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Message-ID: <1104894563.41db5a6383d89@webmail.unb.ca>
Date: Wed, 05 Jan 2005 03:10:00 -0000
From: Adam Richard <g4c9z@unb.ca>
To: gdb@sources.redhat.com
Cc: Daniel Jacobowitz <drow@false.org>
Subject: Re: warning: Unable to find dynamic linker breakpoint function
References: <1104355984.41d322909c42d@webmail.unb.ca> <20041229214406.GA5135@nevyn.them.org> <1104453359.41d49eef5093e@webmail.unb.ca> <20041231004046.GA17098@nevyn.them.org> <1104501082.41d5595a81666@webmail.unb.ca> <20041231190856.GA10862@nevyn.them.org> <1104879799.41db20b73f7eb@webmail.unb.ca> <20050104230644.GA27358@nevyn.them.org>
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> > > > > > I read somewhere that it
> > > > > might
> > > > > > have to do with a stripped gdb but I don't understand why I can't have a
> > > stripped
> > > > > gdb
> > > > > > so I'm hoping for an explanation.
> > > > > 
> > > > > Not a stripped GDB, a stripped dynamic linker (/lib/ld-linux.so.2).
> > > > 
> > > > OK, why does a stripped dynamic linker impair debugging?  I noticed that that
> file
> > > is
> > > > part of the glibc package, and I can see why stripping it would prevent being
> able
> > > to
> > > > step into its functions for any program which depends on it (which is most
> > > programs). 
> > > > But I still don't understand your explanation.
> > > 
> > > Because GDB has trouble finding the list of available shared libraries.
> > 
> > I tried recompiling glibc without stripping it (at least I used the "nostrip"
> option in
> > Gentoo) and it didn't make a difference.  Are you sure that's what makes the
> warning go
> > away?
> > 
> 
> You'll have to debug GDB yourself to figure out why it's being
> produced, then.

Actually, I just discovered what was wrong.  I didn't have debug info compiled into
glibc.  After including it (with the debug USE flag in Gentoo; I don't know how to do
it normally), the warning went away.

Thanks for all your help.