Hi Rong, On Sat, Nov 02, 2024 at 10:51:14AM -0700, Rong Xu wrote: > diff --git a/scripts/Makefile.propeller b/scripts/Makefile.propeller > new file mode 100644 > index 0000000000000..344190717e471 > --- /dev/null > +++ b/scripts/Makefile.propeller > @@ -0,0 +1,28 @@ > +# SPDX-License-Identifier: GPL-2.0 > + > +# Enable available and selected Clang Propeller features. > +ifdef CLANG_PROPELLER_PROFILE_PREFIX > + CFLAGS_PROPELLER_CLANG := -fbasic-block-sections=list=$(CLANG_PROPELLER_PROFILE_PREFIX)_cc_profile.txt -ffunction-sections > + KBUILD_LDFLAGS += --symbol-ordering-file=$(CLANG_PROPELLER_PROFILE_PREFIX)_ld_profile.txt --no-warn-symbol-ordering > +else > + CFLAGS_PROPELLER_CLANG := -fbasic-block-sections=labels > +endif It appears that '-fbasic-block-sections=labels' has been deprecated in the main branch of LLVM, as I see a warning repeated over and over when building allmodconfig: clang: warning: argument '-fbasic-block-sections=labels' is deprecated, use '-fbasic-block-address-map' instead [-Wdeprecated] https://github.com/llvm/llvm-project/commit/7b7747dc1d3da1a829503ea9505b4cecce4f5bda Sorry that I missed this during testing, as I was only using clang-19 at the time. I think you can send a fixup on top of Masahiro's branch: https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git/log/?h=kbuild > +# Propeller requires debug information to embed module names in the profiles. > +# If CONFIG_DEBUG_INFO is not enabled, set -gmlt option. Skip this for AutoFDO, > +# as the option should already be set. > +ifndef CONFIG_DEBUG_INFO > + ifndef CONFIG_AUTOFDO_CLANG > + CFLAGS_PROPELLER_CLANG += -gmlt > + endif > +endif > + > +ifdef CONFIG_LTO_CLANG_THIN > + ifdef CLANG_PROPELLER_PROFILE_PREFIX > + KBUILD_LDFLAGS += --lto-basic-block-sections=$(CLANG_PROPELLER_PROFILE_PREFIX)_cc_profile.txt > + else > + KBUILD_LDFLAGS += --lto-basic-block-sections=labels I think this might have a similar problem but I have not tested. > + endif > +endif > + > +export CFLAGS_PROPELLER_CLANG Cheers, Nathan
