chore: clean up makefile, remove unused targets

Makefile

@@ -52,6 +52,9 @@ SBY = sby -fd '$(SYMBIYOSYS_WORKDIR)' --yosys='$(YOSYS) -m $(GHDL_YOSYS_PLUGIN)'
 # END OF CONFIGURATION
 # ====================
 
+.PHONY: default
+default: bitstream
+
 SIM_WAVE = $(SIM_DIR)/$(SIM_ENTITY).ghw
 # for only capturing select signals
 SIM_WAVEOPTS = $(SIM_DIR)/$(SIM_ENTITY).waveopt
@@ -69,14 +72,8 @@ else
 $(error Bad PNR toolchain: expected one of symbiflow, nextpnr)
 endif
 
-# =======
-# PHONIES
-# =======
-
-.PHONY: all simonly wave
-
-# default target
-all: bitstream
+$(GHDL_WORKDIR) $(SYNTH_WORKDIR):
+	mkdir -p $@
 
 $(GHDL_WORKDIR)/work-obj$(VHDL_STD).cf: | $(GHDL_WORKDIR)
 	$(GHDL) import $(GHDL_FLAGS) $(VHDL_FILES)
@@ -84,42 +81,42 @@ $(GHDL_WORKDIR)/work-obj$(VHDL_STD).cf: | $(GHDL_WORKDIR)
 $(LITEX_WORKDIR)/gateware/liteeth_core.v: gen_liteeth.py
 	./gen_liteeth.py --output-dir $(LITEX_WORKDIR)
 
+# =======
+# PHONIES
+# =======
+
+.PHONY: simonly
 simonly: $(VHDL_FILES) | $(GHDL_WORKDIR)/work-obj$(VHDL_STD).cf
 	$(GHDL) make $(GHDL_FLAGS) $(SIM_ENTITY)
 	$(GHDL) run $(GHDL_FLAGS) $(SIM_ENTITY) $(SIM_RUN_FLAGS)
 
+.PHONY: wave
 wave: $(VHDL_FILES)
 	$(GHDL) make $(GHDL_FLAGS) $(SIM_ENTITY)
 	$(GHDL) run $(GHDL_FLAGS) $(SIM_ENTITY) $(SIM_RUN_FLAGS) --wave=$(SIM_WAVE)
 	$(GTKWAVE) $(SIM_WAVE) $(SIM_WAVE_SAVE)
 
-.PHONY: check check-formal
+.PHONY: check
 check: check-formal
 
+.PHONY: check-formal
 check-formal:
 	$(foreach f,$(SBY_FILES),$(SBY) $(f))
 
-.PHONY: synth show bitstream flash
+.PHONY: synth
 synth: $(SYNTH_OUTPUT_FILE)
 
+.PHONY: show
 show: $(SYNTH_OUTPUT_FILE)
 	$(YOSYS) -p show $<
 
+.PHONY: bitstream
 bitstream: $(SYNTH_WORKDIR)/$(YOSYS_MODULE_NAME).bit
 
+.PHONY: flash
 flash: $(SYNTH_WORKDIR)/$(YOSYS_MODULE_NAME).bit
 	$(OPENFPGALOADER) -b arty $<
 
 .PHONY: clean
 clean:
 	rm -rf $(WORKDIR)
-
-$(GHDL_WORKDIR) $(SYNTH_WORKDIR):
-	mkdir -p $@
-
-.PHONY: echo-ghdl-flags echo-sim-run-flags
-echo-ghdl-flags:
-	@echo $(GHDL_FLAGS)
-
-echo-sim-run-flags:
-	@echo $(SIM_RUN_FLAGS)