diff -ru src.orig//pppd/plugins/Makefile.linux src/pppd/plugins/Makefile.linux
--- src.orig//pppd/plugins/Makefile.linux	2014-02-05 18:12:19.416357768 +0100
+++ src/pppd/plugins/Makefile.linux	2014-02-05 18:13:03.012343460 +0100
@@ -20,7 +20,7 @@
 endif
 
 all:	$(PLUGINS)
-	for d in $(SUBDIRS); do $(MAKE) $(MFLAGS) -C $$d all; done
+	for d in $(SUBDIRS); do $(MAKE) $(MFLAGS) -C $$d all || exit 1; done
 
 %.so: %.c
 	$(CC) -o $@ $(LDFLAGS) $(CFLAGS) $^
@@ -30,12 +30,12 @@
 install: $(PLUGINS)
 	$(INSTALL) -d $(LIBDIR)
 	$(INSTALL) $? $(LIBDIR)
-	for d in $(SUBDIRS); do $(MAKE) $(MFLAGS) -C $$d install; done
+	for d in $(SUBDIRS); do $(MAKE) $(MFLAGS) -C $$d install || exit 1; done
 
 clean:
 	rm -f *.o *.so *.a
-	for d in $(SUBDIRS); do $(MAKE) $(MFLAGS) -C $$d clean; done
+	for d in $(SUBDIRS); do $(MAKE) $(MFLAGS) -C $$d clean || exit 1; done
 
 depend:
 	$(CPP) -M $(CFLAGS) *.c >.depend
-	for d in $(SUBDIRS); do $(MAKE) $(MFLAGS) -C $$d depend; done
+	for d in $(SUBDIRS); do $(MAKE) $(MFLAGS) -C $$d depend || exit 1; done