such a high cost.
Paolo
