Unsupported protocol while download tar.gz package
What it worked for me is the following:
Update openssl
sudo apt-get install openssl libssl-dev
Modify bootstrap file to enable CMAKE_USE_OPENSSL. Replace this line by:
cmake_options="-DCMAKE_BOOTSTRAP=1 -DCMAKE_USE_OPENSSL=ON"
Run bootstrap script normally in cmake folder
/@path_to_cmake/bootstrap
The problem may be that the CURL library shipped with CMake isn't build with SSL support by default. I had to compile cmake with:
./bootstrap --system-curl
make
sudo make install
... and that worked, because my system's curl has SSL support.