Add stack.c stub for mpy-cross

mpy-cross/Makefile

@@ -78,6 +78,7 @@ endif
 SRC_C = \
 	main.c \
 	gccollect.c \
+	supervisor/stub/stack.c \
 	supervisor/shared/translate.c
 
 # Add fmode when compiling with mingw gcc

supervisor/stub/stack.c

@@ -0,0 +1,51 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2018 Scott Shawcroft for Adafruit Industries
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+ * THE SOFTWARE.
+ */
+
+#include <stdbool.h>
+#include <stdint.h>
+
+void allocate_stack(void) {
+}
+
+bool stack_ok(void) {
+    return true;
+}
+
+void assert_heap_ok(void) {
+}
+
+void stack_init(void) {
+}
+
+void stack_resize(void) {
+}
+
+void set_next_stack_size(uint32_t size) {
+}
+
+uint32_t get_current_stack_size(void) {
+    return 0;
+}