PERF_OPT=$(if $(filter -Os,$(KBUILD_CFLAGS)),,y) cflags-y += $(call cc-option,-ffunction-sections,) $(call cc-option,-fdata-sections,) ifeq ($(PERF_OPT),y) cflags-y += -DPERF_OPT else PREFERRED_STACK_BOUNDARY = y endif ifeq ($(COMPILER),clang) ifeq ($(CONFIG_X86_IAMCU),) KBUILD_CPPFLAGS += $(call cc-option,-Qunused-arguments,) else CC_M32 = -m32 -mmcu KBUILD_CFLAGS += -mmcu KBUILD_CPPFLAGS += -mmcu endif biarch := $(call cc-option,-m32) dwarf2 := $(call cc-option,-gdwarf-2) KBUILD_AFLAGS += $(biarch) KBUILD_CFLAGS += $(biarch) KBUILD_CFLAGS += $(dwarf2) else cflags-$(PREFERRED_STACK_BOUNDARY) += $(call cc-option,-mpreferred-stack-boundary=2) endif cflags-$(CONFIG_LTO) += $(call cc-option,-flto,) ifneq ($(CONFIG_SSE_FP_MATH),y) cflags-y += -mno-sse endif include $(srctree)/arch/$(ARCH)/soc/$(SOC_PATH)/Makefile KBUILD_CXXFLAGS += $(cflags-y) KBUILD_CFLAGS += $(cflags-y) soc-cxxflags ?= $(soc-cflags) soc-aflags ?= $(soc-cflags) KBUILD_CFLAGS += $(soc-cflags) KBUILD_CXXFLAGS += $(soc-cxxflags) KBUILD_AFLAGS += $(soc-aflags)