1ifndef ARCH
 2ARCH := $(shell uname -m 2>/dev/null || echo not)
 3endif
 4
 5ARCH := $(shell echo $(ARCH) | sed -e s/i.86/x86/ -e s/x86_64/x86 \
 6                                  -e s/sun4u/sparc/ -e s/sparc64/sparc/ \
 7                                  -e /arm64/!s/arm.*/arm/ -e s/sa110/arm/ \
 8                                  -e s/s390x/s390/ -e s/parisc64/parisc/ \
 9                                  -e s/ppc.*/powerpc/ -e s/mips.*/mips/ \
10                                  -e s/sh[234].*/sh/ -e s/aarch64.*/arm64/ \
11                                  -e s/tile.*/tile/ )
12
13LP64 := $(shell echo __LP64__ | ${CC} ${CFLAGS} -E -x c - | tail -n 1)
14ifeq ($(LP64), 1)
15  IS_64_BIT := 1
16else
17  IS_64_BIT := 0
18endif