Fix compilation under Mac for Ogre 1.9

Ogre-1.9-Mac.diff

diff --git a/CMake/Packages/FindFreetype.cmake b/CMake/Packages/FindFreetype.cmake
--- a/CMake/Packages/FindFreetype.cmake
+++ b/CMake/Packages/FindFreetype.cmake
@@ -59,3 +59,5 @@
 
 # Reset framework finding
 set(CMAKE_FIND_FRAMEWORK "FIRST")
+
+set(FREETYPE_LIBRARIES ${FREETYPE_LIBRARY_REL} ${FREETYPE_LIBRARY_DBG})
diff --git a/CMakeLists.txt b/CMakeLists.txt
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -188,6 +188,10 @@
   endif()
 endif ((CMAKE_COMPILER_IS_GNUCXX OR CMAKE_COMPILER_IS_CLANGXX) AND NOT MINGW)
 
+if (APPLE)
+  set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11 -stdlib=libc++")
+endif ()
+
 # determine system endianess
 if (MSVC)
   # This doesn't work on VS 2010
diff --git a/RenderSystems/GL/src/OSX/OgreOSXWindow.cpp b/RenderSystems/GL/src/OSX/OgreOSXWindow.cpp
--- a/RenderSystems/GL/src/OSX/OgreOSXWindow.cpp
+++ b/RenderSystems/GL/src/OSX/OgreOSXWindow.cpp
@@ -323,7 +323,7 @@
             cgErr = CGLSetParameter(mCGLContextObj, kCGLCPSwapInterval, &swapInterval);
 #else
             GLint swapInterval = 1;
-            cgErr = CGLSetParameter(mCGLContextObj, kCGLCPSwapInterval, &swapInterval);
+            cgErr = static_cast<CGError>(CGLSetParameter(mCGLContextObj, kCGLCPSwapInterval, &swapInterval));
 #endif
             CG_CHECK_ERROR(cgErr)