I downloaded and built sbase for my OSX system to test the cal program, and noticed (and fixed locally) several issues.
Before posting any patches, I wanted to ask - philosophically speaking, how much effort should sbase put towards supporting systems that don't support the latest-and-greatest POSIX functions? Three functions were missing (utimensat, clock_gettime, and fmemopen), and fmemopen in particular required an extensive implementation, which I found online (https://github.com/NimbusKit/memorymapping) rather than writing myself. Also, if these are added should they go in libutil or a new "libcompat"?
