Create a shared version of the MUMPS library.

Index: mumps/src/Makefile
===================================================================
--- mumps.orig/src/Makefile	2020-10-01 23:59:29.359262672 +0800
+++ mumps/src/Makefile	2020-10-02 00:36:33.502904903 +0800
@@ -23,8 +23,10 @@
 include $(topdir)/Makefile.inc
 
 mumps_lib:    $(incdir)/mumps_int_def.h \
-              $(libdir)/libmumps_common$(PLAT)$(LIBEXT) \
-              $(libdir)/lib$(ARITH)mumps$(PLAT)$(LIBEXT)
+              $(libdir)/libmumps_common$(PLAT).a \
+              $(libdir)/libmumps_common$(PLAT).so \
+              $(libdir)/lib$(ARITH)mumps$(PLAT).a \
+              $(libdir)/lib$(ARITH)mumps$(PLAT).so
 
 # Build $(incdir)/mumps_int_def.h, needed by mumps_c_types.h
 $(incdir)/mumps_int_def.h: build_mumps_int_def 
@@ -188,14 +190,24 @@
         $(ARITH)tools.o\
         $(ARITH)type3_root.o
 
-$(libdir)/libmumps_common$(PLAT)$(LIBEXT):      $(OBJS_COMMON_MOD) $(OBJS_COMMON_OTHER)
-	$(AR)$@ $?
+$(libdir)/libmumps_common$(PLAT).a:      $(OBJS_COMMON_MOD) $(OBJS_COMMON_OTHER)
+	$(AR) $@ $?
 	$(RANLIB) $@
 
-$(libdir)/lib$(ARITH)mumps$(PLAT)$(LIBEXT):    $(OBJS_MOD) $(OBJS_OTHER)
-	$(AR)$@ $?
+$(libdir)/libmumps_common$(PLAT).so:      $(OBJS_COMMON_MOD) $(OBJS_COMMON_OTHER)
+	$(FC) $(OPTL) -shared $^ -Wl,-soname,libmumps_common$(PLAT)-$(SOVERSION).so -L$(libdir) $(LORDERINGS) -lpthread $(MPIFLIB) $(MPICLIB) -o $(libdir)/libmumps_common$(PLAT)-$(VERSION).so -Wl,-z,defs
+	ln -s libmumps_common$(PLAT)-$(VERSION).so $(libdir)/libmumps_common$(PLAT)-$(SOVERSION).so
+	ln -s libmumps_common$(PLAT)-$(VERSION).so $@
+
+$(libdir)/lib$(ARITH)mumps$(PLAT).a:    $(OBJS_MOD) $(OBJS_OTHER)
+	$(AR) $@ $?
 	$(RANLIB) $@
 
+$(libdir)/lib$(ARITH)mumps$(PLAT).so:    $(OBJS_MOD) $(OBJS_OTHER)
+	$(FC) $(OPTL) -shared $^ -Wl,-soname,lib$(ARITH)mumps$(PLAT)-$(SOVERSION).so -L$(libdir) -lmumps_common$(PLAT) $(LORDERINGS) $(MPIFLIB) -lblas $(SCALAP) $(LAPACK) -o $(libdir)/lib$(ARITH)mumps$(PLAT)-$(VERSION).so -Wl,-z,defs
+	ln -s lib$(ARITH)mumps$(PLAT)-$(VERSION).so $(libdir)/lib$(ARITH)mumps$(PLAT)-$(SOVERSION).so
+	ln -s lib$(ARITH)mumps$(PLAT)-$(VERSION).so $@
+
 # Dependencies between modules:
 # i) arithmetic-dependent modules:
 $(ARITH)ana_aux.o:              $(ARITH)mumps_struc_def.o \
@@ -405,13 +417,13 @@
 
 .SUFFIXES: .c .F .o
 .F.o:
-	$(FC) $(OPTF) -I. -I../include $(INCS) $(IORDERINGSF) $(ORDERINGSF) -c $*.F $(OUTF)$*.o
+	$(FC) $(OPTF) -I. -I../include $(INCS) $(IORDERINGSF) $(ORDERINGSF) -fPIC -c $*.F $(OUTF)$*.o
 .c.o:
-	$(CC) $(OPTC) -I../include $(INCS) $(CDEFS) $(IORDERINGSC) $(ORDERINGSC) -c $*.c $(OUTC)$*.o
+	$(CC) $(OPTC) -I../include $(INCS) $(CDEFS) $(IORDERINGSC) $(ORDERINGSC) -fPIC -c $*.c $(OUTC)$*.o
 
 $(ARITH)mumps_c.o:	mumps_c.c
 	$(CC) $(OPTC) -I../include $(INCS) $(CDEFS) -DMUMPS_ARITH=MUMPS_ARITH_$(ARITH) \
-	      $(IORDERINGSC) $(ORDERINGSC) -c mumps_c.c $(OUTC)$@
+	      $(IORDERINGSC) $(ORDERINGSC) -fPIC -c mumps_c.c $(OUTC)$@
 
 clean:
 	$(RM) *.o *.mod $(incdir)/mumps_int_def.h