wsl ubuntu18.04 默认的cmake为3.10，编译CMakeLists.txt经常需要高版本cmake。

升级过程如下：

下载cmake-3.15.3-Linux-x86_64.tar.gz

wget https://cmake.org/files/v3.15/cmake-3.15.3-Linux-x86_64.tar.gz

解压文件
tar zxvf cmake-3.15.3-Linux-x86_64.tar.gz

查看解压文件
tree -L 2 cmake-3.15.3-Linux-x86_64

tree -L 2 cmake-3.15.3-Linux-x86_64
cmake-3.15.3-Linux-x86_64
├── bin
│   ├── ccmake
│   ├── cmake
│   ├── cmake-gui
│   ├── cpack
│   └── ctest
├── doc
│   └── cmake
├── man
│   ├── man1
│   └── man7
└── share├── aclocal├── applications├── cmake-3.15├── icons└── mime

创建软链接
sudo mv cmake-3.15.3-Linux-x86_64 /opt/cmake-3.15.3
sudo ln -sf /opt/cmake-3.15.3/bin/* /usr/bin/

查看cmake版本
 

cmake --version
cmake version 3.15.3CMake suite maintained and supported by Kitware (kitware.com/cmake).