Macro for conditional code compilation depending on OS versions in iOS

iOS4Check.h

//
//  iOS4Check.h
//  
//  Thank you:
//  http://cocoawithlove.com/2010/07/tips-tricks-for-conditional-ios3-ios32.html
//
//  Created by Vid Tadel on 7/9/10.
//

#import <UIKit/UIKit.h>


#ifndef kCFCoreFoundationVersionNumber_iPhoneOS_2_0
#define kCFCoreFoundationVersionNumber_iPhoneOS_2_0 478.23
#endif

#ifndef kCFCoreFoundationVersionNumber_iPhoneOS_2_1
#define kCFCoreFoundationVersionNumber_iPhoneOS_2_1 478.26
#endif

#ifndef kCFCoreFoundationVersionNumber_iPhoneOS_2_2
#define kCFCoreFoundationVersionNumber_iPhoneOS_2_2 478.29
#endif

#ifndef kCFCoreFoundationVersionNumber_iPhoneOS_3_0
#define kCFCoreFoundationVersionNumber_iPhoneOS_3_0 478.47
#endif

#ifndef kCFCoreFoundationVersionNumber_iPhoneOS_3_1
#define kCFCoreFoundationVersionNumber_iPhoneOS_3_1 478.52
#endif

#ifndef kCFCoreFoundationVersionNumber_iPhoneOS_3_2
#define kCFCoreFoundationVersionNumber_iPhoneOS_3_2 478.61
#endif

#ifndef kCFCoreFoundationVersionNumber_iPhoneOS_4_0
#define kCFCoreFoundationVersionNumber_iPhoneOS_4_0 550.32
#endif

#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 40000
#define IF_IOS4_OR_GREATER(...) \
if (kCFCoreFoundationVersionNumber >= kCFCoreFoundationVersionNumber_iPhoneOS_4_0) \
{ \
__VA_ARGS__ \
}
#else
#define IF_IOS4_OR_GREATER(...)
#endif