Add -march=native for compilers that support it

Author: musalbas

CMakeLists.txt

@@ -28,6 +28,11 @@ if(NOT CMAKE_BUILD_TYPE)
     set(CMAKE_BUILD_TYPE Release)
 endif()
 
+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 "MSVC")
     check_cxx_compiler_flag("/O2" CXX_FLAG_O2)
     check_cxx_compiler_flag("/Oy" CXX_FLAG_Oy)