【ubuntu 下cmake更新：CMake 3.13 or higher is required. You are running version 3.10.2】

CMake 3.13 or higher is required. You are running version 3.10.2

在交叉编译的时候提示CMake版本太低，需要升级CMake
在官网上面下载3.13
https://cmake.org/files/
之后解压
tar -zxvf cmake-3.13.5.tar.gz
进入解压后的目录：
cd cmake-3.13.5
之后执行：
./bootstrap --prefix=/usr/local
make
sudo make install
很遗憾我这里出错了。
the error is :
CMake Error: Could not find CMAKE_ROOT !!!
执行如下命令：
export CMAKE_ROOT=/usr/local/share/cmake-3.13
执行cmake --ersion还是出现CMake Error: Could not find CMAKE_ROOT !!!
检查path路径设置：
luke@luke:/usr/local/share$ echo $PATH/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin里面没有。需要添加/usr/local/share/cmake-3.13执行命令：exportPATH=$PATH:/usr/local/share/cmake-3.13
搞定收工！！！