the cmake port is very very far behind. cmake-devel has been updated to the newest version currently available (3.29.0) for most systems, and then newest supportable (3.28.4) for 10.7 and < 10.6.
Please try out if you care to, as cmake-devel should become cmake soon. If you are interested in the issues regarding v3.29.0 on 10.7 (kernel panic) or < 10.6, there are details here: https://trac.macports.org/ticket/67540 <https://trac.macports.org/ticket/67540> If you are a keener with debugging on 10.7, and can sort out a proper fix for 3.29.0 on 10.7, upstream will love you. Most likely eventually we/they will use the commits they added to the 3.28.N branch to fix it for those systems, although those commits are more involved that we usually like to carry. K
