qemu-arm: Add ldscript dependency in the final firmware.elf target.

So that the target is rebuilt if the linker script changes.

ports/qemu-arm/Makefile

@@ -104,10 +104,14 @@ OBJ_COMMON += $(addprefix $(BUILD)/, $(LIB_SRC_C:.c=.o))
 OBJ_RUN =
 OBJ_RUN += $(addprefix $(BUILD)/, $(SRC_RUN_C:.c=.o))
 
+ALL_OBJ_RUN = $(OBJ_COMMON) $(OBJ_RUN)
+
 OBJ_TEST =
 OBJ_TEST += $(addprefix $(BUILD)/, $(SRC_TEST_C:.c=.o))
 OBJ_TEST += $(BUILD)/tinytest.o
 
+ALL_OBJ_TEST = $(OBJ_COMMON) $(OBJ_TEST)
+
 # All object files, needed to get dependencies correct
 OBJ = $(OBJ_COMMON) $(OBJ_RUN) $(OBJ_TEST)
 
@@ -127,8 +131,8 @@ run: $(BUILD)/firmware.elf
 	qemu-system-arm -machine $(BOARD) $(QEMU_EXTRA) -nographic -monitor null -semihosting -kernel $<
 
 ## `$(LD)` doesn't seem to like `--specs` for some reason, but we can just use `$(CC)` here.
-$(BUILD)/firmware.elf: $(OBJ_COMMON) $(OBJ_RUN)
-	$(Q)$(LD) $(LDFLAGS) -o $@ $^ $(LIBS)
+$(BUILD)/firmware.elf: $(LDSCRIPT) $(ALL_OBJ_RUN)
+	$(Q)$(LD) $(LDFLAGS) -o $@ $(ALL_OBJ_RUN) $(LIBS)
 	$(Q)$(SIZE) $@
 
 include $(TOP)/py/mkrules.mk

ports/qemu-arm/Makefile.test

@@ -16,8 +16,8 @@ $(BUILD)/genhdr/tests.h:
 $(BUILD)/tinytest.o:
 	$(Q)$(CC) $(CFLAGS) -DNO_FORKING -o $@ -c $(TINYTEST)/tinytest.c
 
-$(BUILD)/firmware-test.elf: $(OBJ_COMMON) $(OBJ_TEST)
-	$(Q)$(LD) $(LDFLAGS) -o $@ $^ $(LIBS)
+$(BUILD)/firmware-test.elf: $(LDSCRIPT) $(ALL_OBJ_TEST)
+	$(Q)$(LD) $(LDFLAGS) -o $@ $(ALL_OBJ_TEST) $(LIBS)
 	$(Q)$(SIZE) $@
 
 # Note: Using timeout(1) to handle cases where qemu hangs (e.g. this can happen with alignment errors).