From 2e516074daee76fb3e0710a893a0f40532bb3252 Mon Sep 17 00:00:00 2001
From: Ayke van Laethem
Date: Thu, 14 Jun 2018 15:57:29 +0200
Subject: py: Implement a module system for external, user C modules.

This system makes it a lot easier to include external libraries as static,
native modules in MicroPython.  Simply pass USER_C_MODULES (like
FROZEN_MPY_DIR) as a make parameter.
---
 py/py.mk | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

(limited to 'py/py.mk')

diff --git a/py/py.mk b/py/py.mk
index 85e9072d7..ad7d12204 100644
--- a/py/py.mk
+++ b/py/py.mk
@@ -129,6 +129,13 @@ $(BUILD)/$(BTREE_DIR)/%.o: CFLAGS += -Wno-old-style-definition -Wno-sign-compare
 $(BUILD)/extmod/modbtree.o: CFLAGS += $(BTREE_DEFS)
 endif
 
+# External modules written in C.
+ifneq ($(USER_C_MODULES),)
+CFLAGS_MOD += -DMICROPY_CMODULES_INCLUDE_H='"genhdr/cmodules.h"'
+include $(USER_C_MODULES)/*/micropython.mk
+SRC_QSTR += $(BUILD)/genhdr/cmodules.h
+endif
+
 # py object files
 PY_CORE_O_BASENAME = $(addprefix py/,\
 	mpstate.o \
@@ -300,7 +307,7 @@ endif
 
 # Sources that may contain qstrings
 SRC_QSTR_IGNORE = py/nlr%
-SRC_QSTR = $(SRC_MOD) $(filter-out $(SRC_QSTR_IGNORE),$(PY_CORE_O_BASENAME:.o=.c)) $(PY_EXTMOD_O_BASENAME:.o=.c)
+SRC_QSTR += $(SRC_MOD) $(filter-out $(SRC_QSTR_IGNORE),$(PY_CORE_O_BASENAME:.o=.c)) $(PY_EXTMOD_O_BASENAME:.o=.c)
 
 # Anything that depends on FORCE will be considered out-of-date
 FORCE:
-- 
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