On Sun, Jul 08, 2018 at 06:59:42PM +0900, Masahiro Yamada wrote:
> Currently, users are allowed to enable STACK_VALIDATION regardless
> of the compiler capability. The top-level Makefile warns or breaks
> the build if it turns out that the host compiler cannot link libelf.
>
> Move the libelf test to Kconfig so that users can enable the feature
> only when the host compiler can build the objtool. The ugly check
> in the Makefile will go away.
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@xxxxxxxxxxxxx>
Thanks for cleaning this up!
> I am sure about this patch only from the build system point of view.
>
> Please review this from x86 and objtool point of view.
>
> In my understanding:
>
> - UNWINDER_ORC _requires_ objtool,
> so I added 'depends on STACK_VALIDATION'.
> ('select' would end up with unmet depenency)
Correct.
> - RETPOLINE _wants_ objtool, so I added 'imply'
Yeah, I think this is fine.
Acked-by: Josh Poimboeuf <jpoimboe@xxxxxxxxxx>
--
Josh
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