toolchain setup

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ESP8266 Linux Toolchain Setup

1. Download toolchain for linux from Espressif website:

   1. for 64-bit Linux
   2. for 32-bit Linux

2. Extract the downloaded file in ~/esp directory:

    mkdir -p ~/esp
    cd ~/esp
    tar -xzf ~/Downloads/xtensa-lx106-elf-gcc8_4_0-esp-2020r3-linux-amd64.tar.gz
   
   

3. To use the toolchain, you will need to update your PATH environment variable in ~/.profile file by adding the following lines to the end of the file:

     export PATH="$PATH:$HOME/esp/xtensa-lx106-elf/bin"
     alias get_lx106='export PATH="$PATH:$HOME/esp/xtensa-lx106-elf/bin"'
   

   Log off and log in back to make the .profile changes effective. Run the following command to verify if PATH is correctly set:

     printenv PATH
   

   You should be looking for a similar result:

     /home/user-name/bin:/home/user-name/.local/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin:/home/user-name/esp/xtense-lx106-elf/bin