How to handle the Xcode warning "no previous prototype for function..."?
Usually with warnings like this you can just define a function prototype at the top of your file, for instance:
BOOL FBIsDeviceIPad();But in C a method with nothing between the braces, i.e. () actually implies there are an arbitrary number of parameters. Instead the definition should become (void) to denote no parameters:
BOOL FBIsDeviceIPad(void);...BOOL FBIsDeviceIPad(void) {#if __IPHONE_OS_VERSION_MAX_ALLOWED >= 30200 if (UI_USER_INTERFACE_IDIOM() == UIUserInterfaceIdiomPad) { return YES; }#endif return NO;}
In Xcode4, go to your project's Build Settings. Search for "prototype". There should be an option called "Missing Function Prototypes"; disable it. You can also do this to the specific target(s) in question.
There are no warnings if such a function is defined as inline.
This may suffice as long as your function is optimized for inline use.http://msdn.microsoft.com/en-us/library/1w2887zk.aspx