standards/37734: inappropriate tests against _XOPEN_SOURCE in some #include files

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>Number:         37734
>Category:       standards
>Synopsis:       inappropriate tests against _XOPEN_SOURCE in some #include 
>files
>Confidential:   no
>Severity:       serious
>Priority:       medium
>Responsible:    standards-manager
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Wed Jan 09 23:50:00 +0000 2008
>Originator:     Steven M. Bellovin
>Release:        NetBSD 4.99.34
>Organization:
>Environment:
        
        
System: NetBSD bigboy.machshav.com 4.99.34 NetBSD 4.99.34 (BIGBOY) #0: Sat Nov 
3 16:52:15 EDT 2007 
smb%bigboy.machshav.com@localhost:/usr/BUILD/obj/sys/arch/i386/compile/BIGBOY 
i386
Architecture: i386
Machine: i386
>Description:
        Several .h files -- at least stdlib.h, unistd.h, time.h, and wordexp.h
        -- compare _XOPEN_SOURCE against 4.  This is wrong.  Open Group
        standards 
(http://www.opengroup.org/onlinepubs/009695399/functions/xsh_chap02_02.html)
        say it should be set to 600; the values listed in <sys/featuretest.h>
        suggest that the intended value in thoses tests should be 400.
>How-To-Repeat:
        See above.
>Fix:
        See above.

>Unformatted: