How to compile d_example.cpp in the example directory?

[xiaorong117]

I was trying to compile d_example.cpp in the "example" directory. I modified makefile to use mpicxx and mpif90 sequentially, but i failed.

d_example: $$@.o
mpif90 -o $@ $(OPTL) $@.o $(LIBDMUMPS) $(LORDERINGS) $(LIBS) $(RPATH_OPT) $(LIBBLAS) $(LIBOTHERS)

.SUFFIXES: .c .F .o .cpp
.F.o:
$(FC) $(OPTF) -I. -I$(topdir)/include -I$(topdir)/src $(INCS) -c $.F $(OUTF)$.o
.c.o:
$(CC) $(OPTC) $(CDEFS) -I. -I$(topdir)/include -I$(topdir)/src $(INCS) -c $.c $(OUTC)$.o
.cpp.o:
mpicxx $(OPTC) $(CDEFS) -I. -I$(topdir)/include -I$(topdir)/src $(INCS) -c $.cpp $(OUTC)$.o

[scivision]

I'm not sure, I don't use the Makefiles, they are from the upstream MUMPS project https://mumps-solver.org