Also -mtune=native

Author: glebm

Rakefile

@@ -23,7 +23,7 @@ Rake::ExtensionTask.new('libsass', gem_spec) do |ext|
   # Link C++ stdlib statically when building binary gems.
   ext.cross_config_options << '--enable-static-stdlib'
 
-  ext.cross_config_options << '--disable-march-native'
+  ext.cross_config_options << '--disable-march-tune-native'
 
   ext.cross_compiling do |spec|
     spec.files.reject! { |path| File.fnmatch?('ext/*', path) }

ext/extconf.rb

@@ -20,9 +20,9 @@
 end
 
 # Set to false when building binary gems
-if enable_config('march-native', true)
-  $CFLAGS << ' -march=native'
-  $CXXFLAGS << ' -march=native'
+if enable_config('march-tune-native', true)
+  $CFLAGS << ' -march=native -mtune=native'
+  $CXXFLAGS << ' -march=native -mtune=native'
 end
 
 if enable_config('lto', true)