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Re: Binary compatibility loss regarding errno

From: "H. J. Lu" <hjl at lucon dot org>
To: Roland McGrath <roland at redhat dot com>
Cc: Daniel Jacobowitz <drow at mvista dot com>,libc-alpha at sources dot redhat dot com
Date: Mon, 30 Dec 2002 13:53:08 -0800
Subject: Re: Binary compatibility loss regarding errno
References: <20021230101648.A3804@lucon.org> <200212302139.gBULdUU13905@magilla.sf.frob.com>

On Mon, Dec 30, 2002 at 01:39:30PM -0800, Roland McGrath wrote:
> 
> > Please try
> > 
> > extern int x;
> > int _x __attribute__((section (".bss")));
> > asm(".symver _x,x@VERS_1");
> > int foo() { return x; }
> 
> That produces an undefined reference to unversioned `x'.
> 

If _x is undefined, as will generate a versioned reference to x.


H.J.

References:
- Re: Binary compatibility loss regarding errno
  - From: H. J. Lu
- Re: Binary compatibility loss regarding errno
  - From: Roland McGrath

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