CMake Error at CMakeLists.txt:14 (project): The CMAKE_CXX_COMPILER:

• 报错

CMake Error at CMakeLists.txt:14 (project):The CMAKE_CXX_COMPILER:arm-none-eabi-g++

•  解决办法1

Arm GNU Toolchain Downloads – Arm Developer

x86_64 linux上：

x86_64 Linux hosted cross toolchains
AArch32 bare-metal target (arm-none-eabi)arm-gnu-toolchain-13.2.rel1-x86_64-arm-none-eabi.tar.xz

解压后，再配置一下PATH。 

• 解决办法2

sudo apt install -y gcc-arm-none-eabi