linux-kernel - Re: [PATCH v2 04/13] kbuild: factor out OBJECT_FILES_NON

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Date:   Tue, 31 Aug 2021 10:25:18 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kbuild@...r.kernel.org,
        Michal Marek <michal.lkml@...kovi.net>,
        linux-kernel@...r.kernel.org, Josh Poimboeuf <jpoimboe@...hat.com>,
        Peter Zijlstra <peterz@...radead.org>
Subject: Re: [PATCH v2 04/13] kbuild: factor out OBJECT_FILES_NON_STANDARD
 check into a macro

On Tue, Aug 31, 2021 at 12:40 AM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> The OBJECT_FILES_NON_STANDARD check is quite long.
>
> Factor it out into a new macro, objtool-enabled, to not repeat it.
>
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>

Reviewed-by: Nick Desaulniers <ndesaulniers@...gle.com>

> ---
>
>  scripts/Makefile.build | 12 ++++++------
>  1 file changed, 6 insertions(+), 6 deletions(-)
>
> diff --git a/scripts/Makefile.build b/scripts/Makefile.build
> index 021ae0146913..720a86642f48 100644
> --- a/scripts/Makefile.build
> +++ b/scripts/Makefile.build
> @@ -241,12 +241,12 @@ ifndef CONFIG_LTO_CLANG
>  # 'OBJECT_FILES_NON_STANDARD := y': skip objtool checking for a directory
>  # 'OBJECT_FILES_NON_STANDARD_foo.o := 'y': skip objtool checking for a file
>  # 'OBJECT_FILES_NON_STANDARD_foo.o := 'n': override directory skip for a file
> -cmd_objtool = $(if $(patsubst y%,, \
> -       $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \
> -       ; $(objtool) $(objtool_args) $@)
> -objtool_obj = $(if $(patsubst y%,, \
> -       $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n), \
> -       $(objtool))
> +
> +objtool-enabled = $(if $(filter-out y%, \
> +       $(OBJECT_FILES_NON_STANDARD_$(basetarget).o)$(OBJECT_FILES_NON_STANDARD)n),y)
> +
> +cmd_objtool = $(if $(objtool-enabled), ; $(objtool) $(objtool_args) $@)
> +objtool_obj = $(if $(objtool-enabled), $(objtool))
>
>  endif # CONFIG_LTO_CLANG
>  endif # CONFIG_STACK_VALIDATION
> --
> 2.30.2
>


-- 
Thanks,
~Nick Desaulniers