Fixes to get Dart VM compiling on Ubuntu 13.04, Debian Wheezy.

runtime/vm/object.h

Index: runtime/vm/object.h
diff --git a/runtime/vm/object.h b/runtime/vm/object.h
index 812607de9731ad3ee0478a4db3203d8be5778c98..c10afbeedbc49d9fbc6b1a7cf6e92ade03105f9a 100644
--- a/runtime/vm/object.h
+++ b/runtime/vm/object.h
@@ -5989,8 +5989,8 @@ intptr_t Instance::GetNativeField(Isolate* isolate, int index) const {
     return 0;
   }
   intptr_t byte_offset = index * sizeof(intptr_t);
-  return *reinterpret_cast<intptr_t*>(native_fields->ptr()->data_ +
-                                      byte_offset);
+  return *reinterpret_cast<intptr_t*>(
+      reinterpret_cast<intptr_t>(native_fields->ptr()->data_) + byte_offset);

[siva, 2013/08/06 22:53:43]

Please add a comment here as to why the multiple reinterpret_cast is required.

[Chris Bracken, 2013/08/07 06:12:57]

Rewrote with a simpler approach for indexing into RawTypedData's variable-length
data_ that avoids the nested casts and the strict-aliasing warning that came
from dereferencing data_ (uint8_t* cast to intptr_t*)

 }