message: build: Add the constraint examples to the cmake file
diff: @@ -34,6 +34,7 @@ list(APPEND ALL_EXE_SRCS
  ex25.cpp
  ex26.cpp
  ex27.cpp
  + ex28.cpp
  )
  if (MFEM_USE_MPI)
  @@ -64,6 +65,8 @@ if (MFEM_USE_MPI)
  ex25p.cpp
  ex26p.cpp
  ex27p.cpp
  + ex28p.cpp
  + ex-normal.cpp
  )
  endif()
  