Fix bitwise reproducibility for serial and mpi

src/offline/Makefile

@@ -172,11 +172,16 @@ SUPPRESS_FLAGS := -warn nostderrors -diag-disable 10145
 # default target by convention is ``all''
 all: serial
 
-serial: cable_driver.o common
-	$(FC) $(CFLAGS) $(SUPPRESS_FLAGS) $(LDFLAGS) $(LD) -o $(PROG_SERIAL) $(shell ls *.o) $(CINC)
-
-mpi: cable_mpidrv.o cable_mpicommon.o pop_mpi.o cable_mpiworker.o cable_mpimaster.o common
-	$(FC) $(CFLAGS) $(SUPPRESS_FLAGS) $(LDFLAGS) -o $(PROG_MPI) $(shell ls *.o) $(CINC) $(LD)
+serial: cable_driver.F90 common
+	$(FC) $(SUPPRESS_FLAGS) $(CFLAGS) $(LDFLAGS) $(LD) -o $(PROG_SERIAL) $< $(shell ls *.o) $(CINC)
+
+mpi: FOBJS = $(shell ls *.o)
+mpi: cable_mpidrv.F90 cable_mpicommon.F90 pop_mpi.F90 cable_mpiworker.F90 cable_mpimaster.F90 common
+	$(FC) $(SUPPRESS_FLAGS) $(CFLAGS) $(LDFLAGS) -c cable_mpicommon.F90 $(CINC)
+	$(FC) $(SUPPRESS_FLAGS) $(CFLAGS) $(LDFLAGS) -c pop_mpi.F90 cable_mpicommon.o $(CINC)
+	$(FC) $(SUPPRESS_FLAGS) $(CFLAGS) $(LDFLAGS) -c cable_mpiworker.F90 cable_mpicommon.o pop_mpi.o $(CINC)
+	$(FC) $(SUPPRESS_FLAGS) $(CFLAGS) $(LDFLAGS) -c cable_mpimaster.F90 cable_mpicommon.o cable_mpiworker.o pop_mpi.o $(CINC)
+	$(FC) $(SUPPRESS_FLAGS) $(CFLAGS) $(LDFLAGS) -o $(PROG_MPI) cable_mpidrv.F90 cable_mpicommon.o cable_mpimaster.o cable_mpiworker.o pop_mpi.o $(FOBJS) $(CINC) $(LD)
 
 # dependencies, compilation rules for ALL files needed for "all" (LSRC)
 #================================================================