diff --git a/OgreMain/src/OgrePlatformInformation.cpp b/OgreMain/src/OgrePlatformInformation.cpp
--- a/OgreMain/src/OgrePlatformInformation.cpp
+++ b/OgreMain/src/OgrePlatformInformation.cpp
@@ -40,29 +40,18 @@ THE SOFTWARE.
 #elif (OGRE_COMPILER == OGRE_COMPILER_GNUC || OGRE_COMPILER == OGRE_COMPILER_CLANG) && OGRE_PLATFORM != OGRE_PLATFORM_NACL
 #include <signal.h>
 #include <setjmp.h>
-#if OGRE_PLATFORM != OGRE_PLATFORM_WIN32
-    #if OGRE_PLATFORM == OGRE_PLATFORM_ANDROID
-        #include <linux/sysctl.h>
-    #endif
 #endif
 
-    #if OGRE_PLATFORM == OGRE_PLATFORM_ANDROID
-        #include <cpu-features.h>
-    #elif OGRE_CPU == OGRE_CPU_ARM 
-        #if __MACH__
-            #include <mach/machine.h>
-            #ifndef CPU_SUBTYPE_ARM64_V8
-                #define CPU_SUBTYPE_ARM64_V8 ((cpu_subtype_t) 1)
-            #endif
-            #ifndef CPU_SUBTYPE_ARM_V8
-                #define CPU_SUBTYPE_ARM_V8 ((cpu_subtype_t) 13)
-            #endif
-        #endif
-    #endif
+#if OGRE_PLATFORM == OGRE_PLATFORM_ANDROID
+    #include <linux/sysctl.h>
+    #include <cpu-features.h>
+#endif
+#if OGRE_PLATFORM == OGRE_PLATFORM_APPLE || OGRE_PLATFORM == OGRE_PLATFORM_APPLE_IOS
+    #include <sys/sysctl.h>
+    #include <mach/machine.h>
 #endif
-
 #if OGRE_PLATFORM == OGRE_PLATFORM_WIN32 || OGRE_PLATFORM == OGRE_PLATFORM_WINRT
-    #include "windows.h"
+    #include <windows.h>
 #endif
 
 // Yes, I know, this file looks very ugly, but there aren't other ways to do it better.
diff --git a/OgreMain/CMakeLists.txt b/OgreMain/CMakeLists.txt
--- a/OgreMain/CMakeLists.txt
+++ b/OgreMain/CMakeLists.txt
@@ -419,11 +419,13 @@ else()
   set_target_properties(OgreMain PROPERTIES VERSION ${OGRE_SOVERSION} SOVERSION ${OGRE_SOVERSION})
 endif()
 
-if(OGRE_GCC_VERSION VERSION_EQUAL 4.8 OR OGRE_GCC_VERSION VERSION_GREATER 4.8)
-  if(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
-    list(APPEND LIBRARIES "-latomic_ops")
-  else()
-    list(APPEND LIBRARIES "-latomic")
+if (NOT CMAKE_CXX_COMPILER_ID MATCHES "Clang")
+  if(OGRE_GCC_VERSION VERSION_EQUAL 4.8 OR OGRE_GCC_VERSION VERSION_GREATER 4.8)
+    if(CMAKE_SYSTEM_NAME STREQUAL "FreeBSD")
+      list(APPEND LIBRARIES "-latomic_ops")
+    else()
+      list(APPEND LIBRARIES "-latomic")
+    endif()
   endif()
 endif()