Added workaround in CMakeLists.txt to handle different C++11 compiler…

… flags.

CMakeLists.txt

@@ -29,7 +29,18 @@ if(OPT_PROFILE)
 endif()
 
 add_definitions(-Wall)
-add_definitions(-std=c++0x)
+
+# http://stackoverflow.com/questions/10851247/how-to-activate-c-11-in-cmake
+include(CheckCXXCompilerFlag)
+CHECK_CXX_COMPILER_FLAG("-std=c++11" COMPILER_SUPPORTS_CXX11)
+CHECK_CXX_COMPILER_FLAG("-std=c++0x" COMPILER_SUPPORTS_CXX0X)
+if(COMPILER_SUPPORTS_CXX11)
+    add_definitions(-std=c++11)
+elseif(COMPILER_SUPPORTS_CXX0X)
+    add_definitions(-std=c++0x)
+else()
+    message(STATUS "The compiler ${CMAKE_CXX_COMPILER} has no C++11 support. Please use a different C++ compiler.")
+endif()
 
 if(OPT_LINK_BOOST_STATICALLY)
     set(Boost_USE_STATIC_LIBS ON)