source build/envsetup.sh

lunch sabresd_6dq-user

make -j20

============================================

PLATFORM_VERSION_CODENAME=REL    //平台

PLATFORM_VERSION=6.0.

TARGET_PRODUCT=sabresd_6dq       //目标信息，也就是开发板上的

TARGET_BUILD_VARIANT=user

TARGET_BUILD_TYPE=release

TARGET_BUILD_APPS=

TARGET_ARCH=arm

TARGET_ARCH_VARIANT=armv7-a-neon

TARGET_CPU_VARIANT=cortex-a9

TARGET_2ND_ARCH=

TARGET_2ND_ARCH_VARIANT=

TARGET_2ND_CPU_VARIANT=

HOST_ARCH=x86_64　　　　　　　　//主机信息，也就是当前编译系统的电脑

HOST_OS=linux

HOST_OS_EXTRA=Linux-3.16.--generic-x86_64-with-Ubuntu-14.04-trusty

HOST_BUILD_TYPE=release

BUILD_ID=2.1.-ga-rc2

OUT_DIR=out

============================================

including ./abi/cpp/Android.mk ...

including ./art/Android.mk ...

including ./bionic/Android.mk ...

including ./bootable/recovery/Android.mk ...

including ./build/libs/host/Android.mk ...

including ./build/target/board/Android.mk ...

including ./build/target/product/security/Android.mk ...

including ./build/tools/Android.mk ...

。。。

including ./tools/external/fat32lib/Android.mk ...

No private recovery resources for TARGET_DEVICE sabresd_6dq
//编译内核的信息，这里可以看出ARCH,CROSS_COMPILE，最后生成的为uImage

make -C kernel_imx -j20 uImage ARCH=arm CROSS_COMPILE=`pwd`/prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/bin/arm-linux-androideabi- LOADADDR=0x10008000 KCFLAGS=-mno-android

for ubootplat in imx6q:mx6qsabresdandroid_config imx6dl:mx6dlsabresdandroid_config imx6q-ldo:mx6qsabresdandroid_config imx6qp:mx6qpsabresdandroid_config; do \

        UBOOT_PLATFORM=`echo $ubootplat | cut -d':' -f1`; \

        UBOOT_CONFIG=`echo $ubootplat | cut -d':' -f2`; \

        echo ; \

        echo ; \
　　　　 //清除uboot

        make -C bootable/bootloader/uboot-imx/ distclean ARCH=arm CROSS_COMPILE=`pwd`/prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/bin/arm-linux-androideabi-; \

        //配置uboot，就类似于kernel的make menuconfig
　　　　 make -C bootable/bootloader/uboot-imx/ $UBOOT_CONFIG ARCH=arm CROSS_COMPILE=`pwd`/prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/bin/arm-linux-androideabi-; \

        //编译uboot
　　　　 make -C bootable/bootloader/uboot-imx/ ARCH=arm CROSS_COMPILE=`pwd`/prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/bin/arm-linux-androideabi-; \

        install -D bootable/bootloader/uboot-imx/u-boot.imx out/target/product/sabresd_6dq/u-boot-$UBOOT_PLATFORM.imx; \

        install -D bootable/bootloader/uboot-imx/u-boot.imx out/target/product/sabresd_6dq/u-boot.imx; \

    done

make[]: Entering directory `/home/hejin/myandroid/bootable/bootloader/uboot-imx'

Copy: out/target/product/sabresd_6dq/root/fstab.freescale

  CLEAN   examples/standalone

  CLEAN   tools

  CLEAN   tools/lib tools/common

  CLEAN   scripts/basic

  CLEAN   scripts/kconfig

  CLEAN   u-boot u-boot.bin u-boot.imx u-boot.lds u-boot.map u-boot.srec System.map

。。。

 HOSTCC  tools/mkimage.o

  HOSTCC  tools/proftool

  HOSTCC  tools/lib/crc32.o

  HOSTCC  tools/common/bootm.o

Image Name:   Linux-4.1.-g419e1f7-dirty

Created:      Tue Feb  ::

Image Type:   ARM Linux Kernel Image (uncompressed)

Data Size:     Bytes = 8511.32 kB = 8.31 MB

Load Address:

Entry Point:

  Image arch/arm/boot/uImage is ready

make[]: Leaving directory `/home/hejin/myandroid/kernel_imx'

  HOSTCC  tools/lib/fdtdec_common.o
//编译设备树，跟上面类似

make -C kernel_imx dtbs ARCH=arm CROSS_COMPILE=`pwd`/prebuilts/gcc/linux-x86/arm/arm-linux-androideabi-4.9/bin/arm-linux-androideabi- LOADADDR=0x10008000 KCFLAGS=-mno-android

  HOSTCC  tools/lib/fdtdec.o

  HOSTCC  tools/common/image-fit.o

  HOSTCC  tools/common/image.o

  HOSTCC  tools/lib/md5.o

  HOSTCC  tools/lib/sha1.o