sensor-watch/rules.mk
George Hahn c40d75b876 Make submodule and directory rules order-only prerequisites on objects
This instructs make to run the tinyusb and directory rules before
building any objects. Docs: [1].

After this change, `make clean` started running
the tinyusb submodule rule before cleaning. This appears to have been
caused by one of the `build/*.d` files overlapping with the `tinyusb`
name, triggering that rule. I didn't trace this all the way down to a
root cause, but switching the include to something less broad solved the
issue. Roughly guided by [2].

1: https://www.gnu.org/software/make/manual/html_node/Prerequisite-Types.html

2: http://make.mad-scientist.net/papers/advanced-auto-dependency-generation/
2022-05-19 00:33:31 -06:00

66 lines
1.3 KiB
Makefile

CFLAGS += $(INCLUDES) $(DEFINES)
OBJS = $(addprefix $(BUILD)/, $(notdir %/$(subst .c,.o, $(SRCS))))
SUBMODULES = tinyusb
COBRA = cobra -f
ifndef EMSCRIPTEN
all: $(BUILD)/$(BIN).elf $(BUILD)/$(BIN).hex $(BUILD)/$(BIN).bin $(BUILD)/$(BIN).uf2 size
else
all: $(BUILD)/$(BIN).html
endif
$(BUILD)/$(BIN).html: $(OBJS)
@echo HTML $@
@$(CC) $(LDFLAGS) $(OBJS) $(LIBS) -o $@ \
-s ASYNCIFY=1 \
-s EXPORTED_FUNCTIONS=_main \
--shell-file=$(TOP)/watch-library/simulator/shell.html
$(BUILD)/$(BIN).elf: $(OBJS)
@echo LD $@
@$(CC) $(LDFLAGS) $(OBJS) $(LIBS) -o $@
$(BUILD)/$(BIN).hex: $(BUILD)/$(BIN).elf
@echo OBJCOPY $@
@$(OBJCOPY) -O ihex $^ $@
$(BUILD)/$(BIN).bin: $(BUILD)/$(BIN).elf
@echo OBJCOPY $@
@$(OBJCOPY) -O binary $^ $@
$(BUILD)/$(BIN).uf2: $(BUILD)/$(BIN).bin
@echo UF2CONV $@
@$(UF2) $^ -co $@
.phony: $(SUBMODULES)
$(SUBMODULES):
git submodule update --init
install:
@$(UF2) -D $(BUILD)/$(BIN).uf2
$(BUILD)/%.o: | $(SUBMODULES) directory
@echo CC $@
@$(CC) $(CFLAGS) $(filter %/$(subst .o,.c,$(notdir $@)), $(SRCS)) -c -o $@
directory:
@$(MKDIR) -p $(BUILD)
size: $(BUILD)/$(BIN).elf
@echo size:
@$(SIZE) -t $^
clean:
@echo clean
@-rm -rf $(BUILD)
analyze:
@$(COBRA) basic $(INCLUDES) $(DEFINES) $(SRCS)
DEPFILES := $(SRCS:%.c=$(BUILD)/%.d)
-include $(wildcard $(DEPFILES))