查看“MY-IMX6 Linux-3.0.35 Build Manual”的源代码

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= '''Prepare source code pacakge'''=
----
== '''3.0.35 Version code'''==

=== u-boot Source code ===
Filename:u-boot-2009.08--svn*.tar.xz<br>

=== kernel Source code ===
Filename：linux-3.0.35--svn*.tar.xz<br>

=== Cross compilation tool===
Filename：gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12.tar.bz2<br>

= '''Configuration  compilation environment'''=
----
== '''Prepare source code'''==


=== Prepare source code package===
1）Create working directory<br>
*Create ~/my-imx6 as working directory <br>
$ mkdir ~/my-imx6<br>
[[File: myimx6l3035_build_2.1.1.1.jpg]]<br>
*Create ~/my-imx6/02_source/imx_3.0.35_4.1.0 as source code directory.<br>
$ mkdir ~/my-imx6/02_source/imx_3.0.35_4.1.0 -p<br>
[[File: myimx6l3035_build_2.1.1.2.jpg]]<br>
*Create ~/my-imx6/03_tools as tool directory<br>
$ mkdir ~/my-imx6/03_tools -p<br>
[[File: myimx6l3035_build_2.1.1.3.jpg]]<br>

2）Copy source code package to the development host<br>
Do it in this step in your own way.<br>
''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.<br>

=== Decompress source code package===
1）Decompress u-boot source code and kernel source code.<br>
$ cd ~/my-imx6/02_source/imx_3.0.35_4.1.0<br>
$ tar xf u-boot-2009.08--svn*.tar.xz<br>
$ tar xf linux-3.0.35--svn*.tar.xz<br>
[[File: myimx6l3035_build_2.1.2.1.jpg]]<br>

2）Decompress cross compiler tool <br>
$ cd ~/my-imx6/03_tools/<br>
$ tar jxf gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12.tar.bz2<br>
[[File: myimx6l3035_build_2.1.2.2.jpg]]<br>

== '''Development environment configuration'''==
=== Install package needed===
1）List of updated source <br>
$ sudo apt-get update<br>
[[File: myimx6l3035_build_2.2.1.1.jpg]]<br>
After update,it will look like below：<br>

[[File: myimx6l3035_build_2.2.1.2.jpg]]<br>

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

*Install aptitude package management tool.<br>
[[File: myimx6l3035_build_2.2.1.3.jpg]]<br>
$ sudo apt-get –y install aptitude<br>

* Install ia32-libs with aptitude.<br>
$ sudo aptitude –y install ia32-libs<br>
''Tips：following is the screenshots with re-execution of installation command after installation of aptitude and ia32-libs is finished.<br>
[[File: myimx6l3035_build_2.2.1.4.jpg]]<br>

3）Install mkimage tool<br>
$ sudo apt-get -y install uboot-mkimage<br>
''Tips：following is the screenshots with re-execution of installation command after installation of mkimage tool is finished.<br>
[[File: myimx6l3035_build_2.2.1.5.jpg]]<br>

4）Install ncurses-dev<br>
<span style="color: red">Instruction：make menuconfig is dependent on it.</span><br>
$ sudo aptitude -y install ncurses-dev<br>

''Tips：following is the screenshots with re-execution of installation command after installation of ncurses-dev tool is finished.<br>
[[File: myimx6l3035_build_2.2.1.6.jpg]]<br>

=== Configure environment variables of MY-IMX6 compilation===
1）Write platform information to a new configured file.<br>
$ echo "export ARCH=arm" > ~/my-imx6/03_tools/myimx6_3035_build_env<br>

2）Write compiler tool chain path to configured file.<br>
* Enter cross compiler tool directory <br>
$ cd ~/my-imx6/03_tools/gcc-4.6.2-glibc-2.13-linaro-multilib-2011.12/fsl-linaro-toolchain/bin/<br>
* Write path to configured file.<br>
$ sed -i "\$a IMX6_GCC462_PATH=$PWD" ~/my-imx6/03_tools/myimx6_3035_build_env<br>
* Write cross compiler tool to configured file<br>
$ sed -i "\$a export CROSS_COMPILE=\$IMX6_GCC462_PATH/arm-none-linux-gnueabi-" ~/my-imx6/03_tools/myimx6_3035_build_env<br>

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

4）Figures<br>
[[File: myimx6l3035_build_2.2.2.1.jpg]]<br>

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.<br>


= '''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/<br>
[[File: myimx6l3035_build_3.1.0.1.jpg]]<br>


== '''Validate configured file'''==
* Execute source command<br>
$ source ~/my-imx6/03_tools/myimx6_3035_build_env<br>
[[File: myimx6l3035_build_3.2.0.1.jpg]]<br>

* View compiler configuration<br>
$ echo $ARCH<br>
$ echo $CROSS_COMPILE<br>

''Tips：you can see that ARCH和CROSS_COMPILE is configured.<br>
[[File: myimx6l3035_build_3.2.0.2.jpg]]<br>

* Verify cross compiler tool configuration.<br>
$${CROSS_COMPILE}gcc –v<br>
''Tips：you can see version information of cross compiler tool shown on terminal after execution of command.as below：<br>
[[File: myimx6l3035_build_3.2.0.3.jpg]]<br>


== '''Remove u-boot configuration'''==
$ make distclean<br>
[[File: myimx6l3035_build_3.3.0.1.jpg]]<br>


== '''u-boot Configuration'''==
* Evaluation board and its corresponding u-boot compiler configuration：<br>

{| class="wikitable"
|-
!Evaluation board main model	
!CPU type-memory capacity		
!Corresponding u-boot configuration	
|-
|rowspan=4|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
|-
|rowspan=4|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：<br>

$ make myimx6ek200_6q_config<br>
[[File: myimx6l3035_build_3.3.0.2.jpg]]<br>


== '''Compilation'''==
* Execute compilation <br>
$ make<br>
''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.<br>
[[File: myimx6l3035_build_3.5.0.1.jpg]]<br>

* Complete compilation <br>
''Tips：u-boot compilation process will take a few minustes or so.<br>
[[File: myimx6l3035_build_3.5.0.2.jpg]]<br>


== '''Target file'''==
You can get the compiled file u-boot.bin with ls command after compilation.<br>
$ ls<br>
[[File: myimx6l3035_build_3.6.0.1.jpg]]<br>


= '''Compile kernel'''=
----
== '''Enter kernel source directory'''==
$ cd ~/my-imx6/02_source/imx_3.0.35_4.1.0/linux-3.0.35/<br>
[[File: myimx6l3035_build_4.1.0.1.jpg]]<br>


== '''Validate configured file'''==
* Execute source command<br>
$ source ~/my-imx6/03_tools/myimx6_3035_build_env<br>
[[File: myimx6l3035_build_4.2.0.1.jpg]]<br>

* View compiler configuration<br>
$ echo $ARCH<br>
$ echo $CROSS_COMPILE<br>

''Tips：you can see that ARCH和CROSS_COMPILE is configured<br>
[[File: myimx6l3035_build_4.2.0.2.jpg]]<br>

* Verify cross compiler tool configuration<br>
$ ${CROSS_COMPILE}gcc –v<br>

''Tips：you can see version information of cross compiler tool shown on terminal after execution of command.as below：<br>
[[File: myimx6l3035_build_4.2.0.3.jpg]]<br>


== '''Prepare for kernel configuration'''==
* Remove kernel configuration<br>
$ make distclean<br>
[[File: myimx6l3035_build_4.3.0.1.jpg]]<br>

* Generated.config file<br>

Instructions：configuration files used for MY-IMX6-EK200 seires of evaluation board and MY-IMX6-EK314 series of evaluation board is myimx6_defconfig.<br>
$ make myimx6_defconfig<br>
[[File: myimx6l3035_build_4.3.0.2.jpg]]<br>


== '''Compile kernel'''==
* Compile uImage<br>
$ make uImage<br>

Instruction：4 threads compilation is used in the screenshots.<br>
[[File: myimx6l3035_build_4.4.0.1.jpg]]<br>

* Complete compilation<br>
[[File: myimx6l3035_build_4.4.0.2.jpg]]<br>

*Target file <br>
arch/arm/boot/uImage is the target file through compilation，you can view the file information with ls command.<br>
$ ls arch/arm/boot/uImage –la<br>
[[File: myimx6l3035_build_4.4.0.3.jpg]]<br>


== '''Compile module'''==
* Compile <br>

$ make<br>
Instruction：4 threads compilation is used in the screenshots.<br>
[[File: myimx6l3035_build_4.5.0.1.jpg]]<br>

* Complete compilation<br>
[[File: myimx6l3035_build_4.5.0.2.jpg]]<br>

* Target file<br>
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><br>
$ find -name *.ko<br>
[[File: myimx6l3035_build_4.5.0.3.jpg]]<br>


= '''Linux application compilation'''=
----
== '''Write application'''==
1) Create application directory<br>
$ mkdir ~/my-imx6/02_source/application/ -p <br>
$ cd ~/my-imx6/02_source/application/ <br>
[[File: myimx6l3035_build_5.1.0.1.jpg]]<br>

2) Write application（here take hello.c as example）<br>
Create hello.c and write following code and save：<br>
#include <stdio.h> <br>
int main(int argc, char **argv) <br>
{ <br>
　　　printf("Hello, MYZR!\n"); <br>
　　　<br>
　　　return; <br>
} <br>

3)View code<br>
$ cat hello.c <br>
[[File: myimx6l3035_build_5.1.0.2.jpg]]<br>


== '''Validate compiler configured file'''==
* Execute source command<br>
$ source ~/my-imx6/03_tools/myimx6_3035_build_env<br>
[[File: myimx6l3035_build_5.2.0.1.jpg]]<br>

* View compiler configuration<br>
$ echo $ARCH<br>
$ echo $CROSS_COMPILE<br>
''Tips：you can see that ARCH和CROSS_COMPILE is configured <br>
[[File: myimx6l3035_build_5.2.0.2.jpg]]<br>

* Verify cross compiler tool configuration<br>
$ ${CROSS_COMPILE}gcc –v<br>

''Tips：you can see version information of cross compiler tool shown on terminal after execution of command.as below：<br>
[[File: myimx6l3035_build_5.2.0.3.jpg]]<br>

== '''Compile application'''==
2) Compile <br>
$ ${CROSS_COMPILE}gcc hello.c -o hello.out <br>

Note：the above commands contain charater“$”，e.g“${CROSS_COMPILE}gcc”，which is the environment variable generated when referring to our source.<br>
[[File: myimx6l3035_build_5.3.0.1.jpg]]<br>

3) View type of target file <br>
$ file hello.out <br>

You can get the property of target file hello.out.<br>
[[File: myimx6l3035_build_5.3.0.2.jpg]]<br>


= '''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》.<br>


== '''Decompress file system to compiler host'''==
1）Create directory of file system and enter.<br>
$ mkdir ~/my-imx6/04_rootfs/ -p<br>
$ cd ~/my-imx6/04_rootfs/<br>
[[File: myimx6l3035_build_6.2.0.1.jpg]]<br>

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

3）Decompress file system to specified directory<br>
$ mkdir rootfs<br>
$ sudo tar jxf rootfs-linux.tar.bz2 -C rootfs<br>
[[File: myimx6l3035_build_6.2.0.2.jpg]]<br>

== '''Add application to file system'''==
$ cp ~/my-imx6/02_source/application/hello.out rootfs/app_test/<br>
[[File: myimx6l3035_build_6.3.0.1.jpg]]<br>

5）Re-pakcage file system<br>
$ rm -rf rootfs-linux.tar.bz2<br>
$ cd rootfs/<br>
$ sudo tar cjf ../rootfs-linux.tar.bz2 *<br>
[[File: myimx6l3035_build_6.3.0.2.jpg]]<br>

== '''Add module to file system'''==
Prepare .ko file of module needed,as to other operations please refer to“add application to file system”.<br>
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