If you're packaging RPMs, what you need is approximately to change a few %configure macros to the corresponding %meson macros. Though X.org is large enough that there will probably be some weirdness.

If your software is distributed as a source tarball, the build system follows established conventions like honouring $DESTDIR and doesn't do anything weird like download extra stuff from the internet, creating packages is super easy, at least with RPM.

Most of the time you just write out a bit of metadata, list your dependencies, use standard macros for your build system to do the actual building and then list the files that you want to use from the build (potentially putting them in subpackages), and that's it. RPM even supports specifying dependencies like pkgconfig(library) or perl(Thing) so that the actual package name that provides it does not matter.

I haven't done Debian packaging in ages so I don't know how it compares.