Re: target/6522: Incorrect struct offset for unaligned 64-bit fields in debug information

[Daniel Jacobowitz <drow@mvista.com>]

The following reply was made to PR target/6522; it has been noted by GNATS.

From: Daniel Jacobowitz <drow@mvista.com>
To: jakub@gcc.gnu.org, fred@nextnewgig.com, gcc-bugs@gcc.gnu.org,
	gcc-gnats@gcc.gnu.org
Cc:  
Subject: Re: target/6522: Incorrect struct offset for unaligned 64-bit fields in debug information
Date: Thu, 2 May 2002 21:32:08 -0400

 On Tue, Apr 30, 2002 at 11:30:38PM -0000, jakub@gcc.gnu.org wrote:
 > Synopsis: Incorrect struct offset for unaligned 64-bit fields in debug information
 > 
 > State-Changed-From-To: open->feedback
 > State-Changed-By: jakub
 > State-Changed-When: Tue Apr 30 16:30:37 2002
 > State-Changed-Why:
 >     You have not provided t64.cpp (or better t64.ii if t64.cpp
 >     includes some headers).
 > 
 > http://gcc.gnu.org/cgi-bin/gnatsweb.pl?cmd=view%20audit-trail&database=gcc&pr=6522
 
 I can confirm this in 3.1.  It's present in 3.0, but worked in 2.95.3. 
 It's quite annoying, since GDB can't infer the right answer.
 
 Here's another example:
 
 typedef __complex__ float cf;
 struct x { char c; cf f; } __attribute__ ((__packed__));
 struct unpacked_x { char c; cf f; };
 
 Compile and compare the debug info; it does not respect __packed__.
 
 -- 
 Daniel Jacobowitz                           Carnegie Mellon University
 MontaVista Software                         Debian GNU/Linux Developer