【接上一章节MY-IMX6 Linux-4.1.15 编译参考手册（1）】
3 u-boot编译
3.1 编译前的准备
创建编译工作目录
=====> Input:
mkdir ~/my-work/02_source/ -p
解压源码包到工作目录
=====> Input:
tar xf u-boot-2016.03-svn*.tar.bz2 -C ~/my-work/02_source/
3.2 编译u-boot目标文件
进入源码目录
=====> Input:
cd ~/my-work/02_source/u-boot-2016.03
生成目标开发板的 .config 文件
=====> Input:
make myimx6ek140p-6y-256m-emmc_defconfig
=====> Output:
HOSTCC scripts/basic/fixdep
HOSTCC scripts/kconfig/conf.o
SHIPPED scripts/kconfig/zconf.tab.c
SHIPPED scripts/kconfig/zconf.lex.c
SHIPPED scripts/kconfig/zconf.hash.c
HOSTCC scripts/kconfig/zconf.tab.o
HOSTLD scripts/kconfig/conf
#
# configuration written to .config
#
【注意】：上面 make 后面的 myimx6ek140p-6y-256m-emmc_defconfig 改为与开发板型号对应的配置文件。
********** MY-IMX6-EK140 **********
myimx6ek140-6g-128m-emmc_defconfig myimx6ek140-6y-128m-emmc_defconfig
myimx6ek140-6g-128m-nand_defconfig myimx6ek140-6y-128m-nand_defconfig
myimx6ek140-6g-256m-emmc_defconfig myimx6ek140-6y-256m-emmc_defconfig
myimx6ek140-6g-256m-nand_defconfig myimx6ek140-6y-256m-nand_defconfig
myimx6ek140-6g-512m-emmc_defconfig myimx6ek140-6y-512m-emmc_defconfig
myimx6ek140-6g-512m-nand_defconfig myimx6ek140-6y-512m-nand_defconfig
********** MY-IMX6-EK140P **********
myimx6ek140p-6g-128m-emmc_defconfig myimx6ek140p-6y-128m-emmc_defconfig
myimx6ek140p-6g-128m-nand_defconfig myimx6ek140p-6y-128m-nand_defconfig
myimx6ek140p-6g-256m-emmc_defconfig myimx6ek140p-6y-256m-emmc_defconfig
myimx6ek140p-6g-256m-nand_defconfig myimx6ek140p-6y-256m-nand_defconfig
myimx6ek140p-6g-512m-emmc_defconfig myimx6ek140p-6y-512m-emmc_defconfig
myimx6ek140p-6g-512m-nand_defconfig myimx6ek140p-6y-512m-nand_defconfig
********** MY-IMX6-EK200 **********
myimx6ek200-6q-1g_defconfig myimx6ek200-6q-2g_defconfig myimx6ek200-6q-512m_defconfig
myimx6ek200-6u-1g_defconfig myimx6ek200-6u-2g_defconfig myimx6ek200-6u-512m_defconfig
myimx6ek200-6s-512m_defconfig myimx6ek200-6s-1g_defconfig myimx6ek200-6s-128m_defconfig
myimx6ek200-6qp-1g_defconfig myimx6ek200-6qp-2g_defconfig myimx6ek200-6qp-512m_defconfig
********** MY-IMX6-EK314 **********
myimx6ek314-6q-1g_defconfig myimx6ek314-6q-2g_defconfig myimx6ek314-6q-512m_defconfig
myimx6ek314-6u-1g_defconfig myimx6ek314-6u-2g_defconfig myimx6ek314-6u-512m_defconfig
myimx6ek314-6s-512m_defconfig myimx6ek314-6s-1g_defconfig myimx6ek314-6s-128m_defconfig
myimx6ek314-6qp-1g_defconfig myimx6ek314-6qp-2g_defconfig myimx6ek314-6qp-512m_defconfig
********** MY-IMX6-EK336 **********
myimx6ek336-6q-1g_defconfig myimx6ek336-6q-2g_defconfig myimx6ek336-6q-512m_defconfig
执行编译
=====> Input:
make
=====> Output:
scripts/kconfig/conf --silentoldconfig Kconfig
CHK include/config.h
UPD include/config.h
GEN include/autoconf.mk
GEN include/autoconf.mk.dep
CHK include/config/uboot.release
CHK include/generated/timestamp_autogenerated.h
CFG u-boot.cfg
......
LD u-boot
OBJCOPY u-boot-nodtb.bin
OBJCOPY u-boot.srec
SYM u-boot.sym
COPY u-boot.bin
CFGS board/myzr/myimx6/myimx6a7-6y-ddr3.cfg.cfgtmp
MKIMAGE u-boot.imx
Note: 如果有提示 “cc1: error”，通常是交叉编译工具的配置没生效，可以按前面 “交叉编译工具链安装” 中的 “source 工具链配置文件” 操作一次后再执行此步骤。
u-boot 目标文件
u-boot.imx 即目标文件。
3.3 编译u-boot环境变量脚本
=====> Input:
mkimage -A arm -O linux -T script -C none -a 0 -e 0 -n "myzr bootscripts" -d board/myzr/bootscripts/myimx6a7_l4115_emmc_script.cmd my_environment_emmc.scr
=====> Output:
Image Name: myzr bootscripts
Created: Wed Jan 2 09:40:40 2019
Image Type: ARM Linux Script (uncompressed)
Data Size: 1450 Bytes = 1.42 kB = 0.00 MB
Load Address: 00000000
Entry Point: 00000000
Contents:
Image 0: 1442 Bytes = 1.41 kB = 0.00 MB
3.4 目标文件
u-boot.imx 和 my_environment_emmc.scr 即编译得到的目标文件，保存这两个文件
4 内核编译
4.1 编译前的准备
创建编译工作目录
=====> Input:
mkdir ~/my-work/02_source/ -p
解压源码包到工作目录
=====> Input:
tar xf linux-4.1.15-svn*.tar.bz2 -C ~/my-work/02_source/
4.2 编译内核目标文件
进入内核源码目录
=====> Input:
cd ~/my-work/02_source/linux-4.1.15
生成目标平台的 .config 文件
=====> Input:
make myimx6a9_defconfig
=====> Output:
HOSTCC scripts/basic/fixdep
HOSTCC scripts/kconfig/conf.o
SHIPPED scripts/kconfig/zconf.tab.c
SHIPPED scripts/kconfig/zconf.lex.c
SHIPPED scripts/kconfig/zconf.hash.c
HOSTCC scripts/kconfig/zconf.tab.o
HOSTLD scripts/kconfig/conf
#
# configuration written to .config
#
Note: 如果有“Can't find default configuration "arch/x86/configs” 的错误，是因为交叉编译工具链的配置没有生效，可以按前面 “交叉编译工具链安装” 中的 “source 工具链配置文件” 操作一次后再执行此步骤
【注意】：上面 make 后面的 myimx6a7_defconfig 改为与开发板型号对应的配置文件。
********** MY-IMX6-EK140、MY-IMX6-EK140P **********
myimx6a7_defconfig
********** MY-IMX6-EK200、MY-IMX6-EK314、MY-IMX6-EK336 **********
myimx6a9_defconfig
编译内核目标文件
=====> Input:
make zImage
=====> Output:
scripts/kconfig/conf --silentoldconfig Kconfig
CHK include/config/kernel.release
UPD include/config/kernel.release
WRAP arch/arm/include/generated/asm/auxvec.h
......
AS arch/arm/boot/compressed/piggy.lzo.o
LD arch/arm/boot/compressed/vmlinux
OBJCOPY arch/arm/boot/zImage
Kernel: arch/arm/boot/zImage is ready
内核目标文件
arch/arm/boot/zImage 即内核目标文件
【下章节为MY-IMX6 Linux-4.1.15 编译参考手册（3）】