linux-kernel - Re: [PATCH 2/2] ARM: drop -mauto-it

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Date:   Tue, 5 Mar 2019 15:20:18 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Stefan Agner <stefan@...er.ch>
Cc:     Russell King <linux@...linux.org.uk>,
        Will Deacon <will.deacon@....com>,
        Nathan Chancellor <natechancellor@...il.com>,
        Arnd Bergmann <arnd@...db.de>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Nicolas Pitre <nicolas.pitre@...aro.org>,
        Thierry Reding <thierry.reding@...il.com>,
        julien.thierry@....com, Mark Rutland <mark.rutland@....com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux ARM <linux-arm-kernel@...ts.infradead.org>
Subject: Re: [PATCH 2/2] ARM: drop -mauto-it

On Tue, Mar 5, 2019 at 2:40 PM Stefan Agner <stefan@...er.ch> wrote:
>
> On 05.03.2019 23:21, Nick Desaulniers wrote:
> > On Tue, Mar 5, 2019 at 2:17 PM Stefan Agner <stefan@...er.ch> wrote:
> >>
> >> The assembler option -mauto-it is no longer a valid option. It has
> >> been removed from the documentation in July 2009, which is well
> >> before the release date of the currently supported binutils version
> >> 2.20.
> >
> > Do you by chance have a link to the relevant commit?
> >
>
> Documentation got removed in
> https://github.com/bminor/binutils-gdb/commit/529707530657a333a304c651c808ea630c955223

The minimum version of binutils as per
Documentation/process/changes.rst is 2.20. Looks like 2.20 was
released around 2009-09-04:
https://github.com/bminor/binutils-gdb/commit/81c23f829ee829524ac3bf0b9422f8950306d1d6#diff-2bb5799f8d22903a285e71e925800c08

>
> I think -mauto-it never really made it upstream. Documentation has been
> introduced here, but it seems that the option already has been renamed:
> https://github.com/bminor/binutils-gdb/commit/e07e6e58be1c5273ed79a25c80ba831e71ac86b1
>
> >>
> >> Signed-off-by: Stefan Agner <stefan@...er.ch>
> >> ---
> >>  arch/arm/Makefile | 3 +--
> >>  1 file changed, 1 insertion(+), 2 deletions(-)
> >>
> >> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> >> index 9561325c5201..ebf67bebe73d 100644
> >> --- a/arch/arm/Makefile
> >> +++ b/arch/arm/Makefile
> >> @@ -113,8 +113,7 @@ CFLAGS_ABI  +=-funwind-tables
> >>  endif
> >>
> >>  ifeq ($(CONFIG_THUMB2_KERNEL),y)
> >> -AFLAGS_AUTOIT  :=$(call as-option,-Wa$(comma)-mimplicit-it=always,-Wa$(comma)-mauto-it)
> >> -CFLAGS_ISA     :=-mthumb $(AFLAGS_AUTOIT)
> >> +CFLAGS_ISA     :=-mthumb -Wa$(comma)-mimplicit-it=always
> >
> > Is $(comma) still needed? I thought it was only needed when a flag
> > that would contain commas would be in another set of parens (thus
> > making an ambiguity), like cc-ldoption or such?  Can you replace
> > `$(comma)` here with `,`?  I suspect it should work.
>
> Could catch, yes comma should work here.

Cool, if you wouldn't mind sending a v2 with that change, feel free to
add my reviewed by tag.
-- 
Thanks,
~Nick Desaulniers