遇到No CMAKE_CXX_COMPILER could be found.问题

遇到的问题

No CMAKE_CXX_COMPILER could be found.

Tell CMake where to find the compiler by setting either the environment
variable "CXX" or the CMake cache entry CMAKE_CXX_COMPILER to the full path
to the compiler, or to the compiler name if it is in the PATH.

分析

1.查看g++有没有安装？（我的是g++没安装）

which g++

2.没有就安装g++

sudo apt install g++ -y

（一般都是g++和cmake,gcc一起安装）

sudo apt install gcc g++ cmake -y

3.要是g++安装有问题，就是apt的源有问题。

我的就是apt的源有问题，导致g++安装失败。

 

4.更换apt源：

我的环境是ARM的Ubuntu 18.04 

4.1 备份源

sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak

4.2 编辑

sudo vim /etc/apt/sources.list

4.3写入内容为：

# 中科大源 - ubuntu18.04 - arm构架 【Nvidia Jetson】
deb https://mirrors.ustc.edu.cn/ubuntu-ports/ bionic main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-updates main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-backports main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-security main restricted universe multiverse
deb https://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-proposed main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-ports/ bionic main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-updates main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-backports main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-security main restricted universe multiverse
deb-src https://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-proposed main restricted universe multiverse

 

4.4更换apt源参考：

https://www.cnblogs.com/liqi175/p/16565517.html

 

5.再次安装g++

sudo apt install gcc g++ cmake -y

成功！

我的可以编译了！！

 

 

 

 

参考资料：

g++的问题：https://blog.csdn.net/weixin_44120025/article/details/118769262

ARM源：https://zhuanlan.zhihu.com/p/618725243