unix,stmhal,esp8266: When find'ing frozen files follow symbolic links.

It's useful to be able to use symbolic links to add files and directories
to the set of scripts to be frozen.

esp8266/Makefile

@@ -139,7 +139,7 @@ DRIVERS_SRC_C = $(addprefix drivers/,\
 SRC_S = \
 	gchelper.s \
 
-FROZEN_MPY_PY_FILES := $(shell find $(FROZEN_MPY_DIR) -type f -name '*.py')
+FROZEN_MPY_PY_FILES := $(shell find -L $(FROZEN_MPY_DIR) -type f -name '*.py')
 FROZEN_MPY_MPY_FILES := $(addprefix $(BUILD)/,$(FROZEN_MPY_PY_FILES:.py=.mpy))
 
 OBJ =

stmhal/Makefile

@@ -284,7 +284,7 @@ endif
 ifneq ($(FROZEN_MPY_DIR),)
 # To use frozen bytecode, put your .py files in a subdirectory (eg frozen/) and
 # then invoke make with FROZEN_MPY_DIR=frozen (be sure to build from scratch).
-FROZEN_MPY_PY_FILES := $(shell find $(FROZEN_MPY_DIR) -type f -name '*.py')
+FROZEN_MPY_PY_FILES := $(shell find -L $(FROZEN_MPY_DIR) -type f -name '*.py')
 FROZEN_MPY_MPY_FILES := $(addprefix $(BUILD)/,$(FROZEN_MPY_PY_FILES:.py=.mpy))
 CFLAGS += -DMICROPY_QSTR_EXTRA_POOL=mp_qstr_frozen_const_pool
 CFLAGS += -DMICROPY_MODULE_FROZEN_MPY

unix/Makefile

@@ -182,7 +182,7 @@ ifneq ($(FROZEN_MPY_DIR),)
 # then invoke make with FROZEN_MPY_DIR=frozen (be sure to build from scratch).
 MPY_CROSS = ../mpy-cross/mpy-cross
 MPY_TOOL = ../tools/mpy-tool.py
-FROZEN_MPY_PY_FILES := $(shell find $(FROZEN_MPY_DIR) -type f -name '*.py')
+FROZEN_MPY_PY_FILES := $(shell find -L $(FROZEN_MPY_DIR) -type f -name '*.py')
 FROZEN_MPY_MPY_FILES := $(addprefix $(BUILD)/,$(FROZEN_MPY_PY_FILES:.py=.mpy))
 CFLAGS += -DMICROPY_QSTR_EXTRA_POOL=mp_qstr_frozen_const_pool
 CFLAGS += -DMICROPY_MODULE_FROZEN_MPY