linux-kernel - Re: [PATCH v2 1/2] kbuild: make 'archprepare' depend on 'scripts'

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Date:   Sat, 1 Dec 2018 23:56:09 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Cc:     Kees Cook <keescook@...omium.org>,
        Emese Revfy <re.emese@...il.com>,
        Michal Marek <michal.lkml@...kovi.net>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 1/2] kbuild: make 'archprepare' depend on 'scripts'

On Thu, Nov 29, 2018 at 12:57 PM Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
>
> Before start descending, Kbuild needs to run 'prepare' and 'scripts',
> which has been orthogonal to each other.
>
> Going forward, let's consider 'scripts' is a part of the preparation.
> This will allow more cleanups.
>
> Move 'scripts' to the prerequisite of 'archprepare', where UML starts
> compiling target *.c files.
>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> ---
>
> Changes in v2:
>   - It turned out UML + CONFIG_GCC_PLUGINS is broken for a long time.
>     https://patchwork.kernel.org/patch/10703853/
>     Rebased on the top of the fix-up

Applied to linux-kbuild.


>  Makefile | 32 +++++++++++++++-----------------
>  1 file changed, 15 insertions(+), 17 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index f7cc3ee..9eb3f4f 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1062,7 +1062,7 @@ $(sort $(vmlinux-deps)): $(vmlinux-dirs) ;
>  # Error messages still appears in the original language
>
>  PHONY += $(vmlinux-dirs)
> -$(vmlinux-dirs): prepare scripts
> +$(vmlinux-dirs): prepare
>         $(Q)$(MAKE) $(build)=$@ need-builtin=1
>
>  define filechk_kernel.release
> @@ -1112,7 +1112,7 @@ prepare1: prepare2 $(version_h) $(autoksyms_h) include/generated/utsrelease.h
>
>  macroprepare: prepare1 archmacros
>
> -archprepare: archheaders archscripts macroprepare scripts_basic gcc-plugins
> +archprepare: archheaders archscripts macroprepare scripts gcc-plugins
>
>  prepare0: archprepare
>         $(Q)$(MAKE) $(build)=scripts/mod
> @@ -1286,7 +1286,7 @@ modules.builtin: $(vmlinux-dirs:%=%/modules.builtin)
>
>  # Target to prepare building external modules
>  PHONY += modules_prepare
> -modules_prepare: prepare scripts
> +modules_prepare: prepare
>
>  # Target to install modules
>  PHONY += modules_install
> @@ -1604,11 +1604,9 @@ help:
>         @echo  '  clean           - remove generated files in module directory only'
>         @echo  ''
>
> -# Dummies...
> -PHONY += prepare scripts
> +PHONY += prepare
>  prepare:
>         $(cmd_crmodverdir)
> -scripts: ;
>  endif # KBUILD_EXTMOD
>
>  clean: $(clean-dirs)
> @@ -1712,33 +1710,33 @@ else
>          target-dir = $(if $(KBUILD_EXTMOD),$(dir $<),$(dir $@))
>  endif
>
> -%.s: %.c prepare scripts FORCE
> +%.s: %.c prepare FORCE
>         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
> -%.i: %.c prepare scripts FORCE
> +%.i: %.c prepare FORCE
>         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
> -%.o: %.c prepare scripts FORCE
> +%.o: %.c prepare FORCE
>         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
> -%.lst: %.c prepare scripts FORCE
> +%.lst: %.c prepare FORCE
>         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
> -%.s: %.S prepare scripts FORCE
> +%.s: %.S prepare FORCE
>         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
> -%.o: %.S prepare scripts FORCE
> +%.o: %.S prepare FORCE
>         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
> -%.symtypes: %.c prepare scripts FORCE
> +%.symtypes: %.c prepare FORCE
>         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
> -%.ll: %.c prepare scripts FORCE
> +%.ll: %.c prepare FORCE
>         $(Q)$(MAKE) $(build)=$(build-dir) $(target-dir)$(notdir $@)
>
>  # Modules
> -/: prepare scripts FORCE
> +/: prepare FORCE
>         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
>         $(build)=$(build-dir)
>  # Make sure the latest headers are built for Documentation
>  Documentation/ samples/: headers_install
> -%/: prepare scripts FORCE
> +%/: prepare FORCE
>         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1) \
>         $(build)=$(build-dir)
> -%.ko: prepare scripts FORCE
> +%.ko: prepare FORCE
>         $(Q)$(MAKE) KBUILD_MODULES=$(if $(CONFIG_MODULES),1)   \
>         $(build)=$(build-dir) $(@:.ko=.o)
>         $(Q)$(MAKE) -f $(srctree)/scripts/Makefile.modpost
> --
> 2.7.4
>


-- 
Best Regards
Masahiro Yamada