Difference between lib64x11 and lib64xorg-x11

I’m trying to install a third party software that requires X11 development files to build.

Which one should I install in OM LX 4.0, lib64x11-devel or lib64xorg-x11-devel? What are the differences between them?

Thanks

Well,

I’ve tried lib64x11-devel with no luck.
lib64xorg-X11_-devel worked fine.

lib64xorg-x11_-devel (the naming error with that underscore should really be fixed – will do) is a metapackage that pulls in the -devel files for all xorg libraries.
lib64x11-devel is just the headers for the libX11 library (and one of the packages being pulled in by lib64xorg-x11_-devel).

Thanks.