checking sys/param.h presence... yes checking for sys/param.h... yes checking whether byte ordering is bigendian... no checking for X... no checking for XRRSizes in -lXrandr... no checking for X11/extensions/Xrandr.h... no *** Direct X11 support needs Xrandr libraries and headers. *** Couldn't find needed headers. Continuing without X11 backend. checking for glPushMatrix in -lGL... no configure: error: No OpenGL library could be found.