A version of test-api.cc that compiles both on Mac and on Linux.

test/cctest/test-api.cc

Index: test/cctest/test-api.cc
===================================================================
--- test/cctest/test-api.cc	(revision 11273)
+++ test/cctest/test-api.cc	(working copy)
@@ -10865,14 +10865,18 @@
 }
 
 
+static int64_t cast(intptr_t x) { return static_cast<int64_t>(x); }
+
+
 THREADED_TEST(ExternalAllocatedMemory) {
   v8::HandleScope outer;
   v8::Persistent<Context> env(Context::New());
   CHECK(!env.IsEmpty());
   const intptr_t kSize = 1024*1024;
-  CHECK_EQ(v8::V8::AdjustAmountOfExternalAllocatedMemory(kSize), kSize);
-  CHECK_EQ(v8::V8::AdjustAmountOfExternalAllocatedMemory(-kSize),
-           static_cast<intptr_t>(0));
+  CHECK_EQ(cast(v8::V8::AdjustAmountOfExternalAllocatedMemory(kSize)),
+           cast(kSize));
+  CHECK_EQ(cast(v8::V8::AdjustAmountOfExternalAllocatedMemory(-kSize)),
+           cast(0));
 }