cmake-buildsystem

To use the cmake build system instead of the make-driven one, do:

cmake /path/to/lammps/source/cmake

(please note the cmake directory as the very end)

To enable package, e.g. GPU do

cmake /path/to/lammps/source/cmake -DENABLE_GPU=ON

cmake has many many options, do get an overview use the curses-based cmake interface, ccmake:

ccmake /path/to/lammps/source/cmake

(Don't forget to press "g" for generate once you are done with configuring)