netdev - Re: [PATCH 3/9] kbuild: Do not pass arguments to link-vmlinux.sh

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Message-ID: <CAK7LNATU9_zBH9DpayNOCGsFVL0K+Y8Np0z7wxFuwO3Cf1K_tg@mail.gmail.com>
Date:   Fri, 6 Apr 2018 09:59:59 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Jiri Olsa <jolsa@...hat.com>
Cc:     Jiri Olsa <jolsa@...nel.org>, Alexei Starovoitov <ast@...nel.org>,
        Daniel Borkmann <daniel@...earbox.net>,
        lkml <linux-kernel@...r.kernel.org>, netdev@...r.kernel.org,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Quentin Monnet <quentin.monnet@...ronome.com>,
        Eugene Syromiatnikov <esyr@...hat.com>,
        Jiri Benc <jbenc@...hat.com>,
        Stanislav Kozina <skozina@...hat.com>,
        Jerome Marchand <jmarchan@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Jiri Kosina <jkosina@...e.cz>
Subject: Re: [PATCH 3/9] kbuild: Do not pass arguments to link-vmlinux.sh

2018-04-06 3:59 GMT+09:00 Jiri Olsa <jolsa@...hat.com>:
> On Fri, Apr 06, 2018 at 12:50:00AM +0900, Masahiro Yamada wrote:
>> 2018-04-06 0:16 GMT+09:00 Jiri Olsa <jolsa@...nel.org>:
>> > There's no need to pass LD* arguments to link-vmlinux.sh,
>> > because they are passed as variables. The only argument
>> > the link-vmlinux.sh supports is the 'clean' argument.
>> >
>> > Signed-off-by: Jiri Olsa <jolsa@...nel.org>
>> > ---
>>
>> Wrong.
>>
>> $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
>> exist here so that any change in them
>> invokes scripts/linkk-vmlinux.sh
>
> sry, I can't see that.. but it's just a side fix,
> which is actually not needed for the rest
>
> I'll check on more and address this separately


The link command is recorded in .vmlinux.cmd
then, it is checked by if_changed in the next rebuild
because link-vmlinux is invoked by $(call if_changed,...)

     +$(call if_changed,link-vmlinux)



> thanks,
> jirka
>
>>
>>
>>
>>
>> >  Makefile | 2 +-
>> >  1 file changed, 1 insertion(+), 1 deletion(-)
>> >
>> > diff --git a/Makefile b/Makefile
>> > index d3300e46f925..a65a3919c6ad 100644
>> > --- a/Makefile
>> > +++ b/Makefile
>> > @@ -1027,7 +1027,7 @@ ARCH_POSTLINK := $(wildcard $(srctree)/arch/$(SRCARCH)/Makefile.postlink)
>> >
>> >  # Final link of vmlinux with optional arch pass after final link
>> >  cmd_link-vmlinux =                                                 \
>> > -       $(CONFIG_SHELL) $< $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux) ;    \
>> > +       $(CONFIG_SHELL) $< ;                                       \
>> >         $(if $(ARCH_POSTLINK), $(MAKE) -f $(ARCH_POSTLINK) $@, true)
>> >
>> >  vmlinux: scripts/link-vmlinux.sh vmlinux_prereq $(vmlinux-deps) FORCE
>>
>>
>>
>>
>>
>>
>> --
>> Best Regards
>> Masahiro Yamada
> --
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-- 
Best Regards
Masahiro Yamada