MY-IMX6 Linux-3.0.35 Build Manual

Prepare source code pacakge

---

3.0.35 Version code

u-boot Source code

Filename:u-boot-2009.08--svn*.tar.xz

kernel Source code

Filename：linux-3.0.35--svn*.tar.xz

Cross compilation tool

Filename：gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12.tar.bz2

Configuration compilation environment

---

Prepare source code

Prepare source code package

1）Create working directory

• Create ~/my-imx6 as working directory
  

$ mkdir ~/my-imx6

• Create ~/my-imx6/02_source/imx_3.0.35_4.1.0 as source code directory.
  

$ mkdir ~/my-imx6/02_source/imx_3.0.35_4.1.0 -p

• Create ~/my-imx6/03_tools as tool directory
  

$ mkdir ~/my-imx6/03_tools -p

2）Copy source code package to the development host
Do it in this step in your own way.
Tip：this step is to copy “02_source code”from network disk to “~/my-imx6/02_source/imx_3.0.35_4.1.0”in development host，and copy “03_tool/toolchain”to “~/my-imx6/03_tools”.in development host.

Decompress source code package

1）Decompress u-boot source code and kernel source code.
$ cd ~/my-imx6/02_source/imx_3.0.35_4.1.0
$ tar xf u-boot-2009.08--svn*.tar.xz
$ tar xf linux-3.0.35--svn*.tar.xz

2）Decompress cross compiler tool
$ cd ~/my-imx6/03_tools/
$ tar jxf gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12.tar.bz2

Development environment configuration

Install package needed

1）List of updated source
$ sudo apt-get update

After update,it will look like below：

2）Install aptitude package management tool and ia32-lib.
Tips：if Linux of compiler host is 32bit，you can skip this step.

• Install aptitude package management tool.
  

$ sudo apt-get –y install aptitude

• Install ia32-libs with aptitude.
  

$ sudo aptitude –y install ia32-libs
Tips：following is the screenshots with re-execution of installation command after installation of aptitude and ia32-libs is finished.

3）Install mkimage tool
$ sudo apt-get -y install uboot-mkimage
Tips：following is the screenshots with re-execution of installation command after installation of mkimage tool is finished.

4）Install ncurses-dev
Instruction：make menuconfig is dependent on it.
$ sudo aptitude -y install ncurses-dev

Tips：following is the screenshots with re-execution of installation command after installation of ncurses-dev tool is finished.

Configure environment variables of MY-IMX6 compilation

1）Write platform information to a new configured file.
$ echo "export ARCH=arm" > ~/my-imx6/03_tools/myimx6_3035_build_env

2）Write compiler tool chain path to configured file.

• Enter cross compiler tool directory
  

$ cd ~/my-imx6/03_tools/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/

• Write path to configured file.
  

$ sed -i "\$a IMX6_GCC462_PATH=$PWD" ~/my-imx6/03_tools/myimx6_3035_build_env

• Write cross compiler tool to configured file
  

$ sed -i "\$a export CROSS_COMPILE=\$IMX6_GCC462_PATH/arm-none-linux-gnueabi-" ~/my-imx6/03_tools/myimx6_3035_build_env

3）View configured file
$ cat ~/my-imx6/03_tools/myimx6_3035_build_env

4）Figures

Note：If an error occurs in any step, need to delect ~/my-imx6/03_tools/myimx6_3035_build_env ，and operate again all steps of this segment.

Compile u-boot

---

Enter u-boot source code directory

$ cd ~/my-imx6/02_source/imx_3.0.35_4.1.0/u-boot-2009.08/

Validate configured file

• Execute source command
  

$ source ~/my-imx6/03_tools/myimx6_3035_build_env

• View compiler configuration
  

$ echo $ARCH
$ echo $CROSS_COMPILE

Tips：you can see that ARCH和CROSS_COMPILE is configured.

• Verify cross compiler tool configuration.
  

$${CROSS_COMPILE}gcc –v
Tips：you can see version information of cross compiler tool shown on terminal after execution of command.as below：

Remove u-boot configuration

$ make distclean

u-boot Configuration

• Evaluation board and its corresponding u-boot compiler configuration：
  

Evaluation board main model	CPU type-memory capacity	Corresponding u-boot configuration
MY-IMX6-EK200	6Q（quad. core）- 1G	myimx6ek200_6q_config
	6Q（quad core）- 2G	myimx6ek200_6q_2g_config
	6U（dual core tile）- 1G	myimx6ek200_6u_config
	6S（single core）- 512M	myimx6ek200_6s_config
MY-IMX6-EK314	6Q（quad.core）- 1G	myimx6ek314_6q_config
	6Q（quad.core）- 2G	myimx6ek314_6q_2g_config
	6U（dual core tile）- 1G	myimx6ek314_6u_config
	6S（single core）- 512M	myimx6ek314_6s_config

• MYIMX6EK200-6Qxx-1G configuration example：
  

$ make myimx6ek200_6q_config

Compilation

• Execute compilation
  

$ make
Tips：To speed up the compilation，add "-j4" after make.The Linux host used to compile is dual-core ,4 threads .So "-j" is followed by 4, which takes 4 threads to compile. The number behind "-j" is allocated based on system resources,but It should not exceed the maximum threads the host support.

• Complete compilation
  

Tips：u-boot compilation process will take a few minustes or so.

Target file

You can get the compiled file u-boot.bin with ls command after compilation.
$ ls

Compile kernel

---

Enter kernel source directory

$ cd ~/my-imx6/02_source/imx_3.0.35_4.1.0/linux-3.0.35/

Validate configured file

• Execute source command
  

$ source ~/my-imx6/03_tools/myimx6_3035_build_env

• View compiler configuration
  

$ echo $ARCH
$ echo $CROSS_COMPILE

Tips：you can see that ARCH和CROSS_COMPILE is configured

• Verify cross compiler tool configuration
  

$ ${CROSS_COMPILE}gcc –v

Tips：you can see version information of cross compiler tool shown on terminal after execution of command.as below：

Prepare for kernel configuration

• Remove kernel configuration
  

$ make distclean

• Generated.config file
  

Instructions：configuration files used for MY-IMX6-EK200 seires of evaluation board and MY-IMX6-EK314 series of evaluation board is myimx6_defconfig.
$ make myimx6_defconfig

Compile kernel

• Compile uImage
  

$ make uImage

Instruction：4 threads compilation is used in the screenshots.

• Complete compilation
  

• Target file
  

arch/arm/boot/uImage is the target file through compilation，you can view the file information with ls command.
$ ls arch/arm/boot/uImage –la

Compile module

• Compile
  

$ make
Instruction：4 threads compilation is used in the screenshots.

• Complete compilation
  

• Target file
  

The.ko file of each module is in the directory where code is located after compilation ，you can find the module compiled with find command after compilation,refering command as below：</span>
$ find -name *.ko

Linux application compilation

---

Write application

1) Create application directory
$ mkdir ~/my-imx6/02_source/application/ -p
$ cd ~/my-imx6/02_source/application/

2) Write application（here take hello.c as example）
Create hello.c and write following code and save：

1. include <stdio.h>
   

int main(int argc, char **argv)
{
　　　printf("Hello, MYZR!\n");
　　　
　　　return;
}

3)View code
$ cat hello.c

Validate compiler configured file

• Execute source command
  

$ source ~/my-imx6/03_tools/myimx6_3035_build_env

• View compiler configuration
  

$ echo $ARCH
$ echo $CROSS_COMPILE
Tips：you can see that ARCH和CROSS_COMPILE is configured

• Verify cross compiler tool configuration
  

$ ${CROSS_COMPILE}gcc –v

Tips：you can see version information of cross compiler tool shown on terminal after execution of command.as below：

Compile application

2) Compile
$ ${CROSS_COMPILE}gcc hello.c -o hello.out

Note：the above commands contain charater“$”，e.g“${CROSS_COMPILE}gcc”，which is the environment variable generated when referring to our source.

3) View type of target file
$ file hello.out

You can get the property of target file hello.out.

File system

---

File system instruction

File system package is located in image file folder in the network disk。as to type of file system supported and way of download please refer to《MY-IMX6 buring guide》.

Decompress file system to compiler host

1）Create directory of file system and enter.
$ mkdir ~/my-imx6/04_rootfs/ -p
$ cd ~/my-imx6/04_rootfs/

2）Copy file system to ~/my-imx6/04_rootfs/directory
This step sbould be done in your own way

3）Decompress file system to specified directory
$ mkdir rootfs
$ sudo tar jxf rootfs-linux.tar.bz2 -C rootfs

Add application to file system

$ cp ~/my-imx6/02_source/application/hello.out rootfs/app_test/

5）Re-pakcage file system
$ rm -rf rootfs-linux.tar.bz2
$ cd rootfs/
$ sudo tar cjf ../rootfs-linux.tar.bz2 *

Add module to file system

Prepare .ko file of module needed,as to other operations please refer to“add application to file system”.