| # 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=true | |
| RUSTFLAGS_AUTOFDO_CLANG := $(if $(call rustc-min-version,109800),-Zdebuginfo-for-profiling,-Zdebug-info-for-profiling) -Cllvm-args=-enable-fs-discriminator=true -Cllvm-args=-improved-fs-discriminator=true | |
| ifndef CONFIG_DEBUG_INFO | |
| CFLAGS_AUTOFDO_CLANG += -gmlt | |
| RUSTFLAGS_AUTOFDO_CLANG += -Cdebuginfo=line-tables-only | |
| endif | |
| ifdef CLANG_AUTOFDO_PROFILE | |
| CFLAGS_AUTOFDO_CLANG += -fprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) -ffunction-sections | |
| CFLAGS_AUTOFDO_CLANG += -fsplit-machine-functions | |
| RUSTFLAGS_AUTOFDO_CLANG += -Zprofile-sample-use=$(CLANG_AUTOFDO_PROFILE) -Zfunction-sections=y | |
| RUSTFLAGS_AUTOFDO_CLANG += -Cllvm-args=-split-machine-functions | |
| endif | |
| ifdef CONFIG_LTO_CLANG_THIN | |
| ifdef CLANG_AUTOFDO_PROFILE | |
| KBUILD_LDFLAGS += --lto-sample-profile=$(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-functions | |
| endif | |
| export CFLAGS_AUTOFDO_CLANG RUSTFLAGS_AUTOFDO_CLANG |