Fixed singletons in the STM32 test app (http://stackoverflow.com/questions/22985570)

libuavcan_drivers/stm32/driver/include/uavcan_stm32/clock.hpp

@@ -59,6 +59,8 @@ class SystemClock : public uavcan::ISystemClock, uavcan::Noncopyable
 {
     SystemClock() { }
 
+    static SystemClock self;
+
     virtual uavcan::MonotonicTime getMonotonic()     const { return clock::getMonotonic(); }
     virtual uavcan::UtcTime getUtc()                 const { return clock::getUtc(); }
     virtual void adjustUtc(uavcan::UtcDuration adjustment) { clock::adjustUtc(adjustment); }

libuavcan_drivers/stm32/driver/src/uc_stm32_clock.cpp

@@ -217,6 +217,8 @@ uavcan::uint32_t getUtcAjdustmentJumpCount()
 
 } // namespace clock
 
+SystemClock SystemClock::self;
+
 SystemClock& SystemClock::instance()
 {
     MutexLocker mlocker(clock::mutex);
@@ -224,8 +226,7 @@ SystemClock& SystemClock::instance()
     {
         clock::init();
     }
-    static SystemClock inst;
-    return inst;
+    return self;
 }
 
 } // namespace uavcan_stm32

libuavcan_drivers/stm32/test_stm32f107/src/main.cpp

@@ -16,10 +16,15 @@ uavcan_stm32::CanInitHelper<> can;
 
 typedef uavcan::Node<4096> Node;
 
+uavcan::LazyConstructor<Node> node_;
+
 Node& getNode()
 {
-    static Node node(can.driver, uavcan_stm32::SystemClock::instance());
-    return node;
+    if (!node_.isConstructed())
+    {
+        node_.construct<uavcan::ICanDriver&, uavcan::ISystemClock&>(can.driver, uavcan_stm32::SystemClock::instance());
+    }
+    return *node_;
 }
 
 void ledSet(bool state)