linux-kernel - Re: why scripts/link-vmlinux.sh has a final build of init/

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Message-ID: <ccc092fc-3d13-71e1-2029-82b70079807e@cn.fujitsu.com>
Date:   Wed, 21 Feb 2018 11:20:18 +0800
From:   Cao jin <caoj.fnst@...fujitsu.com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
CC:     Michal Marek <michal.lkml@...kovi.net>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: why scripts/link-vmlinux.sh has a final build of init/

Sorry for late.

On 02/14/2018 07:31 PM, Masahiro Yamada wrote:
> 2018-02-13 16:08 GMT+09:00 Cao jin <caoj.fnst@...fujitsu.com>:
> 
>> BTW, I still have 2 questions.
>>
>> 1. In final build, why need
>>
>>    GCC_PLUGINS_CFLAGS="${GCC_PLUGINS_CFLAGS}"
>>
>> Doesn't GCC_PLUGINS_CFLAGS already exist in the environment?
>>
>> I also tested the Randomizing Structure Layout plugin with this patch,
>> the plugin seems works in my test.
> 
> 
> I have not tested, but GCC_PLUGINS_CFLAGS="${GCC_PLUGINS_CFLAGS}"
> is probably unnecessary.
> 
> 
> 
>> 2. scripts/link-vmlinux.sh seems just handle only one argument: clean.
>> So why shouldn't it be:
> 
> 
> To detect the change of $(LD) $(LDFLAGS) $(LDFLAGS_vmlinux)
> because link-vmlinux.sh depends on them.
> 

I understood, I missed the existence of .vmlinux.cmd file.
Thanks very much, Masahiro-san.

-- 
Sincerely,
Cao jin

> 
>> diff --git a/Makefile b/Makefile
>> index ccd981892ef2..21d93b545381 100644
>> --- a/Makefile
>> +++ b/Makefile
>> @@ -998,7 +998,7 @@ 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
> 
> 
>