Installing cmake from source on a Raspberry Pi

This procedure will take about an hour.

Install:

If another version if cmake is installed, uninstall it. A compiler such as g++ must be installed.
```
sudo apt remove cmake
```
Prerequisite
```
sudo apt install libssl-dev
```
Download the latest archive from https://cmake.org/download/ to a directory such as your home directory.
Extract cmake-3.19.2.tar.gz. This procedure assumes your home directory. For other versions change the version in the commands.
```
cd ~/
tar -zxvf cmake-3.19.2.tar.gz
cd cmake-3.19.2
./bootstrap
make -j 4
sudo make install
sudo ldconfig
```
reboot