The libX11-devel package contains libraries and header files for libX11.
acquired package info from repodata DB: repodata/9b2ee55844e864ec17da870960e33c0b4d69092a893cd7daa8a2acffe004cc46-primary.sqlite.bz2
Libxkbfile is used by the X servers and utilities to parse the XKB configuration data files.
This package is the development files for libxkbfile.