configure fixes for LAM MPI.

configure.in

@@ -1460,6 +1460,7 @@ if test "$tabling" = "yes"
 fi
 dnl LAM/MPI interface
 
+LAMOBJS=""
 MPI_OBJS=
 LAM_MPI_CC=${MPI_CC}
 if  test "$yap_cv_lam" != "no" ; then	
@@ -1489,8 +1490,10 @@ elif test "$yap_cv_mpi" != "no"; then
     OLD_CC=${CC}
     CC=${MPI_CC}
     AC_CHECK_LIB(mpi,MPI_Init,
-		[AC_DEFINE(HAVE_LIBMPI, 1)],
-		[AC_DEFINE(HAVE_LIBMPI, 0)])
+		[LAMOBJS=yap_mpi."$SO"
+                 AC_DEFINE(HAVE_LIBMPI, 1)],
+		[LAMOBJS=yap_mpi."$SO"
+                 AC_DEFINE(HAVE_LIBMPI, 0)])
     if test "$ac_cv_lib_mpi_MPI_Init" = yes
     then
 	#YAPMPILIB=YapMPI.a

library/lammpi/Makefile.in

@@ -63,7 +63,7 @@ hash.o: $(srcdir)/hash.c $(srcdir)/hash.h
 @DO_SECOND_LD@	@SHLIB_LD@  -o yap_mpi.@SO@ $(OBJS)  $(MPILDF) @EXTRA_LIBS_FOR_DLLS@
 
 install: all
-	@if test "$(SOBJS)" = "no"; then echo ""; else $(INSTALL_PROGRAM) $(SOBJS) $(DESTDIR)$(YAPLIBDIR); fi
+	@if test "$(SOBJS)" = ""; then echo ""; else $(INSTALL_PROGRAM) $(SOBJS) $(DESTDIR)$(YAPLIBDIR); fi
 
 clean:
 	rm -f *.o *~ $(OBJS) $(SOBJS) *.BAK