Added flag JUCE_COMPILER_SUPPORTS_LAMBDAS

modules/juce_core/system/juce_PlatformDefs.h

@@ -337,6 +337,10 @@ namespace juce
  #if (__GNUC__ * 100 + __GNUC_MINOR__) >= 407 && ! defined (JUCE_DELETED_FUNCTION)
   #define JUCE_DELETED_FUNCTION = delete
  #endif
+
+ #if (__GNUC__ * 100 + __GNUC_MINOR__) >= 406 && ! defined (JUCE_COMPILER_SUPPORTS_LAMBDAS)
+  #define JUCE_COMPILER_SUPPORTS_LAMBDAS 1
+ #endif
 #endif
 
 #if JUCE_CLANG && defined (__has_feature)
@@ -356,6 +360,10 @@ namespace juce
   #define JUCE_DELETED_FUNCTION = delete
  #endif
 
+ #if __has_feature (cxx_lambdas)
+  #define JUCE_COMPILER_SUPPORTS_LAMBDAS 1
+ #endif
+
  #ifndef JUCE_COMPILER_SUPPORTS_OVERRIDE_AND_FINAL
   #define JUCE_COMPILER_SUPPORTS_OVERRIDE_AND_FINAL 1
  #endif
@@ -372,6 +380,7 @@ namespace juce
 
 #if defined (_MSC_VER) && _MSC_VER >= 1700
  #define JUCE_COMPILER_SUPPORTS_OVERRIDE_AND_FINAL 1
+ #define JUCE_COMPILER_SUPPORTS_LAMBDAS 1
 #endif
 
 #ifndef JUCE_DELETED_FUNCTION

modules/juce_events/messages/juce_MessageManager.cpp

@@ -131,6 +131,7 @@ void MessageManager::stopDispatchLoop()
 #endif
 
 //==============================================================================
+#if JUCE_COMPILER_SUPPORTS_LAMBDAS
 struct AsyncFunction  : private MessageManager::MessageBase
 {
     AsyncFunction (std::function<void(void)> f)  : fn (f)  { post(); }
@@ -146,7 +147,9 @@ void MessageManager::callAsync (std::function<void(void)> f)
 {
     new AsyncFunction (f);
 }
+#endif
 
+//==============================================================================
 class AsyncFunctionCallback   : public MessageManager::MessageBase
 {
 public:

modules/juce_events/messages/juce_MessageManager.h

@@ -91,10 +91,12 @@ public:
    #endif
 
     //==============================================================================
+   #if JUCE_COMPILER_SUPPORTS_LAMBDAS
     /** Asynchronously invokes a function or C++11 lambda on the message thread.
         Internally this uses the CallbackMessage class to invoke the callback.
     */
     static void callAsync (std::function<void(void)>);
+   #endif
 
     /** Calls a function using the message-thread.