The libX11-devel package contains libraries and header files for libX11.
acquired package info from repodata DB: repodata/69e709f4d2852d98f12867a74015d19384fe2727ff670fd70178cdde80b1e77e-primary.sqlite.bz2
Libyami-devel package contains libraries and header files used for developing applications using libyami.
Yami is the core building block of a media solution. It uses hardware acceleration to parses and decode video streams.
The libva-devel package contains libraries and header files for developing applications that use libva.