Zephyr開發環境搭建-1-安裝必需的軟件

前言

由於我只在ubuntu下開發zephyr，所以所有的實踐都是針對ubuntu系統的(ubuntu18.04)

Update Your Operating System

sudo apt-get update && sudo apt-get upgrade    //Ensure your host system is up to date before proceeding.

Install Requirements and Dependencies

sudo apt-get install --no-install-recommends git cmake ninja-build gperf \
  ccache dfu-util device-tree-compiler wget \
  python3-pip python3-setuptools python3-wheel xz-utils file make gcc \
  gcc-multilib

關鍵（針對CMake)：由於Zephyr requires a recent version of CMake, 我在上面的install中沒有加上cmake, 而從從CMake官網下載最新版(有二進制或者源碼安裝，都可以，比較方便的是用二進制安裝方式安裝)來安裝, 因爲通過sudo apt-get install安裝的CMake版本可能會比較低，而官方要求CMake version 3.13.1 or higher is required. 

官方給出的如何在系統中存在舊版本的CMake下讓Zephyr使用新版本CMake的解決辦法如下（但是，最好還是刪除舊版的CMake，然後安裝最新版）：

CMake version 3.13.1 or higher is required. Check what version you have by using cmake --version. If you have an older version, there are several ways of obtaining a more recent one:

• Use pip: (方法1）

  pip3 install --user cmake
  

• Download and install from the pre-built binaries provided by the CMake project itself in the CMake Downloads page. For example, to install version 3.13.1 in ~/bin/cmake: （方法2）

  mkdir $HOME/bin/cmake && cd $HOME/bin/cmake
  wget https://github.com/Kitware/CMake/releases/download/v3.13.1/cmake-3.13.1-Linux-x86_64.sh
  yes | sh cmake-3.13.1-Linux-x86_64.sh | cat
  echo "export PATH=$PWD/cmake-3.13.1-Linux-x86_64/bin:\$PATH" >> $HOME/.zephyrrc