# SUBARCH tells the usermode build what the underlying arch is.  That is set
  # first, and if a usermode build is happening, the "ARCH=um" on the command
  # line overrides the setting of ARCH below.  If a native build is happening,
  # then ARCH is assigned, getting whatever value it gets normally, and
  # SUBARCH is subsequently ignored.
  
  SUBARCH := $(shell uname -m | sed -e s/i.86/x86/ -e s/x86_64/x86/ \
  				  -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/riscv.*/riscv/)