oksh-noxz [fork] Portable OpenBSD ksh, based on the Public Domain Korn Shell (pdksh).
	git clone https://noxz.tech/git/oksh-noxz.git
	oksh-noxz

commit: d79764eb05ff8dbd83a6b536713984330c66a5df
parent: 35d7afb63a3f71d3050cdd4fb03b0fbf346f2983
author: Brian Callahan <bcallah@openbsd.org>
date:   Sun, 1 Nov 2020 09:30:08 -0500

It is easier to remove than to add. This allows Linux to compile
OOTB with --no-thanks.

diff --git a/configure b/configure
@@ -814,6 +814,7 @@ if [ $doconfigure -eq 0 ] ; then
 /* #define HAVE_ASPRINTF */
 /* #define HAVE_CONFSTR */
 #define NO_CURSES
+#define issetugid(x) 0
 /* #define HAVE_PLEDGE */
 /* #define HAVE_REALLOCARRAY */
 /* #define HAVE_SETRESGID */