Compiling File system with buildroot（MYZR-IMX6-EK200)

[cherryzheng]

Host Platform： UBUNTU14.04
Hardware Platform：MYZR MY-IMX6-EK200
Compiler:      gcc-linaro-arm-linux-gnueabihf-4.9-2014.09_linux.tar.xz
buildroot version：buildroot-2017.02.5.tar.bz2

1. Decompression
$ mkdir ~/IMX6/
$ tar xvf ~/IMX6/gcc-linaro-arm-linux-gnueabihf-4.9-2014.09_linux.tar.xz

$ mkdir ~/buildroot
$ cd ~/buildroot
$ tar jxvf  buildroot-2017.02.5.tar.bz2
$ cd buildroot-2017.02.5/

2. Configuration
$ make imx6q-sabresd_defconfig
$ make menuconfig

Use of external compilers gcc-linaro-arm-linux-gnueabihf-4.9-2014.09_linux.tar.xz
Toolchain--->
set up Toolchain type as External toolchain
Toolchain as Custom toolchain
Toolchain path为/home/linyn/IMX6/gcc-linaro-arm-linux-gnueabihf-4.9-2014.09_linux/
choose【*】Toolchain has C++ support?

Main attention: External toolchain kernel headers series (3.1.x)Set this option, select the kernel version number of the compile tool, file

   ~/IMX6/gcc-linaro-arm-linux-gnueabihf-4.9-2014.09_linux/arm-linux-gnueabihf/libc/usr/include/linux/version.h
    Hold the version number (each compile tool has this file in decimal), and you can see what the version number is by converting it to hexadecimal, as my version.h is

   #define LINUX_VERSION_CODE 196865
    #define KERNEL_VERSION(a,b,c) (((a) << 16) + ((b) << 8) + (c))
  The 196609 version of hexadecimal is 0x30101, and that version number is 3.01.01which is 3.0.1, so choose 3.1.x here. See picture "configuration 1"

System configuration--->
(myzr) System hostname  Set up host name
/dev management (Dynamic using devtmpfs + mdev)   kernel configuration support medv，system also configured mdev
Run a getty (login prompt) after boot --->
(ttymxc0) TTY port               set up log in serial port
         Baudrate (115200)  --->      

Not compile kernel
Kernel--->
[] Linux Kernel  uncheck

Not compile U-BOOT
Bootloaders --->
[] U-Boot          uncheck

$ make -j4              //Compiled with 4 threads
Result produce output/images/rootfs.tar
Look at the picture "result 1" and "result 2" (result 2 is not compile kernel report error, ignore it).

Finally revise rootfs
vim etc/issue 
Welcome to MY-IMX6-EK200

vim etc/profile

if [ "$PS1" ]; then
        if [ "`id -u`" -eq 0 ]; then
         export PS1='\u@\h:\w\# '
        else
         export PS1='\u@\h:\w\$ '
        fi
fi

Finally compressing burn in, log in with root, default no password

VFS: Mounted root (ext3 filesystem) on device 179:2.
devtmpfs: mounted
Freeing unused kernel memory: 396K (809c6000 - 80a29000)
Starting logging: OK
Starting mdev...
Initializing random number generator... random: dd urandom read with 47 bits of entropy available
done.
Starting network: OK
Welcome to MY-IMX6-EK200
myzr login: root
root@myzr:~# 
root@myzr:~# 
root@myzr:~# ls
root@myzr:~# ls /
bin         lib         lost+found  opt         run         tmp
dev         lib32       media       proc        sbin        usr
etc         linuxrc     mnt         root        sys         var
Look at the picture "Log in"

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