linux-kernel - Re: [PATCH v2 0/9] kbuild: clean-up modversion, TRIM_UNUSED_KSYMS, if_changed

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Date:   Wed, 21 Nov 2018 23:39:13 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Cc:     Sam Ravnborg <sam@...nborg.org>,
        Nicolas Pitre <nicolas.pitre@...aro.org>,
        Rasmus Villemoes <linux@...musvillemoes.dk>,
        linux-arch <linux-arch@...r.kernel.org>,
        Arnd Bergmann <arnd@...db.de>,
        Michael Ellerman <mpe@...erman.id.au>,
        linux-um@...ts.infradead.org,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Richard Weinberger <richard@....at>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Will Deacon <will.deacon@....com>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Jeff Dike <jdike@...toit.com>
Subject: Re: [PATCH v2 0/9] kbuild: clean-up modversion, TRIM_UNUSED_KSYMS,
 if_changed_rule, etc.

On Tue, Nov 20, 2018 at 10:11 AM Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
>
> As a Kbuild maintainer, I always struggle to keep the core makefiles
> clean because people tend to squeeze more and more clutter code into
> the kbuild core in order to do what they want to do.
>
> The biggest step forward in this series is to re-implement
> the build trick of CONFIG_TRIM_UNUSED_KSYMS in a cleaner way.
> scripts/Kbuild.include now looks nice again.
> Also, in my rough estimation, building with CONFIG_TRIM_UNUSED_KSYMS
> became 40-50 % faster.
>
> Besides those, nice cleanups are here and there.
>
> Masahiro Yamada (9):
>   kbuild: let fixdep directly write to .*.cmd files
>   kbuild: remove redundant 'set -e' from filechk_* defines
>   kbuild: remove redundant 'set -e' from sub_cmd_record_mcount
>   kbuild: refactor modversions build rules
>   kbuild: simplify dependency generation for CONFIG_TRIM_UNUSED_KSYMS
>   kbuild: change if_changed_rule for multi-line recipe
>   kbuild: remove trailing semicolon from cmd_* passed to if_changed_rule
>   kbuild: refactor if_changed and if_changed_dep
>   kbuild: remove redundant 'set -e' from cmd_* defines

Series, applied to linux-kbuild.





>  Makefile                     |  13 +++---
>  arch/um/Makefile             |   2 +-
>  include/asm-generic/export.h |  13 +++---
>  include/linux/export.h       |  18 ++++----
>  scripts/Kbuild.include       |  49 +++-----------------
>  scripts/Makefile.build       | 105 ++++++++++++++++++-------------------------
>  scripts/Makefile.lib         |   2 +-
>  scripts/basic/fixdep.c       |  31 ++-----------
>  scripts/gen_ksymdeps.sh      |  25 +++++++++++
>  scripts/package/Makefile     |   1 -
>  10 files changed, 106 insertions(+), 153 deletions(-)
>  create mode 100755 scripts/gen_ksymdeps.sh
>
> --
> 2.7.4
>


-- 
Best Regards
Masahiro Yamada