Add STM32F4/CC3100 example & Co

PUBLISHED_FROM=7f805d89dcb795c9b3ee637ef1dbdcfcf3323469

examples/STM32F4_CC3100/startup_utils.c

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2014-2016 Cesanta Software Limited
+ * All rights reserved
+ */
+
+#include <stdlib.h>
+
+/*
+ * STM's startup script requires __libc_init_array for successfull
+ * initialization.
+ * Oficially supported IDE (Keil, IAR...) provide this function.
+ * We use our own
+ */
+
+extern void (*__preinit_array_start[])(void) __attribute__((weak));
+extern void (*__preinit_array_end[])(void) __attribute__((weak));
+extern void (*__init_array_start[])(void) __attribute__((weak));
+extern void (*__init_array_end[])(void) __attribute__((weak));
+
+void __libc_init_array(void) {
+  size_t count;
+  size_t i;
+
+  count = __preinit_array_end - __preinit_array_start;
+  for (i = 0; i < count; i++) __preinit_array_start[i]();
+
+  count = __init_array_end - __init_array_start;
+  for (i = 0; i < count; i++) __init_array_start[i]();
+}