upate options for gcc

CMakeLists.txt

@@ -16,14 +16,21 @@ set( CMAKE_EXPORT_COMPILE_COMMANDS 1 ) # Emit a compile flags file to support co
 if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang" OR "${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
   # using Clang (linux or apple) or GCC
   message("Using clang/gcc compiler flags")
-  SET(BASE_CXX_FLAGS "-std=c++11 -Wall -Wextra -Werror -g3 -ferror-limit=5 -fcolor-diagnostics")
+  SET(BASE_CXX_FLAGS "-std=c++11 -Wall -Wextra -Werror -g3")
   SET(DISABLED_WARNINGS " -Wno-unused-parameter -Wno-unused-variable -Wno-unused-private-field -Wno-unused-function -Wno-deprecated-declarations")
   SET(TRACE_INCLUDES " -H -Wno-error=unused-command-line-argument")
+
+  # clang-specific things
+  if ("${CMAKE_CXX_COMPILER_ID}" MATCHES "Clang")
+    SET(BASE_CXX_FLAGS "${BASE_CXX_FLAGS} -ferror-limit=5 -fcolor-diagnostics")
+  endif()
+
+
   SET(CMAKE_CXX_FLAGS "${BASE_CXX_FLAGS} ${DISABLED_WARNINGS}")
   #SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${TRACE_INCLUDES}") # uncomment if you need to track down where something is getting included from
   SET(CMAKE_CXX_FLAGS_DEBUG          "-g3")
   SET(CMAKE_CXX_FLAGS_MINSIZEREL     "-Os -DNDEBUG")
-  SET(CMAKE_CXX_FLAGS_RELEASE        "-O3 -DNDEBUG")
+  SET(CMAKE_CXX_FLAGS_RELEASE        "-march=native -O3 -DNDEBUG")
   SET(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O2 -g")
 elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "MSVC")
   # using Visual Studio C++