> 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));
```
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