Hi, We hit a bug in Gentoo with getopt_long(). It appears the alpine people hit it too http://bugs.alpinelinux.org/issues/4802. The problem was encountered in open-iscsi but I got some reduced code which I've attached. If you build and run that code as `./test --portal 10.144.0.14 --discover` then you get p D unrecognized character 'D' On a glibc system, you don't get the "unrecognized character 'D'" which is what we'd expect. Rich suggested a patch to musl which looked like it might work, but it didn't. I didn't investigate further. I'm just reporting it first to see if others know what's up. -- Anthony G. Basile, Ph.D. Gentoo Linux Developer [Hardened] E-Mail : basile@freeharbor.net GnuPG FP : 1FED FAD9 D82C 52A5 3BAB DC79 9384 FA6E F52D 4BBA GnuPG ID : F52D4BBA