利用buildroot构建rootfs:

https://blog.csdn.net/qq_28992301/article/details/52143398

buildroot配置实例:

http://blog.sina.com.cn/s/blog_14f1cd81a0102xnjs.html

buildroot使用介绍:

http://www.cnblogs.com/arnoldlu/p/9553995.html

buildroot管理uboot+kernel+rootfs:

https://www.cnblogs.com/kent-hu/p/9393513.html

buildroot使用详解:

https://www.cnblogs.com/chencanjian/p/6060448.html

buildroot构建项目（一）---buildroot介绍:

https://www.cnblogs.com/kele-dad/p/8231434.html

①Incorrect selection of kernel headers: expected 3.4.x, got 2.6.x

https://blog.csdn.net/qq_23235811/article/details/79713581

vi arm-linux-gcc-4.3.2/arm-none-linux-gnueabi/libc/usr/include/linux/version.hs

修改：

//#define LINUX_VERSION_CODE 132634

#define LINUX_VERSION_CODE  197634

②Incorrect selection of the C library

make menuconfig选择glibc

③make menuconfig

BR2_TOOLCHAIN_EXTERNAL_INET_RPC

④ln: 无法创建符号链接'/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/host/arm-buildroot-linux-gnueabi/sysroot/usr/lib': 没有那个文件或目录

mkdir output/host/arm-buildroot-linux-gnueabi/sysroot/usr/lib -p

⑤make[1]: 进入目录“/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/build/busybox-1.29.3”

/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/unistd.h:203: error: conflicting types for 'gid_t'

/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/linux/types.h:27: error: previous declaration of 'gid_t' was here

/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/host/arm-buildroot-linux-gnueabi/sysroot/usr/include/unistd.h:208: error: conflicting types for 'uid_t'

解决办法：

   使用自己原有并经过测试的busybox-1.20.0.tar.bz2，只要修改buildroot/package/busybox/busybox.mk文件即可，具体修改如下：

#BUSYBOX_VERSION = 1.29.3

#BUSYBOX_SITE = http://www.busybox.net/downloads

BUSYBOX_VERSION = 1.20.0

BUSYBOX_SITE = /home/mapfac/Workspace/vision_sdk/jz2440/wbak

BUSYBOX_SITE_METHOD = local

BUSYBOX_SOURCE = busybox-$(BUSYBOX_VERSION).tar.bz2

BUSYBOX_LICENSE = GPL-2.0

BUSYBOX_LICENSE_FILES = LICENSE

为了测试这个问题是在编译busybox产生的，可以到buildroot/output/build/busybox-1.20.0/目录下手动配置后，在make编译测一下：

make menuconfig

make CROSS_COMPILE=/home/mapfac/Workspace/vision_sdk/jz2440/toolchains/arm-linux-gcc-4.3.2/bin/arm-linux-

make CROSS_COMPILE=/home/mapfac/Workspace/vision_sdk/jz2440/toolchains/arm-linux-gcc-4.3.2/bin/arm-linux- CONFIG_PREFIX=/home/mapfac/Workspace/vision_sdk/jz2440/busybox_test install

默认busybox配置文件：

package/busybox/busybox.config  

设置busybox配置文件：

/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/build/busybox-1.20.0/jz2440_defconfig

⑥/home/mapfac/Workspace/vision_sdk/jz2440/toolchains/arm-linux-gcc-4.3.2/bin/../lib/gcc/arm-none-linux-gnueabi/4.3.2/../../../../arm-none-linux-gnueabi/bin/ld: cannot find /lib/libc.so.6 inside 

/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/host/arm-buildroot-linux-gnueabi/sysroot collect2: ld returned 1 exit status

工具链下可以搜索到：

./arm-linux-gcc-4.3.2/arm-none-linux-gnueabi/libc/lib/libc.so.6

make clean解决

⑦busybox 1.20.0 Installing to target

# Use the 'noclobber' install rule, to prevent BusyBox from overwriting

# any full-blown versions of apps installed by other packages.

PATH="/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/host/bin:/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/host/sbin:/usr/local/bin:/usr/bin:/bin:/usr/local/games:/usr/games:/sbin:/usr/sbin" CFLAGS="-D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os  " CFLAGS_busybox="" /usr/bin/make -j5 CC="/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/host/bin/arm-linux-gcc" ARCH=arm PREFIX="/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/target" EXTRA_LDFLAGS="" CROSS_COMPILE="/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/host/bin/arm-linux-" CONFIG_PREFIX="/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/target" SKIP_STRIP=y -C /home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/build/busybox-1.20.0 install-noclobber

make[1]: 进入目录“/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/build/busybox-1.20.0”

make[1]: *** 没有规则可制作目标“install-noclobber”。 停止。

make[1]: 离开目录“/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/build/busybox-1.20.0”

make: *** [package/pkg-generic.mk:319：/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/build/busybox-1.20.0/.stamp_target_installed] 错误 2

解决办法：buildroot/package/busybox/busybox.mk中修改

define BUSYBOX_INSTALL_TARGET_CMDS

# Use the 'noclobber' install rule, to prevent BusyBox from overwriting

# any full-blown versions of apps installed by other packages.

#$(BUSYBOX_MAKE_ENV) $(MAKE) $(BUSYBOX_MAKE_OPTS) -C $(@D) install-noclobber

$(BUSYBOX_MAKE_ENV) $(MAKE) $(BUSYBOX_MAKE_OPTS) -C $(@D) install

....

endef

⑧设置uboot、kernel源码路径

由于打算采用本地源码包进行uboot、kernel的编译，在U-boot Version和Kernel version配置时做了很多尝试都没有成功，最后都采用了Custom version:

[*] U-Boot

         Build system (Legacy)  ---> 

   (smdk2440) U-Boot board name                     // 这里对应uboot配置smdk2440.h

         U-Boot Version (Custom version)  --->

   (2012.04.01) U-Boot version

   (/home/mapfac/Workspace/vision_sdk/jz2440/wbak/u-boot-2012.04.01_jz2440_camera.patch) Custom U-Boot patches

[*] Linux Kernel

         *** Linux kernel in thumb mode may be broken with binutils >= 2.29 ***

         Kernel version (Custom version)  --->

   (3.4.2) Kernel version

   (/home/mapfac/Workspace/vision_sdk/jz2440/wbak/linux-3.4.2_jz2440_alsa.patch) Custom kernel patches 

         Kernel configuration (Using a custom (def)config file)  --->

   (/home/mapfac/Workspace/vision_sdk/jz2440/linux-3.4.2/config_ok) Configuration file path  

⑨手动编译各模块都

编译buildroot:

make s3c2440_defconfig

make

编译uboot:

make ARCH=arm CROSS_COMPILE=/home/mapfac/Workspace/vision_sdk/jz2440/toolchains/arm-linux-gcc-4.3.2/bin/arm-linux- distclean

make ARCH=arm CROSS_COMPILE=/home/mapfac/Workspace/vision_sdk/jz2440/toolchains/arm-linux-gcc-4.3.2/bin/arm-linux- smdk2440_config

make ARCH=arm CROSS_COMPILE=/home/mapfac/Workspace/vision_sdk/jz2440/toolchains/arm-linux-gcc-4.3.2/bin/arm-linux-

编译kernel:

#!/bin/sh

make CROSS_COMPILE=/home/mapfac/Workspace/vision_sdk/jz2440/toolchains/arm-linux-gcc-4.3.2/bin/arm-linux- s3c2440_defconfig

make CROSS_COMPILE=/home/mapfac/Workspace/vision_sdk/jz2440/toolchains/arm-linux-gcc-4.3.2/bin/arm-linux- uImage

编译busyroot(进入busyroot目录单独编译):

make menuconfig

make CROSS_COMPILE=/home/mapfac/Workspace/vision_sdk/jz2440/toolchains/arm-linux-gcc-4.3.2/bin/arm-linux-

make CROSS_COMPILE=/home/mapfac/Workspace/vision_sdk/jz2440/toolchains/arm-linux-gcc-4.3.2/bin/arm-linux- CONFIG_PREFIX=/home/mapfac/Workspace/vision_sdk/jz2440/busybox_test install

结束：

stage 2: creating image '/home/mapfac/Workspace/vision_sdk/jz2440/buildroot/output/images/rootfs.yaffs2'

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operation complete,

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