linux-kernel - Re: [PATCH 02/10] kbuild: clean up *.lex.c and *.tab.[ch] patterns from top-level Makefile

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Date:   Fri, 23 Mar 2018 18:20:01 -0700
From:   Frank Rowand <frowand.list@...il.com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        linux-kbuild@...r.kernel.org
Cc:     Sam Ravnborg <sam@...nborg.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        linux-kernel@...r.kernel.org, Arnd Bergmann <arnd@...db.de>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Frank Rowand <frank.rowand@...y.com>,
        Geert Uytterhoeven <geert@...ux-m68k.org>
Subject: Re: [PATCH 02/10] kbuild: clean up *.lex.c and *.tab.[ch] patterns
 from top-level Makefile

On 03/23/18 06:04, Masahiro Yamada wrote:
> Files suffixed by .lex.c, .tab.[ch] are generated lexers, parsers,
> respectively.  Clean them up globally from the top Makefile.
> 
> Some of the final host programs they are linked into are needed for
> building external modules, but those intermediates are unneeded.
> They can be cleaned away by 'make clean' instead of 'make mrproper'.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>

Acked-by: Frank Rowand <frowand.list@...il.com>

-Frank

> ---
> 
>  Makefile                  | 1 +
>  scripts/dtc/Makefile      | 6 ++----
>  scripts/genksyms/Makefile | 2 --
>  scripts/kconfig/Makefile  | 2 +-
>  4 files changed, 4 insertions(+), 7 deletions(-)
> 
> diff --git a/Makefile b/Makefile
> index 493e267..168432e 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -1613,6 +1613,7 @@ clean: $(clean-dirs)
>  		-o -name '*.dwo' -o -name '*.lst' \
>  		-o -name '*.su'  \
>  		-o -name '.*.d' -o -name '.*.tmp' -o -name '*.mod.c' \
> +		-o -name '*.lex.c' -o -name '*.tab.[ch]' \
>  		-o -name '*.symtypes' -o -name 'modules.order' \
>  		-o -name modules.builtin -o -name '.tmp_*.o.*' \
>  		-o -name .cache.mk \
> diff --git a/scripts/dtc/Makefile b/scripts/dtc/Makefile
> index a88b8c9..d17ba64 100644
> --- a/scripts/dtc/Makefile
> +++ b/scripts/dtc/Makefile
> @@ -28,7 +28,5 @@ HOSTCFLAGS_dtc-parser.tab.o := $(HOSTCFLAGS_DTC)
>  # dependencies on generated files need to be listed explicitly
>  $(obj)/dtc-lexer.lex.o: $(obj)/dtc-parser.tab.h
>  
> -# generated files need to include *.cmd and be cleaned explicitly
> -generated-files	:= dtc-lexer.lex.c dtc-parser.tab.c dtc-parser.tab.h
> -targets		:= $(generated-files)
> -clean-files	:= $(generated-files)
> +# generated files need to include *.cmd
> +targets := dtc-lexer.lex.c dtc-parser.tab.c dtc-parser.tab.h
> diff --git a/scripts/genksyms/Makefile b/scripts/genksyms/Makefile
> index 34d6ab1..0ccac51 100644
> --- a/scripts/genksyms/Makefile
> +++ b/scripts/genksyms/Makefile
> @@ -11,5 +11,3 @@ HOSTCFLAGS_lex.lex.o := -I$(src)
>  
>  # dependencies on generated files need to be listed explicitly
>  $(obj)/lex.lex.o: $(obj)/parse.tab.h
> -
> -clean-files	:= lex.lex.c parse.tab.c parse.tab.h
> diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
> index f9bdd02..1dcd797 100644
> --- a/scripts/kconfig/Makefile
> +++ b/scripts/kconfig/Makefile
> @@ -209,7 +209,7 @@ hostprogs-y := conf nconf mconf kxgettext qconf gconf
>  
>  targets		+= zconf.tab.c zconf.lex.c
>  clean-files	:= qconf.moc .tmp_qtcheck .tmp_gtkcheck
> -clean-files	+= zconf.tab.c zconf.lex.c gconf.glade.h
> +clean-files	+= gconf.glade.h
>  clean-files     += config.pot linux.pot
>  
>  # Check that we have the required ncurses stuff installed for lxdialog (menuconfig)
>