Re: [PATCH for review] [67/145] x86_64: Detect CFI support in the assembler at runtime

Andi Kleen
2006-08-11T05:56:06Z

On Friday 11 August 2006 07:39, Sam Ravnborg wrote:
> > +# as-instr
> > +# Usage: cflags-y += $(call as-instr, instr, option1, option2)
> > +
> > +as-instr = $(shell if echo -e "$(1)" | $(AS) -Z -o /dev/null \
> > + 2>&1 >/dev/null ; then echo "$(2)"; else echo "$(3)"; fi;)
>
> Have you checked that as will not delete yout /dev/null if you build as
> root? ld do so if you specify /dev/null as output file.

No. But it's probably safter to do it otherwise. Do you have an alternative?

-Andi