Re: MIPS_STABS_ELF is now broken

[Daniel Jacobowitz <drow at mvista dot com>]

On Tue, Jun 11, 2002 at 09:11:37AM -0700, H . J . Lu wrote:
> On Tue, Jun 11, 2002 at 11:38:52AM -0400, Daniel Jacobowitz wrote:
> > On Tue, Jun 11, 2002 at 08:31:42AM -0700, H . J . Lu wrote:
> > > On Mon, Jun 10, 2002 at 11:59:06PM -0700, Eric Christopher wrote:
> > > > 
> > > > > 2002-06-10  H.J. Lu <hjl@gnu.org>
> > > > > 
> > > > > 	* config/tc-mips.c (s_mips_file): Never pass the first .file
> > > > > 	directive to dwarf.
> > > > > 
> > > > 
> > > > Daniel solved this a different way, by adjusting the file directives
> > > > that come out of gcc. See the patch he posted to gcc-local and I was
> > > > meaning to test a few days ago.
> > > > 
> > > 
> > > How does it work with gcc 2.96? I don't want to modify gcc 2.96 for that.
> > > The fact is before that change, everything works fine. I don't believe
> > > modifying gcc is the solution. Are you going to offer the new gcc binary
> > > for each different version of Linux/mips gcc? In any case, I will fix it
> > > in my Linux binutils if you plan not to support the existing Linux/mips
> > > gcc binary.
> > 
> > HJ, the debug information being emitted by GCC is obviously in error. 
> > If you ignore the first .file directive, you will then not accept
> > _VALID_ DWARF-2 debug information.  You can't have it both ways.  This
> 
> Are you really sure about it? gcc 3.1.1 seems to work fine with my patched
> gas and dwarf on Linux/mips. Could you please try gas with my patch and
> gcc 3.1.1 without yout patch on Linux/mips?

I'm not saying that won't work.  But that is not what valid DWARF-2
information is supposed to look like.  The extra .file is bogus and a
conforming MIPS compiler will not emit it.

I don't want to carry this wart around forever.

-- 
Daniel Jacobowitz                           Carnegie Mellon University
MontaVista Software                         Debian GNU/Linux Developer