I get these warnings in ncurses:
,----
| W: libncurses6: lacks-unversioned-link-to-shared-library example: usr/lib/x86_64-linux-gnu/libncurses.so [lib/x86_64-linux-gnu/libncurses.so.6.3]
| W: libncursesw6: lacks-unversioned-link-to-shared-library example: usr/lib/x86_64-linux-gnu/libncursesw.so [lib/x86_64-linux-gnu/libncursesw.so.6.3]
`----
These files usr/lib/x86_64-linux-gnu/libncurses{,w}.so actually exist in
libncurses-dev, but they are linker scripts rather than symlinks.