pax-utils is a small set of utilities for peforming Q/A (mostly security)
checks on systems (most notably, `scanelf`). It is focused on the ELF
format, but does include a Mach-O helper too for OS X systems.
While heavily integrated into Gentoo's build system, it can be used on any
distro as it is a generic toolset.
Originally focused only on [PaX](https://pax.grsecurity.net/), it has been
expanded to be generally security focused. It still has a good number of
PaX helpers for people interested in that.