Fix build for platforms without ObjC++.

source/Plugins/Platform/MacOSX/CMakeLists.txt

-add_lldb_library(lldbPluginPlatformMacOSX
+list(APPEND PLUGIN_PLATFORM_MACOSX_SOURCES
   PlatformAppleSimulator.cpp
   PlatformDarwin.cpp
   PlatformDarwinKernel.cpp
   PlatformiOSSimulator.cpp
-  PlatformiOSSimulatorCoreSimulatorSupport.mm
   PlatformMacOSX.cpp
   PlatformRemoteiOS.cpp
   )
+
+if(CMAKE_SYSTEM_NAME MATCHES "Darwin")
+list(APPEND PLUGIN_PLATFORM_MACOSX_SOURCES
+  PlatformiOSSimulatorCoreSimulatorSupport.mm
+  )
+endif()
+
+add_lldb_library(lldbPluginPlatformMacOSX ${PLUGIN_PLATFORM_MACOSX_SOURCES})

source/Plugins/Platform/MacOSX/PlatformiOSSimulatorCoreSimulatorSupport.mm

 //===-- PlatformiOSSimulatorCoreSimulatorSupport.cpp ---------------*- C++ -*-===//
 //
 //                     The LLVM Compiler Infrastructure
 //
 // This file is distributed under the University of Illinois Open Source
 // License. See LICENSE.TXT for details.
 //
 //===----------------------------------------------------------------------===//
 
 #include "PlatformiOSSimulatorCoreSimulatorSupport.h"
 
-#if defined (__APPLE__)  // This Plugin uses the Mac-specific source/Host/macosx/cfcpp utilities
-
 // C Includes
 // C++ Includes
 // Other libraries and framework includes
 #include <CoreFoundation/CoreFoundation.h>
 #include <Foundation/Foundation.h>
 // Project includes
 #include "lldb/Target/FileAction.h"
 #include "lldb/Utility/PseudoTerminal.h"
for (NSUInteger i = 0;
                     d.GetDeviceRuntime().GetVersion() > dev.GetDeviceRuntime().GetVersion())
                     dev = d;
             }
         }
     }
     
     return dev;
 }
-
-#endif // __APPLE__