SOExtendedAttributes / NSURL+SOExtendedAttributes.h

Diff from to

NSURL+SOExtendedAttributes.h

-
 /*
  NSURL+SOExtendedAttributes
  
  License at the bottom of the file.
  */
 
+#import <Foundation/Foundation.h>
+#import <Availability.h>
+
+#if TARGET_OS_IPHONE
+#ifndef __IPHONE_5_0
+#warning "This project uses features only available in iOS SDK 5.0 and later."
+#endif
+#elif TARGET_OS_MAC
+#ifndef __MAC_10_7
+#warning "This project uses features only available in Mac OS X SDK 10.7 and later."
+#endif
+#endif
+
 /**
  The SOExtendedAttributes category on NSURL enables retrieving and manipulating the extended attributes on a file system item.
  
     SOExtendedAttributesGetValueError,
 };
 
-#import <Foundation/Foundation.h>
 
 @interface NSURL (SOExtendedAttributes)
 
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