Re: libobjc2: Dealing with non-constant initializers in sarray2.h included from C files

[David Chisnall]

On 6 Sep 2016, at 15:35, Ivan Vučica <address@hidden> wrote:
> 
> Cheers,
> 
> I'm fiddling with writing Bazel (http://www.bazel.io/) BUILD-files for 
> libobjc2 (and, hopefully, other GS libraries). There are reasons why I'm 
> doing this, but they're a separate discussion topic.
> 
> There's this:
> 
> In file included from dtable.h:3:0,
>                  from category_loader.c:5:
> sarray2.h: At top level:
> sarray2.h:26:1: error: initializer element is not constant
>  static const uint32_t data_mask = data_size - 1;
>  ^
> sarray2.h:55:8: error: variably modified 'data' at file scope
>   void *data[data_size];
>         ^
> 
> 
> This is on GCC 4.8.4. I guess I can pass -x c++, but that feels wrong. Any 
> suggestions?

Report a bug with GCC?  data_size is a const int, and so data_size - 1 is an 
integer constant expression according to the C standard, and is a valid 
initialiser.

David