software/demo/Makefile: Make it as much as possible similar to BIOS's Makefile.

litex/soc/software/bios/Makefile

@@ -72,8 +72,7 @@ vpath %.a $(PACKAGES:%=../%)
 		-Wl,--whole-archive \
 		-Wl,--gc-sections \
 		-Wl,-Map,$@.map \
-		$(LIBS:lib%=-l%) \
+		$(LIBS:lib%=-l%)
-
 
 ifneq ($(OS),Windows_NT)
 	chmod -x $@

litex/soc/software/demo/Makefile

@@ -3,40 +3,43 @@ BUILD_DIR?=../build/
 include $(BUILD_DIR)/software/include/generated/variables.mak
 include $(SOC_DIRECTORY)/software/common.mak
 
-OBJECTS   = donut.o helloc.o main.o crt0.o
+OBJECTS   = donut.o helloc.o crt0.o main.o
 ifdef WITH_CXX
 	OBJECTS += hellocpp.o
 endif
 
+
 all: demo.bin
 
+
+%.bin: %.elf
+	$(OBJCOPY) -O binary $< $@
+ifneq ($(OS),Windows_NT)
+	chmod -x $@
+endif
+
+vpath %.a $(PACKAGES:%=../%)
+
+demo.elf: $(OBJECTS)
+	$(CC) $(LDFLAGS) -T linker.ld -N -o $@ \
+		$(OBJECTS) \
+		$(PACKAGES:%=-L$(BUILD_DIR)/software/%) \
+		-Wl,--whole-archive \
+		-Wl,--gc-sections \
+		-Wl,-Map,$@.map \
+		$(LIBS:lib%=-l%)
+
+ifneq ($(OS),Windows_NT)
+	chmod -x $@
+endif
+
 # pull in dependency info for *existing* .o files
 -include $(OBJECTS:.o=.d)
 
-%.bin: %.elf
-	$(OBJCOPY) -O binary $< $@
-	chmod -x $@
-
-demo.elf: $(OBJECTS)
-	$(CC) $(LDFLAGS) \
-		-T linker.ld \
-		-N -o $@ \
-		$(OBJECTS) \
-		$(PACKAGES:%=-L$(BUILD_DIR)/software/%) \
-		$(LIBS:lib%=-l%)
-	chmod -x $@
-
-main.o: main.c
-	$(compile)
-
-crt0.o: $(CPU_DIRECTORY)/crt0.S
-	$(assemble)
-
 donut.o: CFLAGS   += -w
 
-helloc.o: CFLAGS += -w
+VPATH = $(BIOS_DIRECTORY):$(BIOS_DIRECTORY)/cmds:$(CPU_DIRECTORY)
 
-hellocpp.o: CXXFLAGS += -w
 
 %.o: %.cpp
 	$(compilexx)
@@ -48,6 +51,6 @@ hellocpp.o: CXXFLAGS += -w
 	$(assemble)
 
 clean:
-	$(RM) $(OBJECTS) $(OBJECTS:.o=.d) demo.elf demo.bin .*~ *~
+	$(RM) $(OBJECTS) demo.elf demo.bin .*~ *~
 
-.PHONY: all main.o clean load
+.PHONY: all clean