diff -ruN 17FEBpl1.2.orig/lib/makefile 17FEBpl1.2/lib/makefile
--- 17FEBpl1.2.orig/lib/makefile	2017-04-26 11:44:02.000000000 +0200
+++ 17FEBpl1.2/lib/makefile	2017-09-25 21:08:51.359595847 +0200
@@ -58,7 +58,7 @@
 ## Ubuntu version 13.10 on
 ## 
 ##	$(SH_CMD) -o $(LIBMIDAS_SH) *.o $(DEV_NULL)
-	$(SH_CMD) -o $(LIBMIDAS_SH) *.o -lm $(F2C_LIBS) $(DEV_NULL)
+	$(SH_CMD) -o $(LIBMIDAS_SH) *.o -lm $(F2C_LIBS) $(RPC_LIB) $(DEV_NULL)
 
 # for the AltLinux distro we had to change the line above to:
 #	$(SH_CMD) -o $(LIBMIDAS_SH) *.o -lm $(DEV_NULL)
diff -ruN 17FEBpl1.2.orig/libsrc/os/unix/makefile 17FEBpl1.2/libsrc/os/unix/makefile
--- 17FEBpl1.2.orig/libsrc/os/unix/makefile	2017-04-26 11:44:32.000000000 +0200
+++ 17FEBpl1.2/libsrc/os/unix/makefile	2017-09-25 21:08:48.747583816 +0200
@@ -19,7 +19,7 @@
 
 include ../../../local/default.mk
 
-CFLAGS += $(C_OPT) $(DEBUG) $(MEM_OPT) $(SH_OPT) $(OSSYS) $(SYS) -I$(INC)
+CFLAGS += $(C_OPT) $(DEBUG) $(MEM_OPT) $(SH_OPT) $(OSSYS) $(SYS) -I$(INC) $(RPC_OPT)
 
 LIB = $(LIBDIR)/libos.a
 
@@ -43,7 +43,7 @@
 # testos.exe only for checking the linking process, in cannot be executed...
 
 testos.exe: testos.o $(LIB)
-	$(LDCC) testos.o $(LIB) $(MLIB) $(SLIB) -o $@
+	$(LDCC) testos.o $(LIB) $(MLIB) $(SLIB) $(RPC_LIB) -o $@
 	$(STRIP) $@
 
 $(LIB): $(OBJ)