warnings in xcode project

[Scott Wheeler]

With the current Xcode, and building with the Xcode project generated from "cmake .. -G Xcode -DCMAKE_BUILD_TYPE=Debug", the only one of these warnings that I see is the "semantic" issue, which is something we can't change for binary compatibility reasons.  Even after going into the Xcode project and explicitly enabling almost every warning, I don't see these.  How did you generate the project file where you see these?

-Scott

> On Oct 13, 2016, at 11:28 AM, Simon Gaus <phisto05 at gmail.com> wrote:
> 
> Hi everyone,
> 
> i’m using Xcode (8.0) to build taglib (1.11) as a framework, and everything works just fine.
> You can find the project at https://github.com/Phisto/Taglib.
> 
> But there is a flood (90 in total) of warnings emitted by Xcode:
> 
> 1. a lot of "value conversion" issues
> 
> 2 one "semantic issue" 
> 
> 3. some "dead store“ warnings
> 
> 4. some „logic error“ warnings
> 
> None of them seem to cause any problems, but i don’t feel comfortable building projects with warnings.
> 
> 1. Most of the "value conversion“ warnings complain about not casting unsigned long to unsigned int.
> Is it safe to cast the values to silence these warnings ? Do i need to release this code changes ?
> I’m happy to do that, but currently the github project just contains the project files and not the taglib source.
>   
> 2. The "semantic issue“ - well - i really don’t know what to do about that or if its some how a problem.
> 
> „Deleted called on ‚Taglib::FileRef::FileTypeResolver‘ that s abstract but has non virtual destructor.“ list.tcc line 80.
> 
> 3. I could silence these warnings with  #pragma unused(var).
> Same questions as with 1.
> 
> 4. The „logic error“ warnings complain about dereferencing null pointer and using null pointer arguments in memory comparison functions. I "just" use taglib and i really don’t have any experience with C++ so again i’m not able to check if there is something about these warnings. 
> Here is a screenshot of one the „logic errors“: http://simonsapps.de/null_pointer_warning.png
> 
> Thank you for any help you can provide.
> 
> Best regards,
> Simon Gaus