disruptive libffi upgrade

[Andrew Haley]

On 04/13/2012 01:59 AM, Anthony Green wrote:
> 
>   I recently release libffi 3.0.11, and ABI changes are mandating a .so
>   number change.  Despite the ABI change, I suspect that simple rebuilds
>   are all that will be required for dependent packages.
>  
>   The ABI changes are simply:
> 
> 1. Some internal debugging functions that should never have been
> exported have been removed:
> 
>          void ffi_stop_here(void)
>          void ffi_assert(char *expr, char *file, int line)
>          void ffi_type_test(ffi_type *a, char *file, int line)
> 
> 2. A new function has been introduced to support
>    variadic functions (ffi_prep_cif_var).
> 
>   Libtool's guidelines for .so versioning mandate that I move from
>   libffi.so.5.0.11 to libffi.so.6.0.0 (because functions have been
>   removed).
> 
>   There are more than a handful of packages that depend on libffi, so
>   I'm looking for advice on when to make this change.  Also, is there a
>   convenient way to determine which packages in all of Fedora depend on
>   libffi?  I would like to notify the maintainers that rebuilds will be
>   required.  Or is there some other way to do this?

I don't think we need this for F17.  F18 will do.

Andrew.