x11-devel: x11-devel (Libraries and other files for X programming) x11-devel: x11-devel: This is a set of include files (found in /usr/X11R6/include), static x11-devel: libraries (found in /usr/X11R6/lib/*.a) and configuration files x11-devel: (found in /usr/X11R6/lib/X11/config/) needed to compile X programs. x11-devel: x11-devel: x11-devel: x11-devel: x11-devel: x11-devel: