scripts/Makefile.propeller

   1 # SPDX-License-Identifier: GPL-2.0
   2
   3 # Enable available and selected Clang Propeller features.
   4 ifdef CLANG_PROPELLER_PROFILE_PREFIX
   5   CFLAGS_PROPELLER_CLANG := -fbasic-block-sections=list=$(CLANG_PROPELLER_PROFILE_PREFIX)_cc_profile.txt -ffunction-sections
   6   KBUILD_LDFLAGS += --symbol-ordering-file=$(CLANG_PROPELLER_PROFILE_PREFIX)_ld_profile.txt --no-warn-symbol-ordering
   7 else
   8   # Starting with Clang v20, the '-fbasic-block-sections=labels' option is
   9   # deprecated. Use the recommended '-fbasic-block-address-map' option.
  10   # Link: https://github.com/llvm/llvm-project/pull/110039
  11   ifeq ($(call clang-min-version, 200000),y)
  12     CFLAGS_PROPELLER_CLANG := -fbasic-block-address-map
  13   else
  14     CFLAGS_PROPELLER_CLANG := -fbasic-block-sections=labels
  15   endif
  16 endif
  17
  18 # Propeller requires debug information to embed module names in the profiles.
  19 # If CONFIG_DEBUG_INFO is not enabled, set -gmlt option. Skip this for AutoFDO,
  20 # as the option should already be set.
  21 ifndef CONFIG_DEBUG_INFO
  22   ifndef CONFIG_AUTOFDO_CLANG
  23     CFLAGS_PROPELLER_CLANG += -gmlt
  24   endif
  25 endif
  26
  27 ifdef CONFIG_LTO_CLANG_THIN
  28   ifdef CLANG_PROPELLER_PROFILE_PREFIX
  29     KBUILD_LDFLAGS += --lto-basic-block-sections=$(CLANG_PROPELLER_PROFILE_PREFIX)_cc_profile.txt
  30   else
  31     ifeq ($(call test-ge, $(CONFIG_LLD_VERSION), 200000),y)
  32        KBUILD_LDFLAGS += --lto-basic-block-address-map
  33     else
  34        KBUILD_LDFLAGS += --lto-basic-block-sections=labels
  35     endif
  36   endif
  37 endif
  38
  39 export CFLAGS_PROPELLER_CLANG