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-rw-r--r--stmhal/Makefile7
1 files changed, 6 insertions, 1 deletions
diff --git a/stmhal/Makefile b/stmhal/Makefile
index d404d9ccb..58a0a7c7a 100644
--- a/stmhal/Makefile
+++ b/stmhal/Makefile
@@ -345,7 +345,12 @@ $(PY_BUILD)/formatfloat.o: COPT += -Os
$(PY_BUILD)/parsenum.o: COPT += -Os
$(PY_BUILD)/mpprint.o: COPT += -Os
-all: $(BUILD)/firmware.dfu $(BUILD)/firmware.hex
+all: $(TOP)/lib/stm32lib/README.md $(BUILD)/firmware.dfu $(BUILD)/firmware.hex
+
+# For convenience, automatically fetch required submodules if they don't exist
+$(TOP)/lib/stm32lib/README.md:
+ $(ECHO) "stm32lib submodule not found, fetching it now..."
+ (cd $(TOP) && git submodule update --init lib/stm32lib)
ifneq ($(FROZEN_DIR),)
# To use frozen source modules, put your .py files in a subdirectory (eg scripts/)