Call init() before static object allocation

Force init to be called *first*, i.e. before static object allocation.
Otherwise, statically allocated objects that need HAL may fail.

Ex: LiquidCrystal use delayMicroseconds() which use HAL_GetTick()
if System Tick not init infinite loop...


Signed-off-by: Frederic.Pillon <[email protected]>

Author: fpistm

cores/arduino/main.cpp

@@ -26,13 +26,17 @@
 void initVariant() __attribute__((weak));
 void initVariant() { }
 
+// Force init to be called *first*, i.e. before static object allocation.
+// Otherwise, statically allocated objects that need HAL may fail.
+ __attribute__(( constructor (101))) void premain() {
+    init();
+}
+
 /*
  * \brief Main entry point of Arduino application
  */
 int main( void )
 {
-	init();
-
 	initVariant();
 
 #if defined(USBCON)