From e719a8de0ff83bc0bb806e3d33e2c0327549c592 Mon Sep 17 00:00:00 2001
From: Dan McGoo <danmcgoo@users.noreply.github.com>
Date: Tue, 7 Oct 2014 23:12:42 +0900
Subject: [PATCH] Add native arch compilation option.

---
 neo/CMakeLists.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/neo/CMakeLists.txt b/neo/CMakeLists.txt
index e8662216..062a9fa5 100644
--- a/neo/CMakeLists.txt
+++ b/neo/CMakeLists.txt
@@ -18,6 +18,9 @@ option(OPENAL
 option(FFMPEG
 		"Use FMPEG to render Bink videos" ON)
 
+option(ONATIVE
+		"Optimize for the host CPU" OFF)
+
 if(UNIX)
 	set(OPENAL TRUE)
 endif()
@@ -68,6 +71,10 @@ if(CMAKE_COMPILER_IS_GNUCC OR CMAKE_C_COMPILER_ID STREQUAL "Clang")
 		set(my_warn_flags "${my_warn_flags} -Wno-local-type-template-args -Wno-unknown-warning-option -Wno-inline-new-delete")
 	endif()
 	
+	if(NOT CMAKE_CROSSCOMPILING AND ONATIVE)
+		add_definitions(-march=native)
+	endif()
+
 	set(CMAKE_C_FLAGS_DEBUG "${CMAKE_C_FLAGS_DEBUG} -D_DEBUG -O0 -ggdb -fno-strict-aliasing ${my_warn_flags}")
 	#set(CMAKE_C_FLAGS_DEBUGALL "${CMAKE_C_FLAGS_DEBUGALL} -g -ggdb -D_DEBUG -fno-strict-aliasing ${my_warn_flags}")
 	#set(CMAKE_C_FLAGS_PROFILE "${CMAKE_C_FLAGS_PROFILE} -g -ggdb -D_DEBUG -O1 -fno-omit-frame-pointer -fno-strict-aliasing ${my_warn_flags}")