
uname_M := $(shell uname -m 2>/dev/null || echo not)

RAW_ARCH := $(shell echo $(uname_M) | sed -e s/i.86/i386/ -e s/sun4u/sparc64/ \
                                  -e s/arm.*/arm/ -e s/sa110/arm/ \
                                  -e s/s390x/s390/ -e s/parisc64/parisc/ \
                                  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
                                  -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \
                                  -e s/tile.*/tile/ )

# Additional ARCH settings for x86
ifeq ($(RAW_ARCH),i386)
  ARCH ?= x86
endif

ifeq ($(RAW_ARCH),x86_64)
  ARCH ?= x86

  ifneq (, $(findstring m32,$(CFLAGS)))
    RAW_ARCH := x86_32
  endif
endif

ifeq ($(RAW_ARCH),sparc64)
  ARCH ?= sparc
endif

ARCH ?= $(RAW_ARCH)

LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
ifeq ($(LP64), 1)
  IS_64_BIT := 1
else
  IS_64_BIT := 0
endif