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To: Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at>
Cc: Per Bothner <per@bothner.com>, <gcc@gcc.gnu.org>
Subject: Re: misleading statement in bugs.html#known
References: <Pine.BSF.4.43.0112061238420.25049-100000@naos.dbai.tuwien.ac.at>
X-Yow: I have seen these EGG EXTENDERS in my Supermarket..
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From: Andreas Schwab <schwab@suse.de>
Date: Thu, 06 Dec 2001 04:46:00 -0000
In-Reply-To: <Pine.BSF.4.43.0112061238420.25049-100000@naos.dbai.tuwien.ac.at> (Gerald Pfeifer's message of "Thu, 6 Dec 2001 12:39:43 +0100 (CET)")
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Gerald Pfeifer <pfeifer@dbai.tuwien.ac.at> writes:

|> On 5 Dec 2001, Andreas Schwab wrote:
|> >|> The point is that glibc allows you to *assign* to stdin, so it is
|> >|> no longer constant.  This is a questionable feature..
|> > No.  The real reason is that using the address of a static object is a
|> > nightmare in context of maintaining binary compatibility.  Platforms t=
hat
|> > use copy relocations will lose if the size of the FILE type changes.
|>=20
|> Would (one of) you (who knows this stuff) mind updating bugs.html?

How about this:

--- bugs.html.~1.45.~	Sun Nov  4 00:14:32 2001
+++ bugs.html	Thu Dec  6 13:29:35 2001
@@ -276,10 +276,10 @@
 </code></blockquote>
=20
 will not compile with GNU libc (GNU/Linux libc6), because
-<code>stdin</code> is not a constant.  This was done deliberately, in
-order for there to be no limit on the number of open <code>FILE</code>
-objects.  It is surprising for people used to traditional Unix C
-libraries, but it is permitted by the C standard.</p>
+<code>stdin</code> is not a constant.  This was done deliberately, to make
+it easier to maintain binary compatibility when the type <code>FILE</code>
+needs to be changed.  It is surprising for people used to traditional Unix
+C libraries, but it is permitted by the C standard.</p>
=20
 <p>This construct commonly occurs in code generated by old versions of
 lex or yacc.  We suggest you try regenerating the parser with a

Andreas.

--=20
Andreas Schwab                                  "And now for something
Andreas.Schwab@suse.de				completely different."
SuSE Labs, SuSE GmbH, Schanz=E4ckerstr. 10, D-90443 N=FCrnberg
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