ubuntu@free5gc:~/free5gc/NFs/upf$ mkdir build
ubuntu@free5gc:~/free5gc/NFs/upf$ cd build
ubuntu@free5gc:~/free5gc/NFs/upf/build$ cmake …
CMake Error: The source directory “/home/ubuntu/free5gc/NFs/upf” does not appear to contain CMakeLists.txt.
Specify --help for usage, or press the help button on the CMake GUI.
can i make this solution " rm -rf upf and git clone --recursive https://github.com/free5gc/upf.git" ?? and after cmake … and make -j$(nproc)