#find out GCC version
-GCC_VERSION = $(subst .,,$(shell $(CC) -dumpversion | cut -f1-2 -d.))
+GCC_MAJOR = $(shell echo __GNUC__ | $(CC) -E -x c - | tail -n 1)
+GCC_MINOR = $(shell echo __GNUC_MINOR__ | $(CC) -E -x c - | tail -n 1)
+GCC_VERSION = $(GCC_MAJOR)$(GCC_MINOR)
# if GCC is older than 4.x
ifeq ($(shell test $(GCC_VERSION) -lt 40 && echo 1), 1)
# GCC 4.5.x - added support for atom
# GCC 4.6.x - added support for corei7, corei7-avx
# GCC 4.7.x - added support for fsgsbase, rdrnd, f16c, core-avx-i, core-avx2
-
+# GCC 4.9.x - added support for armv8-a+crc
+#
+ ifeq ($(shell test $(GCC_VERSION) -le 49 && echo 1), 1)
+ MACHINE_CFLAGS := $(patsubst -march=armv8-a+crc,-march=armv8-a+crc -D__ARM_FEATURE_CRC32=1,$(MACHINE_CFLAGS))
+ endif
ifeq ($(shell test $(GCC_VERSION) -le 47 && echo 1), 1)
MACHINE_CFLAGS := $(patsubst -march=core-avx-i,-march=corei7-avx,$(MACHINE_CFLAGS))
MACHINE_CFLAGS := $(patsubst -march=core-avx2,-march=core-avx2,$(MACHINE_CFLAGS))
ifeq ($(shell test $(GCC_VERSION) -lt 42 && echo 1), 1)
MACHINE_CFLAGS := $(filter-out -march% -mtune% -msse%,$(MACHINE_CFLAGS))
endif
-endif
+ # Disable thunderx PMD for gcc < 4.7
+ ifeq ($(shell test $(GCC_VERSION) -lt 47 && echo 1), 1)
+ CONFIG_RTE_LIBRTE_THUNDERX_NICVF_PMD=d
+ endif
+endif