doc: note that fs.futimes only works on AIX >7.1

gibfahn · addaleax · commit adb0f4601dba · 2017-07-18T19:57:09.000+02:00
PR-URL: #13659 Fixes: #12609 Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com> Reviewed-By: Refael Ackermann <refack@gmail.com> Reviewed-By: Colin Ihrig <cjihrig@gmail.com> Reviewed-By: James M Snell <jasnell@gmail.com> Reviewed-By: Richard Lau <riclau@uk.ibm.com> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com> i
diff --git a/doc/api/fs.md b/doc/api/fs.md
@@ -1225,6 +1225,9 @@ changes:
 Change the file timestamps of a file referenced by the supplied file
 descriptor.
 
+*Note*: This function does not work on AIX versions before 7.1, it will return
+the error `UV_ENOSYS`.
+
 ## fs.futimesSync(fd, atime, mtime)
 <!-- YAML
 added: v0.4.2
