linux-kernel - [PATCH 00/13] kbuild: refactoring after Clang LTO

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Date:   Thu, 19 Aug 2021 09:57:31 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     linux-kbuild@...r.kernel.org
Cc:     Sami Tolvanen <samitolvanen@...gle.com>,
        linux-kernel@...r.kernel.org,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        clang-built-linux@...glegroups.com
Subject: [PATCH 00/13] kbuild: refactoring after Clang LTO


The introduction of Clang LTO, the kbuild code became much
uglier due to CONFIG_LTO_CLANG conditionals.

It is painful to maintain the messed-up code, and to review
code changed on top of that.



Masahiro Yamada (13):
  kbuild: move objtool_args back to scripts/Makefile.build
  gen_compile_commands: extract compiler command from a series of
    commands
  kbuild: detect objtool changes correctly and remove .SECONDEXPANSION
  kbuild: remove unused quiet_cmd_update_lto_symversions
  kbuild: remove stale *.symversions
  kbuild: merge vmlinux_link() between the ordinary link and Clang LTO
  kbuild: do not remove 'linux' link in scripts/link-vmlinux.sh
  kbuild: merge vmlinux_link() between ARCH=um and other architectures
  kbuild: do not create built-in.a.symversions or lib.a.symversions
  kbuild: build modules in the same way with/without Clang LTO
  kbuild: always postpone CRC links for module versioning
  kbuild: merge cmd_modversions_c and cmd_modversions_S
  kbuild: merge cmd_ar_builtin and cmd_ar_module

 scripts/Makefile.build                      | 196 ++++++++------------
 scripts/Makefile.lib                        |  28 +--
 scripts/Makefile.modfinal                   |   4 +-
 scripts/Makefile.modpost                    |   7 +-
 scripts/clang-tools/gen_compile_commands.py |   2 +-
 scripts/link-vmlinux.sh                     | 125 +++++++------
 scripts/mod/modpost.c                       |   6 +-
 scripts/mod/sumversion.c                    |   6 +-
 8 files changed, 164 insertions(+), 210 deletions(-)

-- 
2.30.2