New build script, and now building mininet from source (#69)

* moved basic exercise to new run script

* forgot some files

* CLI output now goes to logs

* typo, and forgot topo file

* fixed net.stop() bug

* added temporary change to makefile

* typos hard

P4D2_2017_Fall/utils/Makefile

@@ -0,0 +1,32 @@
+BUILD_DIR = build
+PCAP_DIR = pcaps
+LOG_DIR = logs
+
+TOPO = topology.json
+P4C = p4c-bm2-ss
+RUN_SCRIPT = ../../utils/run_exercise.py
+
+source := $(wildcard *.p4)
+outfile := $(source:.p4=.json)
+
+compiled_json := $(BUILD_DIR)/$(outfile)
+
+all: run
+
+run: build 
+	sudo python $(RUN_SCRIPT) -t $(TOPO) -j $(compiled_json)
+
+stop:
+	sudo mn -c
+
+build: dirs $(compiled_json)
+
+$(BUILD_DIR)/%.json: %.p4
+	$(P4C) --p4v 16 -o $@ $<
+
+dirs:
+	mkdir -p $(BUILD_DIR) $(PCAP_DIR) $(LOG_DIR)
+
+clean: stop
+	rm -f *.pcap
+	rm -rf $(BUILD_DIR) $(PCAP_DIR) $(LOG_DIR)