wxgtk was moved from gtk2 to gtk3 and gtk2 support was dropped but some ports still require wxgtk3 to be build with gtk2 support. Audacity is completely broken and unstable with wxgtk31 built with gtk3 support. According to wxgtk's website, the default is gtk2 not gtk3.
Note that by default, GTK+ 2.x is used. GTK+ 3 can be specified with –with-gtk=3.
And the instructions to build audacity requires gtk2 support and gtk3 support renders the ui broken.
The wxWidgets library is required. Audacity 2.3.3 requires wxGTK 3.1.x, preferably 3.1.1. If you compile wxWidgets yourself it should be built with the default gtk2 option, not with gtk3.
Please add back gtk2 support.
Isn't GTK2 EOLed?
(In reply to Yuri Victorovich from comment #1)
No, gtk2 is still very much still needed
Some applications still require GTK 2, an older stable version of GTK.