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How To Compile Tool Chain For Bootloader

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For compiling Uboot 3.4.4 tool chain is required.
Steps to check and change tool chain correspondingly
1) At the bash prompt of your Linux PC, execute the following command.

$ tar -zxvf arm-tools.tar.gz

Now you will have the "arm-tools" folder created in your current directory.


2) Copy the "arm-tools" directory to your home directory (or wherever you
prefer to)

$ cp -rf arm-tools ~/


3) Modify the .bash_profile file in the home directory, by using the following
steps. (Add the following lines in .bash_profile)

$ vi ~/.bash_profile

This will open the file for editing. Make the following changes in the file

export HOME=$HOME/arm-tools
PATH=$PATH:$HOME/bin:$HOME/arm-tools/arm-linux/bin:$HOME/arm- tools/image_tools/:$HOME/arm-tools/image_tools/bin

export PATH

Close the ".bash_profile" file.


4) Then execute the command

$ source .bash_profile


5) To check whether arm-tools environment has been properly set or not type the
following at the prompt

$ which arm-linux-gcc

The expected output is as follows:

~/arm-tools/arm-linux/bin/arm-linux-gcc

If the tool chain doesn't get set with by doing above step 5 logout and login
again to the system and repeat the step 5.

Related
check out what is bootloader in embedded system.
Internal bootloader.
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