Version 0.1.2 of package Auto-Header has just been released in GNU ELPA. You can now find it in M-x list-packages RET.
Auto-Header describes itself as: ====================================== Automatically find the right C headers ====================================== More at https://elpa.gnu.org/packages/auto-header.html ## Summary: This script parses man-pages to guess what C header files a function might need. ## Recent NEWS: [Not provided 🙁]