Try __func__ -> __FUNCTION__

runtime/vm/dart_api_impl.cc

Index: runtime/vm/dart_api_impl.cc
===================================================================
--- runtime/vm/dart_api_impl.cc	(revision 1418)
+++ runtime/vm/dart_api_impl.cc	(working copy)
@@ -34,12 +34,12 @@
       (vm_handle) ^= tmp.raw();                                               \
     } else if (tmp.IsNull()) {                                                \
       return Api::Error("%s expects argument '%s' to be non-null.",           \
-                        __func__, #dart_handle);                              \
+                        __FUNCTION__, #dart_handle);                          \

[cshapiro, 2011/11/11 01:39:02]

Perhaps we should 

  #define __func__ __FUNCTION__

in the c99 support header?

     } else if (tmp.IsApiFailure()) {                                          \
       return dart_handle;                                                     \
     } else {                                                                  \
       return Api::Error("%s expects argument '%s' to be of type %s.",         \
-                        __func__, #dart_handle, #Type);                       \
+                        __FUNCTION__, #dart_handle, #Type);                   \
     }                                                                         \
   } while (0)
 
@@ -417,7 +417,7 @@
   const Library& library = Library::Handle(Library::LookupLibrary(url_str));
   if (library.IsNull()) {
     return Api::Error("%s: library '%s' not found.",
-                      __func__, url_str.ToCString());
+                      __FUNCTION__, url_str.ToCString());
   } else {
     return Api::NewLocalHandle(library);
   }