# Cross Compiler && Enviremont Set Up

## Architecture:ARM
`export ARCH=arm`
## Cross Compiler:gcc-arm-none-eabi-8-2018-q4-major
`export CROSS_COMPILE=/home/paul/opt/gcc-arm-none-eabi-8-2018-q4-major/bin/arm-none-eabi-`
## config
`make mq_imx_defconfig`

 501 ifeq ($(config-targets),1)
 502 # ===========================================================================
 503 # *config targets only - make sure prerequisites are updated, and descend
 504 # in scripts/kconfig to make the *config target
 505 
 506 # Read arch specific Makefile to set KBUILD_DEFCONFIG as needed.
 507 # KBUILD_DEFCONFIG may point out an alternative default configuration
 508 # used for 'make defconfig'
 509 include arch/$(SRCARCH)/Makefile
 510 export KBUILD_DEFCONFIG KBUILD_KCONFIG
 511 
 512 config: scripts_basic outputmakefile FORCE
 513     $(Q)$(MAKE) $(build)=scripts/kconfig $@
 514 
 515 %config: scripts_basic outputmakefile FORCE
 516     $(Q)$(MAKE) $(build)=scripts/kconfig $@
 517 
 518 else
 519 # ===========================================================================
 520 # Build targets only - this includes vmlinux, arch specific targets, clean
 521 # targets and others. In general all targets except *config targets.
 522 
 523 # If building an external module we do not care about the all: rule
 524 # but instead _all depend on modules
PHONY += all                                                                                                                                                                      
 ifeq ($(KBUILD_EXTMOD),)

### Log on terminal:

  HOSTCC  scripts/basic/fixdep
  HOSTCC  scripts/basic/bin2c
  HOSTCC  scripts/kconfig/conf.o
  HOSTCC  scripts/kconfig/zconf.tab.o
  HOSTLD  scripts/kconfig/conf
#
# configuration written to .config
#

## compile the `source code root`
`make -j8`