+ CPU_CFLAGS = -Os -pipe
+ ifneq ($(findstring mips,$(ARCH)),)
+ ifneq ($(findstring mips64,$(ARCH)),)
+ CPU_TYPE ?= mips64
+ else
+ CPU_TYPE ?= mips32
+ endif
+ CPU_CFLAGS += -mno-branch-likely
+ CPU_CFLAGS_mips32 = -mips32 -mtune=mips32
+ CPU_CFLAGS_mips64 = -mips64 -mtune=mips64 -mabi=64
+ CPU_CFLAGS_24kc = -mips32r2 -mtune=24kc
+ CPU_CFLAGS_74kc = -mips32r2 -mtune=74kc
+ CPU_CFLAGS_octeonplus = -march=octeon+ -mabi=64
+ endif
+ ifeq ($(ARCH),i386)
+ CPU_TYPE ?= pentium
+ CPU_CFLAGS_pentium = -march=pentium-mmx
+ CPU_CFLAGS_pentium4 = -march=pentium4
+ endif
+ ifneq ($(findstring arm,$(ARCH)),)
+ CPU_TYPE ?= xscale
+ endif
+ ifeq ($(ARCH),powerpc)
+ CPU_CFLAGS_603e:=-mcpu=603e
+ CPU_CFLAGS_8540:=-mcpu=8540
+ CPU_CFLAGS_405:=-mcpu=405
+ CPU_CFLAGS_440:=-mcpu=440
+ CPU_CFLAGS_464fp:=-mcpu=464fp
+ endif
+ ifeq ($(ARCH),powerpc64)
+ CPU_TYPE ?= powerpc64
+ CPU_CFLAGS_powerpc64:=-mcpu=powerpc64
+ endif
+ ifeq ($(ARCH),sparc)
+ CPU_TYPE = sparc
+ CPU_CFLAGS_ultrasparc = -mcpu=ultrasparc
+ endif
+ ifeq ($(ARCH),aarch64)
+ CPU_TYPE ?= generic
+ CPU_CFLAGS_generic = -mcpu=generic
+ CPU_CFLAGS_cortex-a53 = -mcpu=cortex-a53
+ endif
+ ifeq ($(ARCH),arc)
+ CPU_TYPE ?= arc700
+ CPU_CFLAGS += -matomic
+ CPU_CFLAGS_arc700 = -mcpu=arc700
+ CPU_CFLAGS_archs = -mcpu=archs
+ endif
+ ifneq ($(CPU_TYPE),)
+ ifndef CPU_CFLAGS_$(CPU_TYPE)
+ $(warning CPU_TYPE "$(CPU_TYPE)" doesn't correspond to a known type)
+ endif
+ endif
+ DEFAULT_CFLAGS=$(strip $(CPU_CFLAGS) $(CPU_CFLAGS_$(CPU_TYPE)) $(CPU_CFLAGS_$(CPU_SUBTYPE)))
+