ABI changes in libaspell

[bbhtt]

Hello,

We recently changed the way how we build the GCC compiler for i686 ie. we added 
the following build options to GCC `--with-cpu=pentium4, --with-tune=generic
--with-fpmath=sse`.

That change seems to have caused an ABI change in `libaspell.so.15`, as shown
below. The ABI diff report is generated using libabigail [1].


```
┌────────────────────────────┐
│ ABI Break: libaspell.so.15 │
└────────────────────────────┘
Functions changes summary: 2 Removed, 0 Changed, 0 Added functions
Variables changes summary: 0 Removed, 0 Changed, 0 Added variable
2 Removed functions:
  [D] 'function acommon::PosibErr<acommon::Decode*> 
acommon::get_cache_data<acommon::Decode>(acommon::GlobalCache<acommon::Decode>*, 
acommon::ConvBase::CacheConfig*, const acommon::ConvBase::CacheKey&)' 
{_ZN7acommon14get_cache_dataINS_6DecodeEEENS_8PosibErrIPT_EEPNS_11GlobalCacheIS3_EEPNS3_11CacheConfigERKNS3_8CacheKeyE}
  [D] 'function acommon::PosibErr<acommon::Encode*> 
acommon::get_cache_data<acommon::Encode>(acommon::GlobalCache<acommon::Encode>*, 
acommon::ConvBase::CacheConfig*, const acommon::ConvBase::CacheKey&)' 
{_ZN7acommon14get_cache_dataINS_6EncodeEEENS_8PosibErrIPT_EEPNS_11GlobalCacheIS3_EEPNS3_11CacheConfigERKNS3_8CacheKeyE}
```

It be great to know if this `get_cache_data` actually public API supposed to be 
consumed by downstream libraries depending on libaspell or something internally 
used by libaspell only.

As far as I can tell the change is coming from `cache.hpp` [2], but the answer 
to the previous question is not very apparent to me.

(Please CC me as I'm not on the list)

Thanks!

[1]: https://sourceware.org/libabigail/
[2]: 
https://github.com/GNUAspell/aspell/blob/ee6cbb12ff36a1e6618d7388a78dd4e0a2b44041/common/cache.hpp#L14-L23

- bbhtt

https://bbhtt.github.io/