環境：ubuntu16.04
交叉編譯器：gcc-linaro4.9.4
編譯器路徑：/usr/local/arm/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabihf/bin
nfs掛載路徑：/home/arjun/linux/nfs/buildrootfs
客戶端地址：192.168.8.60
服務器地址：192.168.8.57
硬件主芯片：imx6ull 存儲：EMMC
測試linux內核文件和設備樹以及nfs服務器可以使用
setenv mybootnfs 'nfs 80800000 192.168.8.57:/home/arjun/linux/nfs/zImage;nfs 83000000 192.168.8.57:/home/arjun/linux/nfs/imx6ull-arjun-emmc.dtb;bootz 80800000 - 83000000'
run mybootnfs //開始測試
列出支持的芯片
make list-defconfigs
打開圖形界面配置
make menuconfig
出現一下錯誤
*** Unable to find the ncurses libraries or the
*** required header files.
*** 'make menuconfig' requires the ncurses libraries.
***
*** Install ncurses (ncurses-devel or libncurses-dev
*** depending on your distribution) and try again.
安裝庫文件
apt-get install libncurses5-dev
初步選項配置
Target options --->
Target Architecture (ARM (little endian)) --->
Target Binary Format (ELF) --->
Target Architecture Variant (cortex-A7) --->
Target ABI (EABIhf) --->
Floating point strategy (NEON/VFPv4) --->
ARM instruction set (ARM) --->
Toolchain --->
Toolchain type (External toolchain) --->
Toolchain (Custom toolchain) --->
Toolchain origin (Pre-installed toolchain) --->
(/usr/local/arm/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabihf) Toolchain path
(arm-linux-gnueabihf) Toolchain prefix
External toolchain gcc version (4.9.x) --->
External toolchain kernel headers series (4.1.x) --->
External toolchain C library (glibc/eglibc) --->
[*] Toolchain has SSP support? (NEW)
[*] Toolchain has RPC support? (NEW)
[*] Toolchain has C++ support?
[*] Enable MMU support (NEW)
System configuration --->
(arjun_imx6ull) System hostname
(Welcome to Arjun i.mx6ull) System banner
Init system (BusyBox) --->
/dev management (Dynamic using devtmpfs + mdev) --->
[*] Enable root login with password
(123456) Root password
Filesystem images --->
[*] ext2/3/4 root filesystem
ext2/3/4 variant (ext4) --->
Kernel --->
[ ] Linux Kernel
Bootloaders --->
[ ] U-Boot
編譯
make 漫長等待
開發板sd卡uboot啓動 NFS掛載buildroot生成的根文件系統
bootargs=console=tty1 console=ttymxc0,115200 root=/dev/nfs rw nfsroot=192.168.8.57:/home/arjun/linux/nfs/buildrootfs ip=192.168.8.60:192.168.8.57:192.168.8.1:255.255.255.0::eth0:off
setenv bootargs 'console=tty1 console=ttymxc0,115200 root=/dev/nfs rw nfsroot=192.168.8.57:/home/arjun/linux/nfs/buildrootfs ip=192.168.8.60:192.168.8.57:192.168.8.1:255.255.255.0::eth0:off'
saveenv
建議保存 buildroot-xxx/dl 文件夾，裏面包含了庫，軟件安裝包以及使用圖形界面時候保存配置文件 .config，另存文件名後下次使用修改爲.config 加快配置
添加其他第三方軟件和庫
Target packages --->
Libraries --->
Audio/Sound --->
--- alsa-lib
(/dev/snd) directory with ALSA device files
(all) built PCM plugins
(all) built control plugins
[*] aload
-*- mixer
-*- pcm
-*- rawmidi
[*] hwdep
-*- seq
[*] alisp
[*] old-symbols
Audio and video applications --->
--- alsa-utils
[*] alsaconf
[*] aconnect
[*] alsactl
[*] alsaloop
[*] alsamixer
[*] alsaucm
[*] alsatplg
[*] amidi
[*] amixer
[*] aplay/arecord
[*] aplaymidi
[*] arecordmidi
[*] aseqdump
[*] aseqnet
[*] bat
[*] iecset
[*] speaker-test
buildroot配置下busybox安裝包
busybox 安裝包位置
ls /buildrootfs/dl/busybox busybox-1.29.3.tar.bz2
busybox解壓文件位置
/output/build/busybox-1.29.3
buildroot添加busybox配置
位置/output/build/busybox-1.29.3/Makefile
添加編譯環境，編譯器路徑
164 CROSS_COMPILE ?=/usr/local/arm/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabihf/bin/arm/arm-linux-gnueabihf-
190 ARCH ?=arm
busybox 支持中文
vim libbb/printable_string.c
30 break;
31 // if (c >= 0x7f)
32 // break;
33 s++;
43 if (c == '\0')
44 break;
45 // if (c < ' ' || c >= 0x7f)
46 if(c < ' ')
47 *d = '?';
48 d++;
使能 unicode碼
# vim libbb/unicode.c
1022 // *d++ = (c >= ' ' && c < 0x7f) ? c : '?';
1023 *d++ = (c>=' ')?c:'?';
1024 src++;
1025 }
1026 *d = '\0';
1030 unsigned char c = *d;
1031 // if (c < ' ' || c >= 0x7f)
1032 if(c < ' ')
1033 *d = '?';
1034 d++;
busybox默認配置
make defconfig
圖形配置界面
make menuconfig
Settings --->
--- Library Tuning
[*] vi-style line editing commands
[*] Support Unicode
[*] Check $LC_ALL, $LC_CTYPE and $LANG environment variables
--- Build Options
[ ] Build static binary (no shared libs)
Linux Module Utilities --->
[ ] Simplified modutils
Linux System Utilities --->
[*] mdev (16 kb)
[*] Support /etc/mdev.conf
[*] Support subdirs/symlinks
[*] Support regular expressions substitutions when renaming device
[*] Support command execution at device addition/removal
[*] Support loading of firmware
位置buildrootfs目錄下
查看buildroot下包含的可以編譯軟件
make show-targets
alsa-lib alsa-utils busybox host-fakeroot host-makedevs host-patchelf ifupdown-scripts initscripts linux-headers skeleton skeleton-init-common skeleton-init-sysv toolchain toolchain-buildroot uclibc rootfs-tar
編譯busybox
make busybox
再次編譯buildroot
make
編譯好的根文件目錄 /output/image/rootfs.tar
將rootfs.tar 拷貝到/home/arjun/linux/nfs/buildrootfs解壓
tar -vxf rootfs.tar
測試buildroot根文件系統
ping www.baidu.com
出現錯誤 ping: bad address 'www.baidu.com'
修改文件
vi /etc/resolv.conf
nameserver 114.114.114.114
nameserver 192.168.8.1