How to integrate Facebook's mobile ad functionality in our app that supports iOS 4.3+?

I'm trying to get this set up for my company: https://developers.facebook.com/docs/tutorials/mobile-app-ads/

I used the instructions here to get it into our app: https://developers.facebook.com/docs/getting-started/facebook-sdk-for-ios/3.1/

From my initial attempt to integrate and get data, it seems like this can only work for iOS 6. When I run the app for iOS 6 simulator it runs fine, but for an actual device running iOS 5, it fails during linking:
ld: framework not found Social

Is it true that this FB SDK functionality can only work in iOS 6+ apps? If so, does anyone know how to integrate with FB mobile ads reporting for apps that support iOS 4.3 to iOS 6+.

Thanks!

Solution

The new SDK actually requires 6.

Not sure what was causing the error, but to eliminate the build problem, I just cleaned the build folder, deleted the derived data from the project, and removed & re-added the facebook libs.

Then to prevent this from blowing up on pre-iOS 6 situations I added this to my app:


+ (BOOL)isSocialFrameworkAvailable
{
    static BOOL available = NO;
    static dispatch_once_t onceToken;
    dispatch_once(&onceToken, ^{
        available = NSClassFromString(@"SLComposeViewController") != nil;        
    });
    return available;
}


- (BOOL)application: (UIApplication *) application didFinishLaunchingWithOptions: (NSDictionary *) launchOptions
{
    // [...]    

    if ([[self class] isSocialFrameworkAvailable]) {        
        [FBSettings setLoggingBehavior:[NSSet setWithObjects:
                                        FBLoggingBehaviorFBRequests,
                                        FBLoggingBehaviorFBURLConnections,
                                        FBLoggingBehaviorAccessTokens,
                                        FBLoggingBehaviorPerformanceCharacteristics,
                                        FBLoggingBehaviorSessionStateTransitions, 
                                        nil]];
        NSDate *facebookIdPublishedDate = [[NSUserDefaults standardUserDefaults] objectForKey:@"facebookIdPublishedDate"];
        if (!facebookIdPublishedDate) {
            [[NSUserDefaults standardUserDefaults] setObject:[NSDate date] forKey:@"facebookIdPublishedDate"];        
            [FBSettings publishInstall:@"XXXXXXXXXXXXXXXX"];
        }
    }    


    // [...]
}