Fixed #334 a makefile bug in lapacke.

lapack-netlib/lapacke/src/Makefile

@@ -2093,7 +2093,9 @@ all: ../../$(LAPACKELIB)
 	$(ARCH) $(ARCHFLAGS) ../../$(LAPACKELIB) $(DOBJ_FILES)
 	$(ARCH) $(ARCHFLAGS) ../../$(LAPACKELIB) $(SOBJ_FILES)
 	$(ARCH) $(ARCHFLAGS) ../../$(LAPACKELIB) $(ZOBJ_FILES)
+ifdef USEXBLAS
 	$(ARCH) $(ARCHFLAGS) ../../$(LAPACKELIB) $(ALLXOBJ)
+endif
 	$(RANLIB) ../../$(LAPACKELIB)
 
 .c.o: