CEXE_sources += FiniteDifferenceSolver.cpp CEXE_sources += EvolveB.cpp CEXE_sources += EvolveE.cpp CEXE_sources += EvolveF.cpp CEXE_sources += ComputeDivE.cpp VPATH_LOCATIONS += $(WARPX_HOME)/Source/FieldSolver/FiniteDifferenceSolver