1315ad878SRong Xu# SPDX-License-Identifier: GPL-2.0 2315ad878SRong Xu 3315ad878SRong Xu# Enable available and selected Clang AutoFDO features. 4315ad878SRong Xu 5315ad878SRong XuCFLAGS_AUTOFDO_CLANG := -fdebug-info-for-profiling -mllvm -enable-fs-discriminator=true -mllvm -improved-fs-discriminator=true 6315ad878SRong Xu 7315ad878SRong Xuifndef CONFIG_DEBUG_INFO 8315ad878SRong Xu CFLAGS_AUTOFDO_CLANG += -gmlt 9315ad878SRong Xuendif 10315ad878SRong Xu 11315ad878SRong Xuifdef CLANG_AUTOFDO_PROFILE 12*0847420fSRong Xu CFLAGS_AUTOFDO_CLANG += -fprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) -ffunction-sections 13315ad878SRong Xuendif 14315ad878SRong Xu 15315ad878SRong Xuifdef CONFIG_LTO_CLANG_THIN 16315ad878SRong Xu ifdef CLANG_AUTOFDO_PROFILE 17315ad878SRong Xu KBUILD_LDFLAGS += --lto-sample-profile=$(CLANG_AUTOFDO_PROFILE) 18315ad878SRong Xu endif 19315ad878SRong Xu KBUILD_LDFLAGS += --mllvm=-enable-fs-discriminator=true --mllvm=-improved-fs-discriminator=true -plugin-opt=thinlto 20315ad878SRong Xuendif 21315ad878SRong Xu 22315ad878SRong Xuexport CFLAGS_AUTOFDO_CLANG 23