From 4fdf87c0e8a801093d5f0513e4aab122e20bfc2e Mon Sep 17 00:00:00 2001
From: Matthijs Kooijman <matthijs@stdin.nl>
Date: Wed, 25 Jun 2014 15:58:38 +0200
Subject: Allow variants to define an initVariant() function that is called at
 startup.

See #2080 and #2139.
---
 cores/arduino/Arduino.h | 1 +
 cores/arduino/main.cpp  | 7 +++++++
 2 files changed, 8 insertions(+)

diff --git a/cores/arduino/Arduino.h b/cores/arduino/Arduino.h
index 6b923a4..630f0d6 100644
--- a/cores/arduino/Arduino.h
+++ b/cores/arduino/Arduino.h
@@ -118,6 +118,7 @@ typedef uint8_t boolean;
 typedef uint8_t byte;
 
 void init(void);
+void initVariant(void);
 
 void pinMode(uint8_t, uint8_t);
 void digitalWrite(uint8_t, uint8_t);
diff --git a/cores/arduino/main.cpp b/cores/arduino/main.cpp
index 0ad6962..091c365 100644
--- a/cores/arduino/main.cpp
+++ b/cores/arduino/main.cpp
@@ -19,10 +19,17 @@
 
 #include <Arduino.h>
 
+// Weak empty variant initialization function.
+// May be redefined by variant files.
+void initVariant() __attribute__((weak));
+void initVariant() { }
+
 int main(void)
 {
 	init();
 
+	initVariant();
+
 #if defined(USBCON)
 	USBDevice.attach();
 #endif
-- 
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