linux-kernel - Re: [PATCH] kbuild: move modpost out of 'scripts' target

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Message-ID: <CAK7LNAT35jjpRr_n7p-mUTXj9fCtBzyGcwQfwZdbL8_CtUA9mg@mail.gmail.com>
Date:   Fri, 23 Nov 2018 14:02:40 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Cc:     Michal Marek <michal.lkml@...kovi.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kbuild: move modpost out of 'scripts' target

On Wed, Nov 21, 2018 at 2:16 AM Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
>
> I am eagar to build under the scripts/ directory only with $(HOSTCC),
> but scripts/mod/ highly depends on the $(CC) and target arch headers.
> That it why the 'scripts' target must depend on 'asm-generic',
> 'gcc-plugins', and $(autoksyms_h).
>
> Move it to the 'prepare0' stage. I know this is a cheesy workaround,
> but better than the current situation.
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>


Applied to linux-kbuild.



> ---
>
>  Makefile             | 3 ++-
>  scripts/Makefile     | 3 +--
>  scripts/mod/Makefile | 2 --
>  3 files changed, 3 insertions(+), 5 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index b78cc97..21a7729 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1073,7 +1073,7 @@ include/config/kernel.release: $(srctree)/Makefile FORCE
>  # Carefully list dependencies so we do not try to build scripts twice
>  # in parallel
>  PHONY += scripts
> -scripts: scripts_basic scripts_dtc asm-generic gcc-plugins $(autoksyms_h)
> +scripts: scripts_basic scripts_dtc
>         $(Q)$(MAKE) $(build)=$(@)
>
>  # Things we need to do before we recursively start building the kernel
> @@ -1111,6 +1111,7 @@ macroprepare: prepare1 archmacros
>  archprepare: archheaders archscripts macroprepare scripts_basic
>
>  prepare0: archprepare gcc-plugins
> +       $(Q)$(MAKE) $(build)=scripts/mod
>         $(Q)$(MAKE) $(build)=.
>
>  # All the preparing..
> diff --git a/scripts/Makefile b/scripts/Makefile
> index ece52ff..b48259d 100644
> --- a/scripts/Makefile
> +++ b/scripts/Makefile
> @@ -37,9 +37,8 @@ build_unifdef: $(obj)/unifdef
>         @:
>
>  subdir-$(CONFIG_MODVERSIONS) += genksyms
> -subdir-y                     += mod
>  subdir-$(CONFIG_SECURITY_SELINUX) += selinux
>  subdir-$(CONFIG_GDB_SCRIPTS) += gdb
>
>  # Let clean descend into subdirs
> -subdir-        += basic dtc kconfig package gcc-plugins
> +subdir-        += basic dtc kconfig mod package gcc-plugins
> diff --git a/scripts/mod/Makefile b/scripts/mod/Makefile
> index a5b4af4..42c5d50 100644
> --- a/scripts/mod/Makefile
> +++ b/scripts/mod/Makefile
> @@ -4,8 +4,6 @@ OBJECT_FILES_NON_STANDARD := y
>  hostprogs-y    := modpost mk_elfconfig
>  always         := $(hostprogs-y) empty.o
>
> -CFLAGS_REMOVE_empty.o := $(ASM_MACRO_FLAGS)
> -
>  modpost-objs   := modpost.o file2alias.o sumversion.o
>
>  devicetable-offsets-file := devicetable-offsets.h
> --
> 2.7.4
>


-- 
Best Regards
Masahiro Yamada