Implement correct OS and CC detection.

src/preparser.cc

 // Copyright 2011 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 24 matching lines @@
 #include "conversions-inl.h"
 #include "globals.h"
 #include "hashmap.h"
 #include "list.h"
 #include "preparse-data-format.h"
 #include "preparse-data.h"
 #include "preparser.h"
 #include "unicode.h"
 #include "utils.h"
 
-#ifdef _MSC_VER
+#if V8_CC_MSVC
 namespace std {
 
 // Usually defined in math.h, but not in MSVC.
 // Abstracted to work
 int isfinite(double value);
 
 }  // namespace std
 #endif
 
 namespace v8 {
@@ skipping 1767 matching lines @@
       backing_store_.Add(static_cast<byte>((ascii_length >> 14) | 0x80u));
     }
     backing_store_.Add(static_cast<byte>((ascii_length >> 7) | 0x80u));
   }
   backing_store_.Add(static_cast<byte>(ascii_length & 0x7f));
 
   backing_store_.AddBlock(bytes);
   return backing_store_.EndSequence().start();
 }
 } }  // v8::preparser