The libX11-devel package contains libraries and header files for libX11.
acquired package info from repodata DB: repodata/168fa246962e53d9e0ba8cd4bb51a08b3aef361bac92198bf2677e8950495bf6-primary.sqlite.bz2
This package is the development files for libxkbfile.
Libxkbfile is used by the X servers and utilities to parse the XKB configuration data files.