Makefile.include

# use pushd from bash
SHELL := /bin/bash
CROSS_COMPILE ?= aarch64-linux-gnu-
ARCH := $(shell uname -m)

ifeq ($(ARCH), arm64)
  undefine CROSS_COMPILE
endif

ifeq ($(ARCH), aarch64)
  undefine CROSS_COMPILE
endif

ifdef VERBOSE
  quiet =
else
  quiet = quiet_
endif

CC := $(CROSS_COMPILE)gcc
LD := $(CROSS_COMPILE)ld
OBJCOPY := $(CROSS_COMPILE)objcopy

# escape single quote
squote  := "'"
escsq = $(subst $(squote),'\$(squote)',$1)

# echo command
# if $(quiet) equals `quiet_', short version is used, otherwise full one
echo-cmd = $(if $($(quiet)cmd_$(1)), \
	echo '  $(call escsq,$($(quiet)cmd_$(1)))';) 

# default sink stdout
       redirect :=
 quiet_redirect := exec 2>/dev/null 1>/dev/null;

# printing commands
cmd = @set -e; $(echo-cmd) $($(quiet)redirect) $(cmd_$(1)); \
	  echo 'cmd_$@ := $(cmd_$(1))' > $(@D)/.$(@F).cmd

# general command functions
quiet_cmd_mkdir = MKDIR   $(dir $@)
      cmd_mkdir = mkdir -p $(dir $@)
     rule_mkdir = $(if $(wildcard $(dir $@)),,@$(call echo-cmd,mkdir) $(cmd_mkdir))

quiet_cmd_objcopy = OBJCOPY $@
      cmd_objcopy = $(OBJCOPY) -S -O binary $^ $@

# arg: ldflag 
quiet_cmd_ld = LD      $@
      cmd_ld = $(LD) $2 $^ -o $@

# arg: cflag
quiet_cmd_cc = CC      $@
      cmd_cc = $(CC) -c $2 -o $@ $<

quiet_cmd_clean = CLEAN   $2
      cmd_clean = rm -rf $2