linux-kernel - Re: [PATCH v5 0/2] kbuild: distributed build support for Clang ThinLTO

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Message-ID: <ff40b07b-bc22-4588-ad17-c38b7b4d9867@cachyos.org>
Date: Tue, 28 Oct 2025 20:22:51 +0100
From: Piotr Gorski <piotrgorski@...hyos.org>
To: xur@...gle.com, Masahiro Yamada <masahiroy@...nel.org>,
 Nathan Chancellor <nathan@...nel.org>,
 Nicolas Schier <nicolas.schier@...ux.dev>,
 Nick Desaulniers <nick.desaulniers+lkml@...il.com>,
 Bill Wendling <morbo@...gle.com>, Justin Stitt <justinstitt@...gle.com>,
 Miguel Ojeda <ojeda@...nel.org>, Thomas Gleixner <tglx@...utronix.de>,
 Alice Ryhl <aliceryhl@...gle.com>, Sami Tolvanen <samitolvanen@...gle.com>,
 "Mike Rapoport (Microsoft)" <rppt@...nel.org>,
 Rafael Aquini <aquini@...hat.com>, Michael Ellerman <mpe@...erman.id.au>,
 Stafford Horne <shorne@...il.com>,
 Christophe Leroy <christophe.leroy@...roup.eu>,
 Teresa Johnson <tejohnson@...gle.com>
Cc: linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
 llvm@...ts.linux.dev
Subject: Re: [PATCH v5 0/2] kbuild: distributed build support for Clang
 ThinLTO

Built and booted without any problems.

lucjan at cachyos ~ 20:19:27
❯ zgrep -i THIN_DIST /proc/config.gz
CONFIG_LTO_CLANG_THIN_DIST=y
lucjan at cachyos ~ 20:19:45
❯ cat /proc/version
Linux version 6.17.5-1.3-cachyos (linux-cachyos@...hyos) (clang version 
21.1.3, LLD 21.1.4) #1 SMP PREEMPT_DYNAMIC Tue, 28 Oct 2025 18:39:23 +0000

Thanks!

W dniu 28.10.2025 o 19:28, xur@...gle.com pisze:
> From: Rong Xu <xur@...gle.com>
>
> ChangeLog:
>
> V5: Handle single quote escaping in echo _c_flags to fix
>      Piotr Gorski's reported error.
>
> V4: This is based on the reimplementation provided by Masahiro Yamada
> on May 26. The difference is that this version now saves the compiler
> flags (_c_flags) from the Front-End (FE) compilation and re-uses them
> for the subsequent Back-End (BE) compilation.
>   
> Rong Xu (2):
>    kbuild: move vmlinux.a build rule to scripts/Makefile.vmlinux_a
>    kbuild: distributed build support for Clang ThinLTO
>
>   .gitignore                 |  2 +
>   Makefile                   | 25 +++++-------
>   arch/Kconfig               | 19 +++++++++
>   scripts/Makefile.lib       |  7 ++++
>   scripts/Makefile.thinlto   | 40 ++++++++++++++++++
>   scripts/Makefile.vmlinux_a | 83 ++++++++++++++++++++++++++++++++++++++
>   scripts/mod/modpost.c      | 15 +++++--
>   7 files changed, 174 insertions(+), 17 deletions(-)
>   create mode 100644 scripts/Makefile.thinlto
>   create mode 100644 scripts/Makefile.vmlinux_a
>
>
> base-commit: dcb6fa37fd7bc9c3d2b066329b0d27dedf8becaa