Revert new OS and CC detection and related changes since r15923.

src/gdb-jit.cc

 // Copyright 2010 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 "frames-inl.h"
 #include "global-handles.h"
 #include "messages.h"
 #include "natives.h"
 #include "platform.h"
 #include "scopes.h"
 
 namespace v8 {
 namespace internal {
 
-#if V8_OS_DARWIN
+#ifdef __APPLE__
 #define __MACH_O
 class MachO;
 class MachOSection;
 typedef MachO DebugObject;
 typedef MachOSection DebugSection;
 #else
 #define __ELF
 class ELF;
 class ELFSection;
 typedef ELF DebugObject;
@@ skipping 2134 matching lines @@
   ScopedLock lock(mutex.Pointer());
   ASSERT(!IsLineInfoTagged(line_info));
   HashMap::Entry* e = GetEntries()->Lookup(code, HashForCodeObject(code), true);
   ASSERT(e->value == NULL);
   e->value = TagLineInfo(line_info);
 }
 
 
 } }  // namespace v8::internal
 #endif