perl Makefile.PL CC=mpicc CCFLAGS="-lopenmpi -m64 -L/usr/local/lib/openmpi -L/usr/local/lib/" LIB=/usr/local/lib

...

gcc  -shared -O2 -g -pipe -Wall -Wp,-D_FORTIFY_SOURCE=2 -fexceptions -fstack-protector --param=ssp-b
+uffer-size=4 -m64 -mtune=generic Simple.o  -o blib/arch/auto/Parallel/MPI/Simple/Simple.so     \
             \
...

- libmpi.so defines the symbol openmpi_mpi_char:
...

-  However the file Simple.so does not appear to look for this lib:
...