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Date: Sat, 28 Oct 1995 05:29:30 +1000
From: Bruce Evans <bde@zeta.org.au>
Message-Id: <199510271929.FAA25371@godzilla.zeta.org.au>
To: julian@ref.tfs.com, vcapuano@esoc.esa.de
Subject: Re: _SC_PAGESIZE patch to sysconf(3)
Cc: freebsd-hackers@freebsd.org
Sender: owner-hackers@freebsd.org
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>It's not a bad addition, but it's not in the POSIX  definitions
>that I can see, though I only have the XPG4 definitions which
>allign this call to posix-1 despite having some posix 2 definitions in it
>(the posix 2 standard was still not approved when XPG4 went to print I think)


>if this is not POSIX standard it should be hidden behind a
>#ifndef _POSIX_SOURCE
>> 
>> I was porting a program I developed on Solaris to FreeBSD when I got into a
>> missing call: sysconf(_SC_PAGESIZE). I know I could use getpagesize(3), but
>> I then had to ifdef my code.

It's already hidden by using an identifier in implementation's namespace.
An application that is careful enough to define _POSIX_SOURCE should be
careful enough not to reference nonstandard indentifiers.

Bruce