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authorGeorge Hahn <george.hahn.vhs@gmail.com>2022-05-19 00:33:31 -0600
committerGeorge Hahn <george.hahn.vhs@gmail.com>2022-05-19 00:33:31 -0600
commitc40d75b8765a2972bb6a80a7c6f56865b52063e4 (patch)
treee934f383ad40c3a6c472048fbf48960dc9b3fd62 /rules.mk
parent190dca0a777a8961460faaf993c9e34f921a9a1a (diff)
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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/
Diffstat (limited to 'rules.mk')
-rw-r--r--rules.mk11
1 files changed, 7 insertions, 4 deletions
diff --git a/rules.mk b/rules.mk
index 2f2f3922..8de3fc1e 100644
--- a/rules.mk
+++ b/rules.mk
@@ -7,9 +7,9 @@ SUBMODULES = tinyusb
COBRA = cobra -f
ifndef EMSCRIPTEN
-all: directory $(SUBMODULES) $(BUILD)/$(BIN).elf $(BUILD)/$(BIN).hex $(BUILD)/$(BIN).bin $(BUILD)/$(BIN).uf2 size
+all: $(BUILD)/$(BIN).elf $(BUILD)/$(BIN).hex $(BUILD)/$(BIN).bin $(BUILD)/$(BIN).uf2 size
else
-all: directory $(SUBMODULES) $(BUILD)/$(BIN).html
+all: $(BUILD)/$(BIN).html
endif
$(BUILD)/$(BIN).html: $(OBJS)
@@ -35,13 +35,14 @@ $(BUILD)/$(BIN).uf2: $(BUILD)/$(BIN).bin
@echo UF2CONV $@
@$(UF2) $^ -co $@
+.phony: $(SUBMODULES)
$(SUBMODULES):
git submodule update --init
install:
@$(UF2) -D $(BUILD)/$(BIN).uf2
-%.o:
+$(BUILD)/%.o: | $(SUBMODULES) directory
@echo CC $@
@$(CC) $(CFLAGS) $(filter %/$(subst .o,.c,$(notdir $@)), $(SRCS)) -c -o $@
@@ -59,4 +60,6 @@ clean:
analyze:
@$(COBRA) basic $(INCLUDES) $(DEFINES) $(SRCS)
--include $(wildcard $(BUILD)/*.d)
+DEPFILES := $(SRCS:%.c=$(BUILD)/%.d)
+
+-include $(wildcard $(DEPFILES))