ceph/src/dpdk/mk/toolchain/gcc/rte.toolchain-compat.mk

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  31
  32 #
  33 # CPUID-related options
  34 #
  35 # This was added to support compiler versions which might not support all the
  36 # flags we need
  37 #
  38
  39 #find out GCC version
  40
  41 GCC_MAJOR = $(shell echo __GNUC__ | $(CC) -E -x c - | tail -n 1)
  42 GCC_MINOR = $(shell echo __GNUC_MINOR__ | $(CC) -E -x c - | tail -n 1)
  43 GCC_VERSION = $(GCC_MAJOR)$(GCC_MINOR)
  44
  45 # if GCC is older than 4.x
  46 ifeq ($(shell test $(GCC_VERSION) -lt 40 && echo 1), 1)
  47         MACHINE_CFLAGS =
  48 $(warning You are using GCC < 4.x. This is neither supported, nor tested.)
  49
  50
  51 else
  52 # GCC graceful degradation
  53 # GCC 4.2.x - added support for generic target
  54 # GCC 4.3.x - added support for core2, ssse3, sse4.1, sse4.2
  55 # GCC 4.4.x - added support for avx, aes, pclmul
  56 # GCC 4.5.x - added support for atom
  57 # GCC 4.6.x - added support for corei7, corei7-avx
  58 # GCC 4.7.x - added support for fsgsbase, rdrnd, f16c, core-avx-i, core-avx2
  59 # GCC 4.9.x - added support for armv8-a+crc
  60 #
  61         ifeq ($(shell test $(GCC_VERSION) -le 49 && echo 1), 1)
  62                 MACHINE_CFLAGS := $(patsubst -march=armv8-a+crc,-march=armv8-a+crc -D__ARM_FEATURE_CRC32=1,$(MACHINE_CFLAGS))
  63         endif
  64         ifeq ($(shell test $(GCC_VERSION) -le 47 && echo 1), 1)
  65                 MACHINE_CFLAGS := $(patsubst -march=core-avx-i,-march=corei7-avx,$(MACHINE_CFLAGS))
  66                 MACHINE_CFLAGS := $(patsubst -march=core-avx2,-march=core-avx2,$(MACHINE_CFLAGS))
  67         endif
  68         ifeq ($(shell test $(GCC_VERSION) -lt 46 && echo 1), 1)
  69                 MACHINE_CFLAGS := $(patsubst -march=corei7-avx,-march=core2 -maes -mpclmul -mavx,$(MACHINE_CFLAGS))
  70                 MACHINE_CFLAGS := $(patsubst -march=corei7,-march=core2 -maes -mpclmul,$(MACHINE_CFLAGS))
  71         endif
  72         ifeq ($(shell test $(GCC_VERSION) -lt 45 && echo 1), 1)
  73                 MACHINE_CFLAGS := $(patsubst -march=atom,-march=core2 -mssse3,$(MACHINE_CFLAGS))
  74         endif
  75         ifeq ($(shell test $(GCC_VERSION) -lt 44 && echo 1), 1)
  76                 MACHINE_CFLAGS := $(filter-out -mavx -mpclmul -maes,$(MACHINE_CFLAGS))
  77                 ifneq ($(findstring SSE4_2, $(CPUFLAGS)),)
  78                         MACHINE_CFLAGS += -msse4.2
  79                 endif
  80                 ifneq ($(findstring SSE4_1, $(CPUFLAGS)),)
  81                         MACHINE_CFLAGS += -msse4.1
  82                 endif
  83         endif
  84         ifeq ($(shell test $(GCC_VERSION) -lt 43 && echo 1), 1)
  85                 MACHINE_CFLAGS := $(filter-out -msse% -mssse%,$(MACHINE_CFLAGS))
  86                 MACHINE_CFLAGS := $(patsubst -march=core2,-march=generic,$(MACHINE_CFLAGS))
  87                 MACHINE_CFLAGS += -msse3
  88         endif
  89         ifeq ($(shell test $(GCC_VERSION) -lt 42 && echo 1), 1)
  90                 MACHINE_CFLAGS := $(filter-out -march% -mtune% -msse%,$(MACHINE_CFLAGS))
  91         endif
  92 endif