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

Nicolas Schier
2026-03-12T11:46:22Z

On Thu, Mar 12, 2026 at 01:25:02AM -0700, Nathan Chancellor wrote:
> Hi Nicolas,
>
> On Tue, Oct 28, 2025 at 06:28:20PM +0000, xur@google.com wrote:
> > From: Rong Xu <xur@google.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
>
> I have been running this for a few months locally and I have not noticed
> any problems with it (at least for the two distribution configurations I
> regularly test). I think this looks good overall and seems fairly well
> contained thanks to Masahiro's work on the earlier revisions. Could this
> be picked up in kbuild-next-unstable so it can bake in -next for a
> little bit? It should still be applicable.
>
> Reviewed-by: Nathan Chancellor <nathan@kernel.org>
> Tested-by: Nathan Chancellor <nathan@kernel.org>

Thanks! Sure, I will pick the series up.

Kind regards,
Nicolas