use the proper compiler if on Darwin x86_64
use the proper compiler if on Darwin x86_64

koush/androidmono,koush/androidmono,JeroMiya/androidmono,JeroMiya/androidmono,JeroMiya/androidmono,koush/androidmono,koush/androidmono,JeroMiya/androidmono,koush/androidmono,JeroMiya/androidmono