Only build shared-node-monitor on Linux.

Isn't needed (and doesn't compile) under BSD.

clientside/protogeni/GNUmakefile.in

@@ -55,11 +55,15 @@ LIBS     += -levent -lcrypto
 LIBS     += -lm -L/usr/local/lib -lpubsub 
 LDFLAGS  += $(LDSTATIC)
 
+ifeq ($(SYSTEM),Linux)
 shared-node-monitor: shared-node-monitor.o $(TESTBED_LIBOBJDIR)/event/libevent.a
 	$(CC) $(LDFLAGS) -o $@ shared-node-monitor.o $(LIBS)
 
 shared-node-monitor.o: shared-node-monitor.c 
 	$(CC) $(CFLAGS) -o $@ $<
+else
+shared-node-monitor:
+endif
 
 boss-install:
 
@@ -72,7 +76,9 @@ client: shared-node-monitor
 client-install: client
 	-mkdir -p $(USRBINDIR)
 	$(INSTALL_PROGRAM) $(SRCDIR)/geni-get $(USRBINDIR)
+ifeq ($(SYSTEM),Linux)
 	$(INSTALL_PROGRAM) shared-node-monitor $(DESTDIR)$CLIENT_BINDIR)/shared-node-monitor
+endif
 
 subboss: