Re: Compilation error, due to changes in pango

[Masamichi Hosoda]

> The question is now what exactly causes this:
> 
>   error: invalid conversion from 'gpointer' {aka 'void*'}
>          to 'FT_Face' {aka 'FT_FaceRec_*'}
> 
> during the lilypond compilation?  Is this really caused by pango?  Or
> is this a glib issue?  Could you investigate?

Pango 1.44 seems to have changed
the return type of pango_fc_font_lock_face () from FT_Face to gpointer.

https://gitlab.gnome.org/GNOME/pango/commit/fe3294ccf5a0b37c8a0950cc994ee0dfdd1dd909#594159b337483b122645586e446206f28d553b6e_56_52

LilyPond's lily/pango-font.cc has

```
FT_Face face = pango_fc_font_lock_face (fcfont);
```

If you use Pango 1.44,
the return type of pango_fc_font_lock_face () is different
from the variable type of face.

Here's a quick hack but I have not tried.

```
FT_Face face = static_cast<FT_Face>(pango_fc_font_lock_face (fcfont));
```