add explicit get-deps target to fetch submodule dependency

- fix app linker warnings for imxrt port
- fix GIT_SUBMODULE_VERSIONS missing lib in some cases

.github/workflows/build_arm.yml

@@ -76,6 +76,7 @@ jobs:
     - name: Build
       run: |
         arm-none-eabi-gcc --version
+        make -C $ENV_PORT BOARD=${{ matrix.board }} get-deps
         make -C $ENV_PORT BOARD=${{ matrix.board }} all self-update copy-artifact
         for app in ${{ env.ENV_PORT }}/apps/*/; do if [ $app != 'apps/self_update/' ]; then make -C $app BOARD=${{ matrix.board }} all; fi done
 

README.md

@@ -49,14 +49,18 @@ To build this for a specific board, we need to change current directory to its p
 $ cd ports/stm32f4
 ```
 
-Then compile with `make BOARD=[board_name] all`, for example
+Firstly we need to get all of submodule dependecy for our board e.g mcu driver with `get-deps` target. You only need to do this once for each mcu family
+
+```
+make BOARD=feather_stm32f405_express get-deps
+```
+
+Then compile with `all` target:
 
 ```
 make BOARD=feather_stm32f405_express all
 ```
 
-The required mcu driver submodule if any will be clone automatically if needed. 
-
 ### Flash
 
 `flash` target will use the default on-board debugger (jlink/cmsisdap/stlink/dfu) to flash the binary, please install those support software in advance. Some board use bootloader/DFU via serial which is required to pass to make command

ports/make.mk

@@ -40,13 +40,6 @@ ifeq ($(wildcard $(TOP)/$(BOARD_DIR)/),)
   $(error Invalid BOARD specified)
 endif
 
-
-# Fetch submodules depended by family
-fetch_submodule_if_empty = $(if $(wildcard $(TOP)/lib/$1/*),,$(info $(shell git -C $(TOP)/lib submodule update --init $1)))
-ifdef GIT_SUBMODULES
-  $(foreach s,$(GIT_SUBMODULES),$(call fetch_submodule_if_empty,$(s)))
-endif
-
 # Build directory
 BUILD = _build/$(BOARD)
 BIN = $(TOP)/$(PORT_DIR)/_bin/$(BOARD)
@@ -56,7 +49,7 @@ OUTNAME ?= tinyuf2-$(BOARD)
 
 # UF2 version with git tag and submodules
 GIT_VERSION := $(shell git describe --dirty --always --tags)
-GIT_SUBMODULE_VERSIONS := $(shell git submodule status $(addprefix ../../lib/,$(GIT_SUBMODULES)) | cut -d" " -f3,4 | paste -s -d" " -)
+GIT_SUBMODULE_VERSIONS := $(shell git submodule status $(addprefix ../../lib/,$(GIT_SUBMODULES)) | cut -b 43- | paste -s -d" " -)
 GIT_SUBMODULE_VERSIONS := $(subst ../../lib/,,$(GIT_SUBMODULE_VERSIONS))
 
 CFLAGS += \

ports/mimxrt10xx/apps/memory.ld

@@ -18,4 +18,5 @@ MEMORY
   m_interrupts          (RX)  : ORIGIN = _interrupts_origin , LENGTH = _interrupts_length
   m_text                (RX)  : ORIGIN = _text_origin       , LENGTH = _text_length
   m_data                (RW)  : ORIGIN = 0x20000000         , LENGTH = 32K
+  m_data2               (RW)  : ORIGIN = _ocram_base        , LENGTH = _ocram_size
 }

ports/rules.mk

@@ -65,6 +65,14 @@ clean:
 	$(RM) -rf $(BUILD)
 	$(RM) -rf $(BIN)
 
+# get depenecies
+.PHONY: get-deps
+get-deps:
+  ifdef GIT_SUBMODULES
+	git -C $(TOP) submodule update --init $(addprefix lib/,$(GIT_SUBMODULES))
+  endif
+
+
 #-------------- Artifacts --------------
 SELF_UF2 ?= apps/self_update/$(BUILD)/update-$(OUTNAME).uf2