On the difference between using CMake and make to build QE.

Here describes the method of using CMAKE to compile QE, which gives the following instruction:

Compiling a subset of QE is also supported, for example make pw ph cp. 
Accepted targets are all_currents, couple, cp, epw, gwl, hp, ld1, neb, 
ph, pp, pw, pwall, pwcond, tddfpt, upf, xspectra.

But if I use make to build QE, the available targets given by hitting after make are shown below:

$ make 
acfdt          default        gui            libfft         libutil        pw             tddfpt
all            depend         gwl            libfox         links          pw4gwwlib      travis
all_currents   dftd3          gwwlib         libks_solvers  lrmods         pwall          veryclean
bindir         distclean      hp             libla          mods           pwcond         w90
clean          doc            hplibs         liblapack      neb            pwlibs         want
couple         doc_clean      install        libmbd         ph             tar            xspectra
cp             epw            ld1            librxc         phlibs         tar-gui        yambo
d3q            gipaw          libcuda        libupf         pp             tar-qe-modes   

As you can see, the CMake targets are only a subset of the ones supported by make. Could you please give me some explanation about this behavior/design?

Regards, HZ