S3C2440 cross-compilation environment construction

Find the cross-compilation tool package arm-linux-gcc-4.4.3.tar.gz in the tool directory of Wei Dongshan's "Linux Development and User Manual" CD. The installation steps are as follows:

1. Unzip the cross-compilation development toolkit

       sudo tar xvzf arm-linux-gcc-4.4.3.tar.gz -C /

      Unzip the toolchain to the root directory. You can specify any directory you want. The system will add the directory /opt/FriendlyARM/toolchain/4.4.3/

2. Modify the environment variables and add the path of the cross compiler to PATH

      Use the method of modifying the /etc/bash.bashrc file (there are other methods)

      ①Open the file with vim:

        #sudo vim /etc/bash.bashrc

      ②Create a new line at the end and add:

        export PATH=$PATH:/opt/FriendlyARM/toolschain/4.4.3/bin

3. Make the new environment variables take effect immediately without restarting the computer:

     #source /etc/bash.bashrc

{

  This is another way to modify the environment variables above

   ① $sudo -i Enter your own password to enter super user privileges

    ② cd /root/

       vim .bashrc

    ③ Add export PATH=$PATH:/opt/FriendlyARM/toolschain/4.4.3/bin (path) at the end (note that there should be no space around the equal sign)

    ④ source ~/.bashrc (takes effect immediately) (it seems to be only for this terminal, log out and the environment variable will always exist)

}

4. Check whether the path is added to PATH

    #echo $PATH

    If the displayed content contains the directory where the cross-compiler just added is located, it proves that the compilation environment has been installed successfully.

5. Test whether the installation is successful

Instruction: #arm-linux-gcc -v

The above command will display the arm-linux-gcc information and version, and the displayed content information is:

At this point, the installation is successful.

6. Compilation experiment

Write a HelloWorld program to test cross-tool connection

Write the following HelloWorld program and save it as hello.c

#include

int main()

{

    printf("HelloWorld!n");

    return0;

}

Execute the following command:

   #arm-linux-gcc-o hello hello.c

If there is no error, it means the installation is successful.