cmake matlab_add_mex(LINK_TO) examples

stevengj/nlopt src/octave/CMakeLists.txt :6 

matlab_add_mex (NAME nlopt_optimize-mex SRC nlopt_optimize-mex.c OUTPUT_NAME nlopt_optimize LINK_TO ${nlopt_lib})

pghysels/STRUMPACK src/matlab/CMakeLists.txt :1 

matlab_add_mex(
  NAME strumpack_solve
  SRC strumpack_matlab_sparse.cpp
  LINK_TO strumpack
)