[branch gsoc-2022-chariri-2, commit 6a264517f2]
Compilation of 'freetype2-demos' using
```
meson setup meson-build
meson compile -C meson-build
```
fails with
```
../src/ftinspect/widgets/tripletselector.cpp: In member function ‘void
TripletSelector::repopulateFonts()’:
../src/ftinspect/widgets/tripletselector.cpp:46:16: error: ‘class QFileInfo’
has no member named ‘isSymbolicLink’; did you mean ‘isSymLink’?
if (info.isSymbolicLink())
^~~~~~~~~~~~~~
isSymLink
../src/ftinspect/widgets/tripletselector.cpp: In member function ‘void
TripletSelector::createLayout()’:
../src/ftinspect/widgets/tripletselector.cpp:324:18: error: ‘class QComboBox’
has no member named ‘setPlaceholderText’
fontComboBox_->setPlaceholderText(tr("No font open"));
^~~~~~~~~~~~~~~~~~
../src/ftinspect/widgets/tripletselector.cpp:325:18: error: ‘class QComboBox’
has no member named ‘setPlaceholderText’
faceComboBox_->setPlaceholderText(tr("No face available"));
^~~~~~~~~~~~~~~~~~
../src/ftinspect/widgets/tripletselector.cpp:326:16: error: ‘class QComboBox’
has no member named ‘setPlaceholderText’
niComboBox_->setPlaceholderText(tr("No named instance available"));
^~~~~~~~~~~~~~~~~~
```
Werner
