# SPDX-License-Identifier: GPL-2.0 # Enable available and selected Clang AutoFDO features. CFLAGS_AUTOFDO_CLANG := -fdebug-info-for-profiling -mllvm -enable-fs-discriminator=true -mllvm -improved-fs-discriminator=trueRUSTFLAGS_AUTOFDO_CLANG := $(if $(call rustc-min-version,109800),-Zdebuginfo-for-profiling,-Zdebug-info-for-profiling) -Cllvm-args=-enable-fs-discriminator=true -Cllvm-args=-improved-fs-discriminator=true ifndef CONFIG_DEBUG_INFO  CFLAGS_AUTOFDO_CLANG += -gmlt  RUSTFLAGS_AUTOFDO_CLANG += -Cdebuginfo=line-tables-onlyendif ifdef CLANG_AUTOFDO_PROFILE  CFLAGS_AUTOFDO_CLANG += -fprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) -ffunction-sections  CFLAGS_AUTOFDO_CLANG += -fsplit-machine-functions  RUSTFLAGS_AUTOFDO_CLANG += -Zprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) -Zfunction-sections=y  RUSTFLAGS_AUTOFDO_CLANG += -Cllvm-args=-split-machine-functionsendif ifdef CONFIG_LTO_CLANG_THIN  ifdef CLANG_AUTOFDO_PROFILE    KBUILD_LDFLAGS += --lto-sample-profile=$(CLANG_AUTOFDO_PROFILE)  endif  KBUILD_LDFLAGS += --mllvm=-enable-fs-discriminator=true --mllvm=-improved-fs-discriminator=true -plugin-opt=thinlto  KBUILD_LDFLAGS += -plugin-opt=-split-machine-functionsendif export CFLAGS_AUTOFDO_CLANG RUSTFLAGS_AUTOFDO_CLANG