Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones

[Jakub Jelinek <jakub@redhat.com>]

The following reply was made to PR c++/9265; it has been noted by GNATS.

From: Jakub Jelinek <jakub@redhat.com>
To: Robert Schiele <rschiele@uni-mannheim.de>
Cc: cc@pi3.informatik.uni-mannheim.de, gcc-bugs@gcc.gnu.org,
   gcc-gnats@gcc.gnu.org
Subject: Re: c++/9265: exception handling faulty wenn linking PIC objects to non PIC ones
Date: Tue, 4 Feb 2003 15:19:06 -0500

 On Tue, Feb 04, 2003 at 08:43:55PM +0100, Robert Schiele wrote:
 > On Tue, Jan 14, 2003 at 11:37:22PM +0100, Robert Schiele wrote:
 > > Hello Jakub.
 > 
 > Hello, did you miss my last message?  Could you give a comment on the
 > issue, or at least state that you can't/won't for any reason?
 > 
 > > As you did some of the recent changes related to .eh_frame_hdr stuff
 > > in crtstuff, I expect you to be able to give some comments on c++/9265
 > > or at least can name a person that should have an idea what the
 > > problem could be.
 
 Cannot reproduce this, works just fine with
 gcc version 3.2.1 20021207 (Red Hat Linux 8.0 3.2.1-2)
 GNU ld version 2.13.90.0.16 20021126
 
 You obviously cannot mix crt* files between different gcc builds,
 particularly you should never use crt* files from gcc build
 which has
 #define HAVE_LD_EH_FRAME_HDR 1
 in auto-host.h
 in gcc which does not have it.
 gcc which has the above defined during configure will have:
 %{!static:--eh-frame-hdr}
 in specs and thus ensure PT_GNU_EH_FRAME is created:
 readelf -l a.out
 
 Elf file type is EXEC (Executable file)
 Entry point 0x80484ac
 There are 7 program headers, starting at offset 52
 
 Program Headers:
   Type           Offset   VirtAddr   PhysAddr   FileSiz MemSiz  Flg Align
   PHDR           0x000034 0x08048034 0x08048034 0x000e0 0x000e0 R E 0x4
   INTERP         0x000114 0x08048114 0x08048114 0x00013 0x00013 R   0x1
       [Requesting program interpreter: /lib/ld-linux.so.2]
   LOAD           0x000000 0x08048000 0x08048000 0x00734 0x00734 R E 0x1000
   LOAD           0x000734 0x08049734 0x08049734 0x00130 0x00138 RW  0x1000
   DYNAMIC        0x000744 0x08049744 0x08049744 0x000e0 0x000e0 RW  0x4
   NOTE           0x000128 0x08048128 0x08048128 0x00020 0x00020 R   0x4
   GNU_EH_FRAME   0x000678 0x08048678 0x08048678 0x0001c 0x0001c R   0x4
 
 	Jakub