Fixed conen intergation in CMake and added '-march=native' switch

CMakeLists.txt

@@ -24,6 +24,12 @@ set(CMAKE_CXX_STANDARD 14)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 set(CMAKE_CXX_EXTENSIONS OFF)
 	
+include(CheckCXXCompilerFlag)
+CHECK_CXX_COMPILER_FLAG("-march=native" COMPILER_SUPPORTS_MARCH_NATIVE)
+if(COMPILER_SUPPORTS_MARCH_NATIVE)
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -march=native")
+endif()
+
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
     set(warnings "-Wall -Wextra -Werror")
     set(CMAKE_CXX_FLAG_RELEASE "-O3 -DNDEBUG -D_GLIBCXX_USE_CXX11_ABI=0")