KWSys 2022-01-31 (9fd1660a)

Code extracted from:

    https://gitlab.kitware.com/utils/kwsys.git

at commit 9fd1660a9ddeaf9cb590bfd801c94a7a374ae94b (master).

Upstream Shortlog
-----------------

Aaron Liu (1):
      dc6b6641 testSystemTools: apply root-check on AIX

testSystemTools.cxx

@@ -336,7 +336,7 @@ static bool CheckFileOperations()
   // While we're at it, check proper TestFileAccess functionality.
   bool do_write_test = true;
 #if defined(__linux__) || defined(__FreeBSD__) || defined(__OpenBSD__) ||     \
-  defined(__NetBSD__) || defined(__DragonFly__)
+  defined(__NetBSD__) || defined(__DragonFly__) || defined(__HOS_AIX__)
   // If we are running as root on POSIX-ish systems (Linux and the BSDs,
   // at least), ignore this check, as root can always write to files.
   do_write_test = (getuid() != 0);