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

Rong Xu
2026-03-12T17:50:39Z

I appreciate Nathan and Nicolas taking this on. Should there be
anything required from my side, please let me know.

-Rong

On Thu, Mar 12, 2026 at 4:46 AM Nicolas Schier <nsc@kernel.org> wrote:
>
> 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