1*315ad878SRong Xu# SPDX-License-Identifier: GPL-2.0 2*315ad878SRong Xu 3*315ad878SRong Xu# Enable available and selected Clang AutoFDO features. 4*315ad878SRong Xu 5*315ad878SRong XuCFLAGS_AUTOFDO_CLANG := -fdebug-info-for-profiling -mllvm -enable-fs-discriminator=true -mllvm -improved-fs-discriminator=true 6*315ad878SRong Xu 7*315ad878SRong Xuifndef CONFIG_DEBUG_INFO 8*315ad878SRong Xu CFLAGS_AUTOFDO_CLANG += -gmlt 9*315ad878SRong Xuendif 10*315ad878SRong Xu 11*315ad878SRong Xuifdef CLANG_AUTOFDO_PROFILE 12*315ad878SRong Xu CFLAGS_AUTOFDO_CLANG += -fprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) 13*315ad878SRong Xuendif 14*315ad878SRong Xu 15*315ad878SRong Xuifdef CONFIG_LTO_CLANG_THIN 16*315ad878SRong Xu ifdef CLANG_AUTOFDO_PROFILE 17*315ad878SRong Xu KBUILD_LDFLAGS += --lto-sample-profile=$(CLANG_AUTOFDO_PROFILE) 18*315ad878SRong Xu endif 19*315ad878SRong Xu KBUILD_LDFLAGS += --mllvm=-enable-fs-discriminator=true --mllvm=-improved-fs-discriminator=true -plugin-opt=thinlto 20*315ad878SRong Xuendif 21*315ad878SRong Xu 22*315ad878SRong Xuexport CFLAGS_AUTOFDO_CLANG 23