Closed issue by LinArcX on void-packages repository

https://github.com/void-linux/void-packages/issues/17793

Description:
Hello. i want to test a ncurses app that uses [cdk](https://invisible-island.net/cdk) internally:
https://github.com/lnkgyv/cdk_examples

But i can't find __cdk.h__:
```
╰ make           
gcc -o calendar calendar.c -lncurses -lcdk
In file included from calendar.c:1:
calendar.h:4:10: fatal error: cdk.h: No such file or directory
    4 | #include <cdk.h>
      |          ^~~~~~~
compilation terminated.
make: *** [Makefile:11: calendar] Error 1
```
Also i didn't see any cdk package in void repo and i tried to look for this header file via `xlocate`:
`╰ xlocate cdk.h `

But it could not find anything.